1995 Chevy Corvette runs hot with AC on

Tiny
BELLA929
  • MEMBER
  • 1995 CHEVROLET CORVETTE
  • V8
  • 2WD
  • MANUAL
  • 119,000 MILES
My problem is that when I drive it with the a/c off it cools between 174 and 190 when I turn on a/c it rises to 228 and hotter I turn it back off before it gets any hotter this is in traffic on highway its ok it started while driving downtown savannah ga in bumper to bumper traffic I looked down and my gauge was at 257 I immediatly got out of traffic hit a back road turned on the heater and got it cooled down. Next day changed coolant took out thermostat put in boiling water it opened and closed properly no warnings or codes came on. When added coolant it did take two gallons of 50/50 bled the thermo housing any ideas
Sunday, July 26th, 2009 AT 1:53 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Check to see if cooling fans are comming on. Should be on with AC and at @190 temp
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Sunday, July 26th, 2009 AT 2:13 PM
Tiny
BELLA929
  • MEMBER
  • 2 POSTS
Yes both fans are running, how hot should I let it get before I shut off a/c to bring down temp today I let it get to 242 but turned off a/c temp came back down also took compressed air and blew out a/c condensor and raidator fins any other ideas
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Monday, July 27th, 2009 AT 8:42 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
My experiences with the problem your having has been partial blockage of cooling tubes in lower part of radiator. I live and work in FLA and this is a common problem. Know rad hard to get to but feel the core towards bottom if cooler than top then blockage.
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Tuesday, July 28th, 2009 AT 9:31 AM

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