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Re: need help (2/12)
 10/22/19 11:07am
73shark
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Overland Park, KS - USA

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.


Joined: 7/9/2003
Posts: 628

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?



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1973 L-82 4 spd

Re: need help (3/12)
 10/22/19 11:58am
cinorLifetime Member
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, - Canada

Vette(s):
1975 L48 Stingray 1992 LT1


Joined: 12/24/2013
Posts: 408

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



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Re: need help (4/12)
 10/22/19 1:38pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2011

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 (5/12)
 10/22/19 3:01pm
73shark
Standard Member
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Overland Park, KS - USA

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.


Joined: 7/9/2003
Posts: 628

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



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1973 L-82 4 spd

Re: need help (6/12)
 10/22/19 6:04pm
cinorLifetime Member
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, - Canada

Vette(s):
1975 L48 Stingray 1992 LT1


Joined: 12/24/2013
Posts: 408

Yes i did



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Re: need help (7/12)
 10/25/19 8:55am
johnu
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Scottsdale, AZ - USA

Vette(s):
1981 Corvette Two-Tone Claret color, 4 spd, C7 Vert


Joined: 5/23/2007
Posts: 575

Header wrap comes to mind for that side.



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      Only 29 years together
Re: need help (8/12)
 10/25/19 2:30pm
cinorLifetime Member
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, - Canada

Vette(s):
1975 L48 Stingray 1992 LT1


Joined: 12/24/2013
Posts: 408

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



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Re: need help (9/12)
 10/25/19 7:26pm
NorskyLifetime Member
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Twin Lakes, CO - USA

Vette(s):
SOLD - "The Toy" - 1970 Convertible
SOLD - "The Beast" - 1990 ZR-1 (#682)
"BLKBRRD" - 1978 Trans Am, 400ci/225hp, 4 spd, Black w/black interior, Hurst t-tops


Joined: 1/23/2002
Posts: 6885

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.



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Jim Olson 

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Re: need help (10/12)
 10/26/19 8:37am
cinorLifetime Member
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, - Canada

Vette(s):
1975 L48 Stingray 1992 LT1


Joined: 12/24/2013
Posts: 408

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



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Re: need help (11/12)
 10/26/19 10:24am
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 19718

Cindy, first remind us all of what intake/carb you are using.

Are you taking these temps while idling? If so, try checking the temps at 2000rpm as well, and see how they compare side/side. You might be surprised.  Depending on the intake/carb set-up, a lean idle mixture to one side could explain the temp differences. An intake manifold gasket leak would do the same. Post the numbers for each header tube for us, so we can see the difference. If the engine is idling, and running fine, you may be chasing a ghost here.



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Joel Adams
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Re: need help (12/12)
 10/26/19 10:27am
73shark
Standard Member
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Overland Park, KS - USA

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.


Joined: 7/9/2003
Posts: 628

One thing I could think of but cannot think of a reason why it would happen would be that that side is running leaner then the other.



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1973 L-82 4 spd

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