c3 HEAT
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: c3 HEAT (kingdavidrules)
no REAL solution other than the obvious....
seal all air leaks....insulate the carpeting, fix the a/c to good output specs...airflow and such...
use plastic solid t-tops...not those glass things...
try a louvered insert over the back window....that back window is nothing but a lens and passes every bit of heat the sun puts out....bad design, really, not specific to corvette, but any of those bubble back designs....
GENE
seal all air leaks....insulate the carpeting, fix the a/c to good output specs...airflow and such...
use plastic solid t-tops...not those glass things...
try a louvered insert over the back window....that back window is nothing but a lens and passes every bit of heat the sun puts out....bad design, really, not specific to corvette, but any of those bubble back designs....
GENE
Melting Slicks
Joined: Aug 2000
Posts: 2,310
Likes: 1
Re: c3 HEAT (kingdavidrules)
Does the '80 still use the pneumatic heater core shut off (inline valve on heater hose)?
If you've never replaced that, it may be a good place to start.
Some here have replaced their shut offs with a manual valve (there's probably a recent thread if you do a search) which seems to work better than the pneumatic.
Please post a solution if you find one & Good Luck.
If you've never replaced that, it may be a good place to start.
Some here have replaced their shut offs with a manual valve (there's probably a recent thread if you do a search) which seems to work better than the pneumatic.
Please post a solution if you find one & Good Luck.
Thread Starter
Racer
Joined: Jul 2002
Posts: 255
Likes: 0
From: bklyn ny
Re: c3 HEAT (mrvette)
i am not so much concerned with how hot the car is when i first get in it as i am when i am driving it. the heater seems to always be on and at times stronger than others. my legs and feet feel as though i have them in a sauna. the air conditioning had been taken out to facilitate the crate engine and i was told that it wouldnt fit back in. if it was winter i wouldnt mind the heat but durring the summer it is difficult to stay comfortable.
Parrothead
Joined: May 2002
Posts: 48,231
Likes: 289
From: Margaritaville Embassy
St. Jude Donor '08-'09,'13, '14
Re: c3 HEAT (kingdavidrules)
AC? I HATE running the car with tops on. I'd rather be in 100 degree heer tops off than have them off and AC on. I want AC I'll drive the Saturn
Burning Brakes
Joined: Sep 2001
Posts: 1,166
Likes: 0
From: Tulsa Ok
Re: c3 HEAT (Markm10431)
The heater core shutoff valve is vacuum operated by the A/C control. Plumb from main source to have closed all the time, or install manual cutoff. I run the A/C with the tops off and have the best of both worlds. :cheers:
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Drifting
Joined: Jul 2002
Posts: 1,254
Likes: 1
From: Edinburgh
Re: c3 HEAT (kingdavidrules)
Use a wrap on your headers and pipes, better than insulation since it cools the engine bay as well. If you have a laminated rear spring though wrap the pipes underneath it to stop delamination. :cheers:
Advanced
Joined: Sep 2000
Posts: 87
Likes: 0
From: Laredo, Tx USA
Re: c3 HEAT (kingdavidrules)
Check your clutch boot and other possible air leaks on the firewall. Check the transmission boot, and finally air leaks through your A/C vents. You might not feel them in the vents but hot air leaks through the air ducts.
My 74 had all these problems you could not drive it more than one consecutive hour. What a difference.
Homer.
:) :p:
My 74 had all these problems you could not drive it more than one consecutive hour. What a difference.
Homer.
:) :p:
Drifting
Joined: Mar 2001
Posts: 1,514
Likes: 1
Re: c3 HEAT (de_cat55)
Another thing I didn't see mentioned is the hood ledge seal. That will keep out the engine heat from getting into the fresh air inlet just in front of the windshield on the passenger side.
In my case it was a variety of sources; firewall, hood seal, poor sealing at heater doors and coolant moving thru heater core.
Alot of folks have put alot of time and ingenuity into keeping passenger compartment cooler. A functioning AC is probably the best solution overall IMHO.
Scott
In my case it was a variety of sources; firewall, hood seal, poor sealing at heater doors and coolant moving thru heater core.
Alot of folks have put alot of time and ingenuity into keeping passenger compartment cooler. A functioning AC is probably the best solution overall IMHO.
Scott
Burning Brakes
Joined: Jan 2001
Posts: 1,218
Likes: 2
From: Plainfield IL
Re: c3 HEAT (Scott78)
My '81 is hot inside, too. My father bought the car new and I was with him the day we drove it home from the dealer. We both thought it was quite warm inside. I recall my father called the dealer and questioned the heat. The dealer offered to look at the car, but advised 'that's they way the are.'
Switching to a high flow catalytic or using a straight pipe (test pipe) in lieu of the cat will eliminate some of the heat rise from the passenger side undercarriage. As simple as it may sound, the post above that says turn on the AC is about all ya can do.
Switching to a high flow catalytic or using a straight pipe (test pipe) in lieu of the cat will eliminate some of the heat rise from the passenger side undercarriage. As simple as it may sound, the post above that says turn on the AC is about all ya can do.
Team Owner
Joined: Jul 2001
Posts: 61,415
Likes: 478
From: Here to make friends
St. Jude Donor '11, '16-'17
Re: c3 HEAT (Biker)
My '80 doesn't get hot inside unless I turn on the heater. I'll bet the problem is the valve on the heater hose. Either it's not getting vacuum or it's frozen.
