Heater Core....
Thread Starter
Melting Slicks
Joined: Feb 1999
Posts: 2,473
Likes: 10
From: New Paltz, New York USA
Heater Core....
I have a water/antifreeze drip on my passengers side floor. I know its the heater core leaking, my question is can I just didconnect both heater hoses fron the block and plug the holes until winter time when I can replace the core. Also, does anyone know what size threads are needed to plug the holes where I will be removing the hoses? I will also remove the fuse from the fuse box so the heater/cooling fan does not run for nothing right now.
I have had the 81 for 15 years and have NEVER used the heater and the AC has been removed a LONG time ago. TIA
I have had the 81 for 15 years and have NEVER used the heater and the AC has been removed a LONG time ago. TIA
Melting Slicks
Joined: Aug 2008
Posts: 2,200
Likes: 3
From: Lehigh county Pennsylvania
I believe 1/2NPT threads on 3/4" heater hose fittings and 3/8NPT on the 5/8" hose. But best to remove the existing fittings and take them to the parts store for comparison to new plugs.
I also believe your model has a steel floor. It would be wise to remove carpet/insulation so you don't promote floor corrosion all these many months until you dig into the heater core replacement.
I also believe your model has a steel floor. It would be wise to remove carpet/insulation so you don't promote floor corrosion all these many months until you dig into the heater core replacement.
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
... Also, does anyone know what size threads are needed to plug the holes where I will be removing the hoses?...[
Le Mans Master
Joined: May 2002
Posts: 5,084
Likes: 786
From: Lebanon Township New Jersey
Since the plugs are pipe plugs, you can buy them at Home Depot type stores. You know you're never going to change the heater core.
Thread Starter
Melting Slicks
Joined: Feb 1999
Posts: 2,473
Likes: 10
From: New Paltz, New York USA
i think you are correct, like I said I have NEVER used the heater/AC so I think I will just leave them blocked off. I have changed a heater core in a friends 81 and had to remove the dash, not fun.
Thanks to all for the replys, enjoy the rest of your weekend.
Racer
Joined: Nov 2008
Posts: 326
Likes: 0
BKbroiler,
i think you are correct, like I said I have NEVER used the heater/AC so I think I will just leave them blocked off. I have changed a heater core in a friends 81 and had to remove the dash, not fun.
Thanks to all for the reply's, enjoy the rest of your weekend.
i think you are correct, like I said I have NEVER used the heater/AC so I think I will just leave them blocked off. I have changed a heater core in a friends 81 and had to remove the dash, not fun.
Thanks to all for the reply's, enjoy the rest of your weekend.
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Racer
Joined: Nov 2008
Posts: 326
Likes: 0
I would suggest people replace the core as soon as possible. Many just procrastinate and most don't think about it till it's cold as hell. If you don't know how have it done at a good radiator-a/c shop. It ain't cheap but should be done. It really looks Bubba to see a bypassed core IMPO.
Advanced
Joined: Nov 2009
Posts: 66
Likes: 0
I sure wouldn't want to be a bubba, especially since I live in Reno and think of most of these folks as hillbillies. I did look up a video on YouTube today, and found a good one. Heater core replacement on a '74 Vette, no a/c. Six nuts from the Engine Side of the firewall. I'll have to remove my washer fluid top half, and maybe the wiper door vacuum actuator, but a hell of a lot better than doing the dash route.
Cruising
Joined: Aug 2011
Posts: 10
Likes: 0
1969 Heater Core Replacement - No A/C
I am completing a body off resto on my 1969 350/350hp non air vette.
I replaced the heater core with information obtained from various threads on the internet and found that many owners suggested that it was easier and faster to replace it from the engine bay. I followed in kind and the job was quick and easy. Of course with no air and the body
off the frame, it made for good access. Remove the blower housing and you will see a retaining clip on the left side of the heater core. Be sure to pry it slightly to the left to release the two small teeth that hold it into the heater core frame. Remove the clip and you can remove the heater core starting by gently pulling the left side first then slide it to
remove it from the clip on the outlet side of the heater core.
Hope this helps fellow C3 owners with the same task!
I replaced the heater core with information obtained from various threads on the internet and found that many owners suggested that it was easier and faster to replace it from the engine bay. I followed in kind and the job was quick and easy. Of course with no air and the body
off the frame, it made for good access. Remove the blower housing and you will see a retaining clip on the left side of the heater core. Be sure to pry it slightly to the left to release the two small teeth that hold it into the heater core frame. Remove the clip and you can remove the heater core starting by gently pulling the left side first then slide it to
remove it from the clip on the outlet side of the heater core.
Hope this helps fellow C3 owners with the same task!
I have a water/antifreeze drip on my passengers side floor. I know its the heater core leaking, my question is can I just didconnect both heater hoses fron the block and plug the holes until winter time when I can replace the core. Also, does anyone know what size threads are needed to plug the holes where I will be removing the hoses? I will also remove the fuse from the fuse box so the heater/cooling fan does not run for nothing right now.
I have had the 81 for 15 years and have NEVER used the heater and the AC has been removed a LONG time ago. TIA
I have had the 81 for 15 years and have NEVER used the heater and the AC has been removed a LONG time ago. TIA
Instructor
Joined: Oct 2011
Posts: 138
Likes: 1
From: Point Texas
Look up, heater core by pass AGAIN, in the Search this thread in General and you can see a way to by pass your heater problem until you can fix it. I did it to mine cuts down on the heat too! Hope I explained it right.
Last edited by great68; Aug 8, 2012 at 08:06 PM. Reason: I used wrong info
Advanced
Joined: Nov 2009
Posts: 66
Likes: 0
At JWR11: Thanks for that, it helps as the YouTube video was on a 74 and he didn't have the wiper door vacuum to deal with. It took me a while to get that right, and I don't want to mess with the actuator. Can I ask if you had to deal with that? Thanks from Tony.