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7/23/16 8:34pm - Original Message: 'Overheating at over 60mph'
Red C3
Former Member
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Chalmette, LA - USA

Late 1976

Joined: 7/23/2016
Posts: 1
I have a C# with a rebuilt motor, 350 20 over W/ flat top 10to1 pistons small cam 268 I believe, and alum heads I bought of of ebay Pro MAXX I also took the scroud and fan off and installed a Dewitts alum radiator w duel electric fans seems like all the air is going under car HELP |frown|

Question: My C3 Corvette Overhearing over 60MPH

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1. Why is my car overheating over 60MPH
2. Why is my car overheating over 60MPH
3. Why is my car overheating over 60MPH

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7/24/16 12:32am - Reply: 'Re: Overheating at over 60mph'
stingrayjim jr Lifetime Member
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1976 L48 auto

1978 L82 4speed

1994 LT1 6speed

Joined: 7/5/2002
Posts: 3942

Could be a few things.... maybe an air bubble in the system, bad temp sender, water pump, check the electric fans and make sure they are blowing the correct way(if mounted in front of the radiator they should blow through toward the engine, if mounted on the back of radiator they should suck air through..... 

you might have to do a little more research on your car to give us some more information.

NCM Lifetime Member #1936

Stingray's '76                             StingrayJr's '78                           Lil Red '94

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7/24/16 11:37am - Reply: 'Re: Overheating at over 60mph'
F4Gary Gold Member
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Grapevine, TX - USA

1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 943
Is this a poll?

With a DeWitts rad and cooling fans, you should have plenty of cooling capacity.

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7/25/16 7:50pm - Reply: 'Re: Overheating at over 60mph'
Standard Member
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Germansville, PA - USA

1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats. . 1999 Covertible, 6 speed, Atomic orange, Oak interior

Joined: 1/28/2010
Posts: 785
Is your air dam under the front bumper there?


Dan T

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 Forums -> C3 Cooling and Heating Systems
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