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1995 Pontiac Grand Prix 3.1 thermostat gage goes to hot to cool

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It could be your temp sending unit is going weird on you. As long as the radiator is full it shouldn't overheat because the resivoir is empty. So is the engine reallly overheating? If it is loosing enough coolant to overheat and you don't see any leaks, that would be a head gasket. You can check that by taking a spark plug out, there is usually antifreeze on the one where the leak is. or the plug is really clean where the others are dirty.

Posted on Jan 09, 2013

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SOURCE: 1995 Pontiac Grand Prix SE 6v 3.1L running red line hot!

maybe a water pump.

Posted on May 29, 2010

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SOURCE: temperature gage goes from hot to cool on my 1995 pontiac grand prix

check the temp sender unit. The problem indicates a faulty unit or poor connection between the unit threds and the housing. It is best not to use sealent on the threads as this prevents goog contact

Posted on Jan 07, 2013

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What all can cause a pontiac grand prix GT2004 3800series3 to run hot?


Low coolant, bad thermostate, bad cooling fan. Blown headgasket but unlikely unless the car was driven hot.

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1 Answer

Temperature gage goes from hot to cool on my 1995 pontiac grand prix


check the temp sender unit. The problem indicates a faulty unit or poor connection between the unit threds and the housing. It is best not to use sealent on the threads as this prevents goog contact

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I have a 1995 Pontiac Grand Prix SE 3.1 it runs hot , it doesn't over heats. I have replaced the thermastat flushed the Radiator and the fans are operational they comes on automatically. What else can...


remove thermostsat,drill 1/8 hole close to edge,to by-pass steam,common problem....jack-up the front of car toallow any air to purge from system,should be bleeder valve...bolt with a nut...loosen it remove air until antifreeze runs out,retighten bleeder nut,,put car back down....should fix ya

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HELLO I HAVE 1995 GRAND PRIX WITH THE 3.1 MOTOR. MY PROBLEM IS IM NOT GETTING NO HEAT. THE TEMP GAGE GOES TO NORMAL WHEN ITS IDELING WHEN DRIVING GET HOT THEN WHEN I PUSH ON BRAKE OR COME TO A STOP THE...


check the fan and water pump one of these is possibly ur problem when ur at idle there is no heat load and the radiator can dissipate that when ur driving causes more heat if fan isnt working the car wont cool same if problem is water pump at idle pump may be able to move some of the hot anti-freeze but when driving may not be pumping it thru radiator to cool

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yes. but check every thing else first. coolant level being the most important. then the thermostat.

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1995 Pontiac grand prix's temp gauge goes hot


check to see if the electric fan is coming on when it should. Also check coolant level. Also, you may have the beginning of a plugged radiator If all else is OK flush radiator out.

Mar 21, 2009 | 1995 Pontiac Grand Prix

1 Answer

Temp gage reads very low


your thermostat is probably stuck open. does the rad get hot. if this helps please rate me thank joe

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