Car over heating
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Joined: Aug 2003
Posts: 9
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From: moreno valley CA
Car over heating
Hi my 1985 is over heating its running about 220-240 with the thermostat in
and 175 - 210 without the thermostat what should the temp be with and without the thermostat please help
and 175 - 210 without the thermostat what should the temp be with and without the thermostat please help
Melting Slicks
Joined: Feb 2003
Posts: 2,770
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From: Construction Sucks! MI
Cruise-In V Veteran
St. Jude Contributor '03 & '05
Re: Car over heating (wrb)
they should max out to the same temp. once the thermostat is completely open (195 degrees on stock thermostats), it's just like having none in at all.
i ususally run around 200 on 90+ degree days around town.
on the expressway about 190.
i ususally run around 200 on 90+ degree days around town.
on the expressway about 190.
Drifting
Joined: Jul 2003
Posts: 1,613
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From: Orlando FL
Re: Car over heating (wrb)
there are a number of things u should check. First, go to tech tips and follow the procedure for cleaning out all the junk between the radiator and the a/c condenser....simple thing if you have ever turned a wrench before...but it will take the good part of an afternoon. i did it last week and it cooled my 85 off by about 10 degrees. while you're at it, i would change the thermo too. lots of people here say to go to a 160* although i dunno what else you have to do to get your car to accept something like that. have fun
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
Re: Car over heating (wrb)
Wait a minute, let me make sure I understand. You say it runs 220-240 with the thermostat in and 175 - 210 without the thermostat? So you mean you pulled the Tstat, checked the temp and then re-installed it and it ran 220-240 again? While it's always a great idea to make sure the radiator is clean, it seems to me that if the only variable that changed was the old Tstat, then the problem is with your old Tstat. I've heard that sometimes they don't open all the way so perhaps the Tstat isn't opening all the way thus restricting coolant flow and that's why when it's in, your temps are higher. But then perhaps my logic is flawed...
[Modified by tobijohn, 4:26 PM 8/21/2003]
[Modified by tobijohn, 4:26 PM 8/21/2003]
Pro
Joined: Aug 2003
Posts: 749
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From: South Boardman MI
Re: Car over heating (tobijohn)
No, I agree. A fully open tstat would reduce flow by only about 5% over none at all. Sounds like its only opening a little bit. Can you still test in boiling water? :iagree:
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Re: Car over heating (wrb)
My 85 runs 168 hiway and 178 city. This car has an 89 engine and trans, after market radiator, fan, thermo. Average temps today 66-72.
Don't run your car without a thermostat. Upgrade your thermostat to a 160 and buy a good after market fan and relay. The GM stuff is meant to run hot.
Also my car has a manual over ride swtich to turn on the fan. This fan cycles even with the air on. Coolest running Corvette I've ever owned.
Don't run your car without a thermostat. Upgrade your thermostat to a 160 and buy a good after market fan and relay. The GM stuff is meant to run hot.
Also my car has a manual over ride swtich to turn on the fan. This fan cycles even with the air on. Coolest running Corvette I've ever owned.
