1998 temps running high
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3rd Gear
Joined: Sep 2014
Posts: 3
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1998 temps running high
it use to run around 196 - 205. now it runs around 200 at idle when running it goes between 220-230 at 60mph above that it goes to 240+
changed radiator, water pump ,thermostat and fluid. any ideas whats wrong?
changed radiator, water pump ,thermostat and fluid. any ideas whats wrong?
Drifting
Joined: Dec 2011
Posts: 1,422
Likes: 118
From: San Gabriel Valley California
St. Jude Donor '14-'15
I work hard to keep my car clean and nice. Even blowing out the radiator. But recently, we had it up on a lift for another thing, and decided to blow out and clean the area around the condensor and radiator.
I was amazed, at how much stuff (twigs, pieces of leafs, etc) which came out, just since the last time I cleaned it.
This should be your first attempt to lower operating temps. These things are really bottom feeders, live vacuum sweepers of crap laying around on the ground, as we drive. For me, I learned I need to do this more often, than I did before. I drive mine daily, so it is necessary. Live, and learn.....
You could have air trapped in the system, too. Others more knowledgable about that than I, will comment most likely, about how to check that. But you have to 'burp' the system.
Don
I was amazed, at how much stuff (twigs, pieces of leafs, etc) which came out, just since the last time I cleaned it.
This should be your first attempt to lower operating temps. These things are really bottom feeders, live vacuum sweepers of crap laying around on the ground, as we drive. For me, I learned I need to do this more often, than I did before. I drive mine daily, so it is necessary. Live, and learn.....
You could have air trapped in the system, too. Others more knowledgable about that than I, will comment most likely, about how to check that. But you have to 'burp' the system.
Don
Last edited by donald4972; Sep 9, 2014 at 10:17 AM. Reason: spelling
Team Owner
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Fans only run at speeds below 35mph. Since temps are elevated at 60+mph, I don't think that is the major problem.
I would burp the system. More likely air in the cooling system. I can never get mine properly burped with the shop manual procedure but this one works every time. At least for my car...
http://forums.corvetteforum.com/c5-t...erheating.html
I would burp the system. More likely air in the cooling system. I can never get mine properly burped with the shop manual procedure but this one works every time. At least for my car...
http://forums.corvetteforum.com/c5-t...erheating.html
Melting Slicks
Joined: Sep 2011
Posts: 2,258
Likes: 543
From: Appleton WI
OP for clarity. Did you replace all of the items and now have the high temps or did you replace the items because of the high temps? Being that you replaced all those components, you likely have air in the system. It is important to know if the problem existed prior to the new parts to determine if you have another problem.
Team Owner
Joined: Jul 2006
Posts: 22,182
Likes: 4,178
From: Kannapolis NC
If it will sit and idle at 200 degrees, it ain't the fans. And as 8vette7 said, the fans are programmed off at speeds above 35. Idle will quickly take the temp over 225 without the fans. I'm betting the guys are right who say air in the system.
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Team Owner
Joined: Jul 2006
Posts: 22,182
Likes: 4,178
From: Kannapolis NC
Take a look at this thread. One other important factor that would make it idle ok, but hot at speed: Is you center airdam in place to direct the air into the radiator at speed?
https://www.corvetteforum.com/forums...help-asap.html
https://www.corvetteforum.com/forums...help-asap.html