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tim0321
New User
Nov 17, 2009, 6:32 PM
Post #1 of 2
(2202 views)
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1995 grandam overheating
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question no.01: i have a 1995 pontiac grandam w/ a 4cylinder engine and has approx.97,000 miles on it; it started about 4 months ago when the car according to the gauge was overheating, so we took it to our local shop, and they called and said the temp.sending unit was bad, and of course we said fix it. after getting it back within 2-3 days it started doing the same thing. we took the car back in, and after doing many tests, they called and said that according to their computer the temp.was running where it should so most likely the gauge was bad but it would not harm the car if we drove it like that. so reluctently we drove it for another month or so and we started leaking antifreeze;after taking it back to the same shop, they called and said the radiator had a hole in it, but reluctently we let them replace the radiator.to this day the car according to the gauge is overheating, and when you turn the heater on you can smell antifreeze in the cab, however it does not matter whether or not the heater is on, it still overheats, again according to the gauge
question no.02: all of my gauges on the dash are junping, sometimes the speedomter goes to zero other times it works. sometimes the rpm gauge goes to zero other times it works.oil gauge jumps, battery gauge jumps, gas gauge jumps, is there a main gauge or fuse or? that would fix this? other then above car runs great wouldnt trade it for the world.
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Loren Champlain Sr
Veteran
/ Moderator
Nov 17, 2009, 7:08 PM
Post #2 of 2
(2199 views)
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Re: 1995 grandam overheating
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tim; First, for the temp guage and the coolant temp sensor for the computer to get accurate readings, the cooling system must be completely full and purged of air. Just like you would bleed brakes. If there is an air pocket around the sensors, they won't be able to give the guage or the computer the correct information. With the other issues that you mention, it sounds as if you may have an electrical (probably ground) problem with the instrument cluster, itself. The actual engine temperature can be tested with a pyrometer, which I'd recommend doing, to be certain that it really isn't overheating. The smell you are getting in the cabin may be from the heater core leaking. When engines overheat, they will cause excessive pressure in the system. If the heater core is weak, it could start leaking. Any film, or fogging, on the windshield? Moisture on the passenger side carpet?
Loren
SW Washington
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