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Topic: need help

in Forum: C3 Engines

need help

Posted: 10/22/19 4:53am Message 1 of 12
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Canada
Joined: 12/24/2013
Posts: 414
Vette(s): 1975 L48 Stingray 1992 LT1

So I have only drove my car a few times but the heat on engine on passenger side is way hotter, with some spots being even hotter than others on same side, looking for suggestions




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Re: need help

Posted: 10/22/19 8:07am Message 2 of 12
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 914
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day. 2023 Accelerate Yellow HTC Stingray

You said some spots are hotter than others. Are you using an IR temperature sensor? Not sure what year your Corvette is but it could be a partially or fully plugged catalytic converter causing the heat. Is the heat riser functioning properly?




1973 L-82 4 spd

Re: need help

Posted: 10/22/19 8:58am Message 3 of 12
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Canada
Joined: 12/24/2013
Posts: 414
Vette(s): 1975 L48 Stingray 1992 LT1

All that has been removed, engine completely rebuilt now has headers




Re: need help

Posted: 10/22/19 10:38am Message 4 of 12
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Equinunk, PA - USA
Joined: 10/31/2007
Posts: 2465
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Did you replace the foil covered tunnel insulation under the body and over the transmission? Also there is a foam insert you can squeeze between the firewall and top of the bell housing. Does a great job on my 72' for heat. No headers on mine, just stock.




Re: need help

Posted: 10/22/19 12:01pm Message 5 of 12
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 914
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day. 2023 Accelerate Yellow HTC Stingray

You can have the headers coated by Jet Hot and that will eliminate a lot of the heat under the hood.




1973 L-82 4 spd

Re: need help

Posted: 10/22/19 3:04pm Message 6 of 12
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Canada
Joined: 12/24/2013
Posts: 414
Vette(s): 1975 L48 Stingray 1992 LT1

Yes i did




Re: need help

Posted: 10/25/19 5:55am Message 7 of 12
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Scottsdale, AZ - USA
Joined: 5/23/2007
Posts: 617
Vette(s): 1981 Corvette Two-Tone Claret color, 4 spd, C7 Vert

Header wrap comes to mind for that side.




      Only 34 years together

Re: need help

Posted: 10/25/19 11:30am Message 8 of 12
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Canada
Joined: 12/24/2013
Posts: 414
Vette(s): 1975 L48 Stingray 1992 LT1

I am wanting yo find out why it would be, havent check for possible vac leak yet and also possible valves on that side might need more adjustments, not sure, gotta be reason why its that way




Re: need help

Posted: 10/25/19 4:26pm Message 9 of 12
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Burke, VT - USA
Joined: 1/23/2002
Posts: 7280
Vette(s): SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
Sold - "BLKBRRD" - '78 Pontiac Trans Am
"BLUBYU" - '04 Coupe

Going out on a limb here - but is it possible that there are some blockages in the water jacket passages on that side?

Had overheating issues with the '28 Model A when we were getting it running again after a 30+ year slumber.  A thorough flushing of the block did force out a bunch of crud but evidently not enough, a rebuild of the water pump didn't fix it neither did a new radiator.  It wasn't until the head was pulled that we discovered crud blocking several of the water jacket passages.  A combination of air pressure and water pressure cleared out a bunch more crud and after getting everything back together it never overheated again.




Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

Re: need help

Posted: 10/26/19 5:37am Message 10 of 12
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Canada
Joined: 12/24/2013
Posts: 414
Vette(s): 1975 L48 Stingray 1992 LT1

The car is running fine for most part, it is not overheating, when using heat gun on headers the passenger side is way way hotter than drivers, and its puzzling me as to why




in Forum: C3 Engines


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