● C3 corvette heater core bypass :toetap: Bypassed the core and fixed C3 Tech/Performance - Heater core peeing - bypass? - I think I might have to bypass is while I figure this out. i dont have the $$$ or the time to fix it right now but since C4 Tech/Performance - Heater Core Bypass help - Hey everyone, My heater core is beginning to fail, so until I can fix it later this summer I was going to bypass it since I would not need heat til the winter. The only time the C3 heater valve will open allowing flow through heater core is went the heat inside the car is selected. I was able to confirm that the coolant outlet on the intake manifold that originally sends coolant to the throttle body is for 5/8 Bypassing the heater core is a temporary solution at best. I bypassed it and have never had the desire to hook it back up. Aside from stopping the leak, some guys opt to simply bypass the heater core vs replacing it. C3 Tech/Performance; C3 General; C3s C3 Corvettes, 1968 - 1982; C3 Tech/Performance; Coolant Leak - Heater Core? I am thinking about bypassing the heater core for now if it is the problem so I can drive till a replacement comes, but the amount of coolant on the garage floor (estimate at least a gallon) makes me a bit nervous. It's not getting on the carpet, so that's not a problem - just get 1/8 cup or so of coolant under the car after it gets hot. Reply Small block Chevy engines have a coolant bypass built in. C3 Corvettes, Can I just cap off heater core,I think I have a leaking heater core,or did at some point,I don’t have the hoses hooked up to manifold,because fuel line is in the way of hose,so when I did new heads,intake,carburetor replacement,I C3 Corvette Forums. Sponsored by: Bypass the heater core. New HD side yokes C3 Tech/Performance - Heater Valve & Leaking Heater Core - I have a 73 BB with AC. . I know some folks have discussed the bypassing of the heater core, but I glanced around and did not find one specif In this video I did a quick and cheap heater core bypass. Had seen a post about bypassing the heater core, but C3 Tech/Performance - Heater-Core Bypass How? - Hmmmm, so I have been trying to make sense of the hose routing to bypass my newly discovered, slow leak heater core. The heater core has started leaking, not so lucky that it is not a loose hose at the core connections. Menu. Can I hook up the hose from manifold to water pump to bypass core and keep it that way over the summer w/o drivability problems and w/o concerns of overheating? C3 Corvettes, 1968 - 1982. com FREE DELIVERY possible on eligible purchases C4 Tech/Performance - LT1 Water Pump - Heater Bypass or Blockoff? - I have all my a/c and heater components removed from the car, so I'm trying to figure out the best way to disable/bypass the heater connections on the water pump. gm #: 3794094 . This is a temp solution for a couple of months until I have the vintage air wired and charged. 1968, 1982, 74, bipas, bypass, c3, chevy, core, corvette, heads, heater, hose, hoses, put, vortec. Following the path of other questions for this: Can I get to it from the firewall (1969 427 conv)? Went to bypass the heater core and discovered that the bottom hose is smaller than the top hose and won't fit C4 Tech/Performance - Heater core bypass - Hi all, Need to change heater core and also locate a heater valve (missing) for my 84'. Login/Register Heater Core Bypass (13/23) 6/9/09 1:03pm. Since my car is an LS5 with ac I?m not just sure how to do it. Would it be a good idea to just take off the 3/5 C3 Tech/Performance - Bypass heater core - I just bypass the heater core, i plugged the intake , water pump & heater hoses. Reply . Heater Hose Bypass 2009 C6. However, I did not use the Heater Control Valve when re-connecting as the old thing in the C3 Corvettes, 1968 - 1982; C3 General; Vortec coolant bypass installation with heater; C3 General General C3 Corvette (the one close to the manifold that feeds the heater core inlet and the bypass) must be oriented so the "in" flow to the tee is from the side, and the two outs are straight across from each other. Sponsored by: URGENT HELP! HEATER CORE -Leaking, mechanic suggests replacing, NEED YOUR IDEAS Some use a 5/8 to 3/4 inline connector to connect the hoses in a loop bypassing the heater core. Looping a hose does nothing more. Its going to be a big job. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 C5 Tech - Heater core bypass - Was out picking up a part for my wife's car yesterday afternoon and once I arrived home and was pulling into the garage, smoke started coming in from all the vents. I will not get around to C3 Tech/Performance - Bypassed the Heater Core Valve - Ok, I went thru the labor of changing the Heater Core with the help of my friend 454Big (or Big454, I always mix that up) and installed new heater hoses (core to engine). C5 General - Heater core bypass? - With the heat on I have been smelling antifreeze in the cabin. C5 Tech - Heater core bypass - Been wanting to bypass my heater core for a while since I don't need the heater and it's just one less thing to potentially break on me. Want to use car. Anyway, I decided to take the Corvette out for a ride. When I built the engine to ~420hp it obviously made more heat. I am completing a frame off and replaced the water Rev 2. Prior to the install, must have spent hours on the Internet, reading manuals, and even talking to some so-called expert Corvette shops about this topic and all were WRONG. live in California drive it during summer never have used the C3 General - Heater Core Bypass - Anyone have any images/videos on how to do a heater core bypass? Mine crapped itself and was planning on just bypassing it, but I'm not entirely sure how. Racer . C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; On the good side, I put in a bypass and what a difference in temps inside . After discovering that my heater core does leak inside the car, I am thinking of pulling the heater core hoses from the heater core C3 Tech/Performance - Bypassing the heater core on a 1980 - There have been a number of posts on the best way to bypass a heater core. Sponsored by: Bypassing Heater Core. Being summer I may just look to bypass by connecting the hoses but C3 Tech/Performance - Heater Hose Removal - Can I just remove the two hoses to the heater core and plug the two holes one in the intake manifold, the other in the water pump? Should a bypass be run from one to the other to respect flow? Reply Like. Most of the product photos for heater core I currently have the ICT heater core bypass hose installed on the LS water pump and therefore no heat. C3 Tech/Performance - Can I bypass the heater core? - I need to replace the hoses from the water pump to the heater core and from the heater core to the intake manifold. Need some advice and maybe some clarification. But the typical c3 corvette owners i have known and come across on this forum, are lucky to drive the car 500 C3 Tech/Performance - Heater Core bypass - Hi, Guys, I would like to bypass my heater core in my 1978 L48 w/AC. I had to bypass it in the parking lot and walk to Ralphs to get some distilled water. I made it about a mile C3 Tech/Performance - Bypassing the heater core. Lots of choices for cutoff valves and some valves that just reroute the hot water so it never enters the cabin. My boys and I are working with a 74 with the 350 J motor. So either you drive around with heat on all time, or install a bypass. C3 Corvette Heater core bypass. In C3 General - Bypass Heater Core - I am wanting to bypass the heater core in my 78. Reading on the Forum Half the dash has to come out and takes a lot of time. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for C4 Tech/Performance - 1989 Heater Core Inlet hose diameter throttle body coolant bypass - Going to do the throttle body coolant bypass mod on my 1989. the heater core took a crap I either replace or bypass , thinking of bypassing it. I bypassed it for now, until I find a shop to do the job Does anyone have any idea how much a Rather than just bypassing the heater core, which essentially "short circuits" part of the cooling system, simply plug off the lines heading to and from the heater core. this all started with a bad exhaust valve thinking I could DISCLAIMER: This procedure may vary from Corvette to Corvette. Motor will be running a C4 General Discussion - C4 Heater Core - Can I Bypass it?? - My Heater Core has started to leak on my 87 Coupe. Reflective insulation on the underside of the floor pans where the exhaust is very close, heater core bypass valves, blower fan actually off when off (in 79 Chevy started making off just low speed). There is a short hose that runs from C3 Tech/Performance - 81 with AC, Heater Core Replacement - I need to replace my heater core, I have to take the dash apart and undo the hoses from underneath right? If you don't have time to search for weatherstrip, you may want to purchase a weatherstrip kit. 1980 Heater Core Replacement. You might want to bite the bullet and What I would do is bypass the heater temporally and run the heater for a few I have a 1980 Corvette with AC and am trying to bypass the heater core. 1 Nov 29, 2024 | 12:07 AM Share #15 Five. Don't see any fluid on the passenger side floor. I'm so close to wrapping things up but I cannot find a decent diagram to illustrates exactly how to run the two hoses from the heater core and the two hoses coming from the manifold C3 Tech/Performance - heater core replacement - 1977 vette - The heater core access of 77 vette with A/C is from inside or outside? C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette. The passenger floorboard is not wet but I was pretty sure it was the heater core so I decided to bypass it the other day. I deleted all the AC stuff and need to get a cover and blower, but wont do that for a while. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 What I would do is bypass the heater temporally and run the heater for a few days to dry out the core. I know there's been a lot of discussion about bypassing the heater core, to avoid heat in the cabin, or simply clean up the engine bay. five-six. Have you done it? I have had to bypass the heater core due to a leak in the past. I live in Houston Texas so it gets a bit warm here in the summer months and freezing some times in the In this video I show you the step by step on how to replace a heater core in a C3 corvette. It comes out the defrost,. For the guys who have done it, there are 2 hoses - 1 from water pump to heater and 1 from heater to intake/thermo. On the way over I blew the heater core. Pulled over and noticed C3 Tech/Performance - Heater core blew! Can I plug the intake and water pump or run a bypass hose? - We just returned from a beautiful trip to the Oregon coast. Likes: 0. Can I permanently bypass the heater core by directly connecting a single hose from intake back to water pump? C3 Corvettes, 1968 - 1982. In this video I did a quick and cheap heater core bypass. Can I just plug the hole in the intake and run a hose from the expansion tank to the water pump?Any instructions or pictures would be great. would it be ok to connect the 2 hoses that go to the water shut off valve ? and what size connector would I need ?? C3 General General C3 Corvette Discussion not covered in Tech. In loving memory of lost CorvetteForum Brothers and Sisters; C8 Corvette. C3 Tech & Performance Replacing my 75 Heater Core. Then run the air for a while see what it does. View Next Unread. I cannot find the intake and or exit lines coming through the firewall when looking from under the hood. How do I bypass the heater core. I live in Texas where it gets very hot during the summer. Thread Tools Search this Thread 06-29-2013 | 11:36 PM #1 C3 Corvettes, 1968 - 1982. I have a 1975 Corvette and from time to time, I will find ~ 1/2 cup of coolant on the ground underneath the passenger side of the vehicle. and then loop the heater core hose back to itself though, one hose C3 Tech/Performance - Heater Core Bypass and Overheating - I have an '82 which had a leaking heater core. it kinda looks like a crooked letter "P" with one hose going in and C3 Tech/Performance - 69 How to replace heater core - Hey all- anyone ever replaced the heater core in a 69 L46 no A/C? C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette. pn: 738016 . C3 Corvettes, 1968 - 1982; C3 General; Heater Core Bypass; C3 General General C3 Corvette Discussion not covered in Tech. C3 Tech/Performance - Should I replace the heater core? - I am going to be replacing everything in my cooling system here as my next project. C3 Tech/Performance; C3 Description and tips on Heater Core replacement for C3 Corvette. It seems to me that this could C3 Tech/Performance - Heater Core leaking - Now I have the dreaded heater core leak and my carpet is soaked. The motor runs cooler without the heater core in play for some reason (probably the old one was blocked and C3 Tech/Performance - Heater Core- Non-AC '69 - Just replaced the heater core on my C3 and it was the easiest thing ever done to the car. Sponsored by: Heater core shutoff causing overheating. I cannot find a fitting that lets me connect 3/4 hose to 5/8 hose to bypass. i think i have a leak either in a hose to the heater core or a hole in the core itself. We've redone the brakes, and now it's time to do some motor work. Jump to Latest 20K views 27 replies I am attempting to place a heater core bypass on my 1980 Corvette. Years ago, I simply did a bypass of my heater core in my 76 Grand Prix by taking the two heater hoses and running them from one to the other with a metal fitting. C3 Corvettes, 1968 - 1982; C3 Tech/Performance; Heater-Core Bypass How? C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and C3 Tech/Performance - Heater Core Bypass - one plug better than another??? - Had the antifreeze leaking out the heat duct in the cabin. Reply Like 03-06-2015 | 11:29 PM #8 C1 & C2 Corvettes - Heater Core '67 SB - Any advice on a heater core source ? I'm having some health issues so not sure if I want to download the shop manual & do it myself. - I will be installing my L82 engine and T 10 4 speed very soon and will need to re-route the heater hose since all of the A/C and heater system has been removed. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 Corvettes C3 General - Heater Core Bypass Needed? - Hello, I do not have a heater core in my car at the moment. I switched from ricer cars, aka Turbo'd eclipse, to corvettes. Tried NAPA, Home Depot, etc. Now the temp gauge is all over the place. It's that simple. I do not need heat. All said A lot words in your explanation above. :laughing: On my 1987 Mercury Sable I used to have, the Heater Core had this horrible leak. to the front of the core cover along with 10mm screw holding the by-pass pipe to the top of the cover. 5K Yes, to replace the heater core in a 1980 Vette requires disassembly of most of the dash. People are not kidding when they say that the Corvette was built around the heater core! This guide should be used as a secondary guide to the Corvette Service Manual. I am concerned about plugging holes C3 Corvettes, 1968 - 1982. This little beauty fills the bill o C3 General - 1972 Heater Core - 1972 Corvette, 350, A/C, 4 speed How difficult is it to change out the heater core? Where is the best place to buy Corvette replacement parts? My heater core ruined a brand new passenger side carpet by leaking. a functioning part of the car and Heat is nice in the winter. C3 Tech/Performance; C3 General C3 Tech/Performance - Heater Core Bypass pics?? - I know this topic has been covered many times, but my heater core just went out and I want to bypass it until I have time to do the switch. C3 Tech/Performance - Big Block heater hose/connections-help (Pics) - Hello, Need some direction on some heater hose connections and the short hose that runs from the intake to the water-pump for BBC. Sponsored by: How to bypass heater core? Reply Subscribe . I haven't even found the fuse box yet. C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette. Thread Tools Search this Thread Jun 14, C3 General - Heater Core Bypass - Hi guys, on an 82 Corvette I want to bypass the heater core without noticing it from looking under the hood. Sponsored by: C3 General - Heater Core Bypass - Anyone have any images/videos on how to do a heater core bypass? Mine crapped itself and was planning on just bypassing it, but I'm not entirely sure how. I read that the hose from the radiator that goes to the top, should be adapted to go on the bottom of the Should I use blockoff caps on intake manifold and water pump or is it better to bypass the heater core with a simple hose between manifold and pump, like a loop ? c3, corvette, heater, hose, outlets, pump, rerouting, water. Where it comes back C3 General - Heater core bypass - Hi guys, I?ve got a leaking heater core so I need to bypass it. Have new one coming but won't be able to install before the weekend. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; Remove or bypass? Bypass can be done with a simple U shape hose, removal will require a do-able but tedious task of dismantling the dash. It cools better now and I get vent temps of 43 degrees. , The existimg control C3 Corvettes, 1968 - 1982. C3 Corvette Changing a heater core. its the third hole on the passenger side of the water pump pad. C3 Tech/Performance - Heater bypass - My dad gave me his Corvette, I've spent the last summer ironing things out, yeah my dad was a little bubba on things. Jump to Latest 3. I intend to bypass the heater core and not remove or replace the heater core. My heater core is leaking antifreeze so in order to get the car running without replacin C3 Tech/Performance - Heater core bypass - Hello everyone, as i mentioned in the title i have done a heater core bypass because my heater core was leaking inside the car. guru is your independent Corvette resource. Sponsored by: 69 How to replace heater core. Is the heater core located under the dash like many modern cars? I'm not really familiar with this car yet. How big of a deal is it to replace the heater core in a C3 and will having had it bypassed for so long affect C6 Corvette General Discussion - Heater core bypass - I have a c6 that is a track car and I am bypassing the heater core. Sponsored by: Heater Core Bypass. From C3 Tech/Performance - C3 heater core replacement - I am going to look at a 1969 Corvette this weekend and the seller told me that the car's heater core is bypassed and has been since he's owned it (16 years). Take my word for it---Bypass the heater core--connect the two hoses with a piece of pipe--It's a real bear of a job--ask me how I know!! C3 Tech/Performance - Bypass the heater core??? - I discovered last night the the heater core has gone bad. Reply I did the same thing but didn't bypass, it just shuts off C3 Tech/Performance - Heater Core Bypass Questions - I am doing my engine over and was considering installing heater core bypass valves. Reply Like 01-02-2010 | 01:23 PM About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright C3 Tech/Performance - Heater Core brands - which is best? - In finishing up a restoration on my '69, noticed my heater core is leaking before all the interior goes back together. I have the Holley Mid Mount that has 2 sets of heater hose ports. C3 Tech/Performance - Heater Core bypass - Hi, Guys, I would like to bypass my heater core in my 1978 L48 w/AC. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 Corvettes, 1953 - 1967 if you don't need your heater you may be able to just C4 General Discussion - 92 heater core bypass routing - I could tell from the last few months watching the level in the overflow tank slowly drop that I had a coolant leak somewhere. If the mist goes away with just the heater on I would lean towards the heater core. Vintage A/C to be installed at later date. This is NOT C1 & C2 Corvettes - Heater core and hoses - I am working on 327/350, 66, without air. Back in the day he added an expansion tank (my dad said it didn't originally have one because it's a big block. C1 & C2 Corvettes; I still have the heater core C3 Corvette Forums. Cart Wishlist. Posts: 317. Sponsored by: Bypass Heater Core. The car has AC and cannot see the hoses for the heater core entering or Part 1 details the steps and provides tips on installing a new heater core in an air-conditioned C3 Corvette. Thread Tools Search this Thread 08 C3 Tech/Performance - Heater Core Leaking 82 Bypass? - I have been told that the 82 has a bypass valve for the heater core. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 Buy 4 Way Heater Core Bypass Kit, 3/4'' Heater Hose Shut-Off Valve, 4-Way Heater Control Valve, 3/4 inch Heater Core Bypass Valve with Switch 3/4" Hose Barb, for Car Heater Air Conditioning System: Heater Control Valves - Amazon. Where should it be located? If I can not find it, can I disconnect and splice the two lines together going to the heater core from the underside C3 Tech/Performance - Heater core by-pass - Hi there guys, I'm replacing my leaking heater core, everything out now. I changed: blocks, thermostats (was 160 deg. I cheated and put a U-hose in place to bypass my heater core, in the engine bay. Reply Subscribe . I don't trust my C4 General Discussion - 1985 Heater core leak - help with Bypass - I was driving to work this morning and noticed a terrible smell and a continuous fume coming from the top vent under the windshield. Heres pictures circled in red of bolts that hold vent pices in and there are some hidden bolts on bottom of dash and like 2 Certainly, the topic of heat inside a C3 has been discussed a number of times. Heater core is leaking on the passenger side floor. Someone also said it was a good C3 Corvettes, 1968 - 1982. Please like and subscribe, thanks! C3 Corvette Parts Auctions on eBay Corvette Books C3VR In-Stock Apparel & Accessories C3VR Member Name Badges C3VR Custom Apparel & Accessories So thus I want to bypass it. I picked up a heater core hose bypass valve for the always running heater core and blower motor issue in c10s from the factory. Apparently my new heater must be leaking. com. 1968 C3 Tech/Performance - Heater Core Replace Cost $$$$$ - The heater core is leaking on my 77' and needs to be replaced. I've ran a hose from the manifold to the water pump but was wondering if this is needed, can I just plug both the manifold and the heater core without any problems. Back in the olden times, before HVAC with hot and cold decks, temps in the heater core were controlled by a valve in the hose leading from the thermostat to the heater core. Sponsored by: How do you test a heater core for leaks? Reply Subscribe To solve the issue for the moment I just bypassed the heater core by running the larger of the two hoses in a loop in and out of the water pump. Joined: Oct 2006. I've decided I'm going to put a heater core bypass in the car once I fix the heater core. Oh and to mention I have replaced hundreds of heater cores on various models that did the same thing. Motor C3 Tech/Performance - what is a waterpump bypass hose? - On a Vette are they the same as heater hoses? :confused: I am seriously considering bypassing the heater core as I am missing the pipe that runs under the A/C compressor and I am seeing too many places where they can chaffe. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; If mine ever goes I'm just going to bypass it, really dont need the heater that much anyway. Can anyone tell me if it'll be ok to bypass the heater core and still use the car without a problem? C3 Corvettes, 1968 - 1982. ***. Is ther any advantage to either one. C3 Corvette. I only drive the car infrequently in good weather during the spring, summer and fall. Corvette Year: coolant control valve to heater core. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 Corvettes C3 Corvette Parts Auctions on eBay Corvette Books C3VR Member Name Badges C3VR In-Stock Apparel & Accessories C3VR Custom Apparel & Accessories @ Zazzle C3VR Window Stickers C3VR Member Deals & Discounts C3VR Member Calendars Shop Amazon. So the heater core leaked and I looped the hose C3 Tech/Performance - Question on shut off valve on the coolant line to the heater core - Can someone tell me what size line this is or what size (diameter) valve I need for a 77 L48 stock line. C3 Corvettes, C3 Tech/Performance - AC work with heater core bypassed? - I have a 77 that has the heater core bypassed just wondering if the AC will still work. Sponsored by: Heater Core C3 Corvette Forums. A lot of people tend to spend big money to Just install plugs (buy at Advance Auto and others) for the engine and water pump where the hoses are attached and get rid the engine of the hoses. The plugs or 5/8 3/4 C3 Tech/Performance - Bypass the heater core - What is the easiest way to bypass the heater coil, have to replace it, but do not need it until fall. New Member. Reply C3 Tech/Performance - ByPass Heater Core - Hi Everyone, I Just installed my new motor and decided to bypass the heater core. Due to the amount of time required to replace it, I just bypassed it and ran a heater hose from the water pump to the intake manifold to complete the loop. side of car) and connect them with a male/male nipple. - Finally found a post that explained why my windows kept fogging/steaming up. Reply Are you blocking the heater core or bypassing it? I suspect you are just blocking it. Sponsored by: Heater core by-pass. First I tried just putting blockoff caps, but these quickly started cracking and getting C1 & C2 Corvettes - Heater core by-pass valve + insulation works! - Last summer I installed an automotive, manual in-line valve in my 5/8 heater hose. The only reason I'd do it to get There is a right way and a wrong way to do the heater core bypass on the LS1 motor in the C5 (1997-2004) Corvette. Thanks ! Log In; Register; Forums. (With AC) C3 Tech/Performance - Heater Core Bypass - I recently purchased a Stingray and in short order, the core started to leak. It is predominately a Show Car so I rarely drive her anywhere during the Winter months. Guys have simply used screw-in plugs for the in-take manifold and water pump. But strongly suspect the heater core is leaking. simply connect a hose between both those two nipples: I would like to bypass my heater core in my 1978 L48 w/AC. I plan on taking out the radiator and replacing myself (seems too easy to have someone else do) But the heater core might be a different story. Screw sizes may vary and/or procedure may be different for non air conditioned cars or for your 81. C3 Tech/Performance - Exact Fit Heater ByPass Hose for AC Delete Vettes - Hi guys. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; He recently serviced his 94 LT1 Corvette heater core. ). Does anything need bleed after or will the air you let C3 Corvette Forums. My question is the expansion tank. In the winter just open the valve and you have heat. Until the winter when I plan to replace it, I am told by reputable sources that I can do the following temporary bypass: detach the two hoses from the HC inlets, inserting one marble or ball bearing into each hose, and then reatach them. Back to Subforum. Joe. Sponsored by: heater core replacement - 1977 vette A lot of these cores are bypassed C1 & C2 Corvettes - Bypassing the heater core - I've developed a small leak in my heater core. It's a SB 350 set up. Sponsored by: 78 Vette Heater Control Valve Location Shuts the water pff to the heater core and the cabin will be cooler. C3 Tech/Performance - Heater Core Replacement on 69 BB - All, I remember reading about a heater core replacement thread, but was unable to locate it. Some have argued that C4 Tech/Performance - 1990 heater core removal in 2 1/2 hours - I just did this on my 1990. For the life of me I can not find it on my car. C3 Corvette Heater Core Replacement Heater core is now definitely beyond stop leak. I'll take a look I can snap a pic of the lines you want to mate tomorrow but all you need to do is remove the lines going into the heater core (pass. 10-11-2006 | 02:49 PM #4 rotgirl. 0 C3 Tech/Performance - Bypassing Heater Core - Hi folks, My heater core is leaking and I don't need no stinkin' heater. May have to buy another valve and install a bypass hose with valve ahead C3 Tech/Performance - 79 AC and Heater Core Removal - How do you replace the heater core on a 79 with AC? LOG IN; REGISTER; Forums. Suggestions welcome. He has excellent photos and commentary. I showed a mechanic my Corvette Coolant / Heater Hoses & Lines Page 1 Account Login. Jump to Latest Here's the heater core, Came wrapped in old tshirts and towels, Thanks for the shop rags, came in quite handy. C1 & C2 Corvettes; C3 Tech/Performance - Heater Core Bypass Which Hose ? - In the never ending fight against heat. Are S3E8 In today's episode I will show you how to bypass a heater core. Thread Tools C1 & C2 Corvettes - Heater core bypass - My car came with the bypass that re-routes heater core's 3/4 coolant line. If I install a blocking valve in the either the 5/8 or the 3/4 hose does that not. I have read many posts on this forum already so i C3 General - heater core bypass? - hi all, need some advice have a 1972 . C3 Corvettes, 1968 - 1982. 3 Wade Nelson Reducing Cockpit Heat in C3 Corvettes. A lot of people tend to spend big money to C1 & C2 Corvettes - C-2 heater core replacement - Does anyone know an easy way to replace a non A/C heater core on a 65. C3 Tech/Performance - 71 BB Heater Core/All Hose Routing - I completely rebuilt the AC in my 71 big block converting from R12 to 134a. C3 Corvettes, 1968 - 1982; C3 Tech/Performance; C3 Tech/Performance - TO replace or not replace (heater core) - Hello All, Thanks again for your continued help; I'm thinking about replacing my heater core. Does the shut off go between the intake and heater core or the water pump and expansion tank. Drain the heater core before you put it back together. Read that going with a GM/AC Delco heater core is the best route - however I can't find any vendors C3 Tech/Performance - Another Heater Bypass Question - Read through a bunch of posts on this topic but not sure about the final hose routing for a smallblock. Re routed the heater core hos C3 Tech/Performance - Heater core bypass - What size fittings do I need to bypass the heater core? Iwant to plug it at the water pump and also at the intake. I made a quick repair by running a bypass hose from the water pump to the intake fitting. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 C3 Corvettes, 1968 - 1982; C3 General; 78 Vette Heater Control Valve Location; C3 General General C3 Corvette Discussion not covered in Tech. You can by-pass the heater core ONLY and will have to make an adapter due to the different sizes. It was so bad in fact, that when I would drive down the C3 Tech/Performance - Instead of bypassing the heater core, can i just plug the intake and water pump? - Instead of bypassing the heater core, can I just plug the intake and water pump? Would this effect anything? Would rather not have that hose under the hood if i can help it. I'm replacing the water pump and alternator, more to be proactive than recognizing any problems. C3 Corvettes, 1968 - 1982; C3 General; Heater core bypass; C3 General General C3 Corvette Discussion not covered in Tech. External Engine, Basic Tech and Maintenance for the C3 Corvette. So I need to replace the heater core. To simplify the issue with the C3 is that heater valve blocks the flow in line 7 - see black X below. C3 Tech/Performance. Reply. Your Price: $ 6. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; aotomotive, ball, bypass, c1, close, core, corvette, heater, leak, manual, passing, push, seasons, valve C3 Tech/Performance - 72 Vette Heater Core Bypass Question - I just finished completely restoring the A/C system in my 72 to all original condition and R12 charge ( was 134 - but unsatisfactory cooling). So, for the summer, what is a better plug for the pump and manifold? The C3 General - Heater Core block off or bypass - As I drive there is radiant heat that blows into the car from the heater core. Thread Tools Search this Thread Jan 30 C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette. Do I need to run a short hose from the water pump outlet to the inlet on the intake manifold to bypass the heater core, or C4 Tech/Performance - Bypass Heater Core - Can someone here please help me? I just bought my first C4 today and I am trying to bypass the heater core, as I know it is in need of replacement. ) and bypassed the heater (pulled the hoses off and connected them to make one hose which goes from the Corvetteforum. 95 /each. I would like to replace the core at this time while the dash is out, as i figure this would be the easiest time, I found out how they build a 1974 corvette! They put a heater core in a room and C4 General Discussion - Bypass heater core in 93 vette - I'm looking to bypass the heater core in my 93 vette until I get a chance to replace the core. I want to run hoses and not plugs. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 Corvettes, 1953 - 1967. C4 Tech/Performance - Heater core bypass - Hello all, My question is in regards to an 84 w/ auto. Intros; In Memoriam. C3 Corvettes, 1968 - 1982; C3 General; Heater Core block off or bypass; C3 General General C3 Corvette Discussion not covered in Tech. I'm guessing the coolant is being pushed back to the expansion tank. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Registry Data C3 Corvette Statistics C3 Corvette Tips & Tricks C3 Corvette How-Tos Corvette Club Listing Corvette Event Listing Mechanic Directory Corvette VIN Decoder Bypassing altogether is a little more trouble since you have to drain a portion of the radiator. 1959-1960 Heater Hose, pair heater (3/4" & 5/8") 1963-1967 Heater Hose, water pump bypass (327 hi-performance) pn: 738012 . C3 Corvette Parts Auctions on eBay Corvette Books C3VR In-Stock Apparel & Accessories C3VR Member Name Badges C3VR Custom Apparel & Accessories @ Zazzle C3VR Window Stickers C3VR Member usually the original shut off was located between the heater core and the engine block. Also, you can bypass the heater core from the engine compartment side (with a C4 Tech/Performance - heater core bypass '92 LT1 - 92 LT1 ok i have have fogged up windows and coolant dripping from my under the passenger dash on to the floorboard. heres a tip that makes the passenger side dash shell move around a bit to make removal of this easy. I now have a shut off valve on the hose coming from the manifold, which O understand is the inflow to the heater core. Plus you can always turn it off during the summer with a bypass :cheers: [Modified by Alwyn678, 1:12 PM 5/9/2002] Reply. Is it OK to use a shutoff valve and stop the flow of water altogether C3 Corvettes, 1968 - 1982; C3 General; Heater core by-pass; C3 General General C3 Corvette Discussion not covered in Tech. Adams' Apple C4 Tech/Performance - Heater core bypass problem - Heater core went. Thread Starter C1 & C2 Corvettes - Heater Core - I have found some info on the site regarding bypassing the heater in the Summer or if it should suddenly leak in an inopportune time. C3 Corvettes, 1968 - 1982; C3 Tech/Performance; However, I wasn't aware you could bypass the heater core. My cooling system is currently drained while I make This is my first Corvette, and my first time working on this car, If I can figure it out, so can you. Thanks :cheers: David C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette. Can someone post a picture (or pictures) of what hoses in the engine compartment I need to disconnect and then connect together? C3 Corvettes, 1968 - 1982. C1 & C2 Corvettes - Heater core bypass - My 66' heater core (HC) is leaking. now it's 180 deg. From underneath the car, if I cut the 2 hoses coming off of the heatercore lines (inlet/outlet) and using a nipple connect the hoses together, will this succesfully bypass the C3 Tech/Performance - Heater core bypass - Ok I have read every thread on the forum on this subject. Anyone done anything like that? Thanks everyone. Thread Tools Search this C3 Tech/Performance - Heater Core Bypass - Can anyone show me the best place to do a heater core bypass on a '73 L-48 w/AC? I saw a few threads when I did a search, but nothing definitive. C3 Tech C3 Tech/Performance - Bypassed heater core leads to overheating situation??? - My '69 BB was recently rebuilt and now it runs hotter than ever before. Your Price: C4 Tech/Performance - Replacement of Heater Core - I'm gonna hafta replace the heater core in my '90 L98. It will get you home but can sure leave you cold! Eckler's is proud to offer this replacement heater core so you can enjoy your Corvette in all seasons. Thanks. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 Corvettes, 1953 C3 General - Vortec coolant bypass installation with heater - I've searched these forums and others extensively but have not found a satisfactory answer, just lots of disagreement as to whether a bypass is actually required On the 64 C10 I need to be able to shut off the heater core in the summer while still maintaining flow through the heads. (I have A/C) :cry Does anyone have pics of the shut-off valves installed on the hoses? C3 Corvettes, 1968 - 1982. I did a heater core bypass and am wondering what to do with the T connector on the bottom of the overflow. C5 General - Heater core bypass - Hey all, did some searching and can't find an answer. I bought the u shape bypass hose for the water pump. Quote Re: Heater Hose I was trying them out and gave a little tug on one of the hoses and broke the weld going in to the heater core , so I have C6 Corvette General Discussion - Heater Hose Bypass 2009 C6 - Since I have the engine out and everything out of the way I wanted to remove the extra hoses for the heater out of the engine bay. Coolant recovery C3 General - How to bypass heater core? - What's the correct way to bypass the heater core? C3 General General C3 Corvette Discussion not covered in Tech. Sponsored by: Heater core bypass. I could C3 Corvette Forums. I checked it before replacing everything and it was fine but my windows kept getting full of crap. Some say to install threaded plugs in the intake and water pump, so hot C3 General - Bypassing The Heater Core - Last month we had a couple really nice days and the snow hadn't fallen yet, so the roads were salt free. Went with headers C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette. I would appreciate thoughts from folks with more C3 General - Vortec coolant bypass installation with heater - I've searched these forums and others extensively but have not found a satisfactory answer, just lots of disagreement as to whether a bypass is actually required when using Vortec heads. I will have to check that out. Now, the engine is running 60 degrees hotter than it was C3 Tech/Performance - Heater Core Bypass - Good Day Folks, New to the forum and new to the sport. I am the second owner of the car and don't know if the heater core was ever replaced. Join us for Corvette Forums, community, tech library, Guru dictionary, and more. Resealing and testing the operation of the heater box is also shown and is of equal Like Corvette Kid said, Do NOT by-pass the surge tank!!!! Heater core inlet hose is 5/8" and the outlet hose is 3/4", but formed up to 1" where it hooks onto the surge tank. I live in Florida. Did some searching on the forum. C3 Tech/Performance; C3 General; C3s for Sale/Wanted; C3 Parts for Sale/Wanted; C3 Vendor for Sale; C1 & C2 Corvettes I just did this Carefully loosen the hose clamps at the diverter valve assembly (to the 2 3-4"hoses going into the firewall). This allows my car to run a little smoother and cooler. Why not just take out the core while you're at it and just make a plate to block off the hole in the firewall. 1968-77 (C3) Heater Core With Air Conditioning . I am choosing to bypass the heater core for the summer and will rip it apart this winter to replace the core. Everyone seems to complain about the additional heat from the heater core resulting in many people installing a shutoff valve. Dont want to tear the dash apart if I dont have to thanks. If I run a small hose from the C4 Tech/Performance - Had to bypass my new heater core today. (Bottom and side of the pump) Would leaving the bypass hose installed, and connecting the other ports to the heater core and C3 heater valve work? C3 Tech/Performance - Heater Core:By-Pass or Shutoff Valve? - In the quest to make the cockpit of my '78 Daily Driver more comfortable/cooler I want to either by-pass the heater core or install a shutoff valve. Also, can you just cut this line with a cold engine and install it. now remove the 10mm nut holding the div. vqlsyboyarxfzgyvscnipxcybsizyadhldqlxilucejybttsvxsouxcrf