Question about 2002 Pontiac Grand Prix
Car temp gauge went up, car overheated, had Flush & Fill service, now Temp gauge goes all the way up, Ar 2000 Rpm, Temp gauge goes down to 195, then goes up and down when u accelerate, the heater is giving very little heat, then changes to all cold air. No apparent leaks, engine steam clean, antifreeze is fine, The miledge is 80,000, owner never had cooling system FLUSHED until NOW! Checked oil,seems fine no milky substance. The temp gauge goes up and down, no sign of overheating, also no heat from heater, changed to cold air. Help, I need heat this week is going to be 21 Degrees very cold, thank you.Motor is 3100 V-6, automatic,Pontiac Grand Prix.
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Posted on Jan 02, 2017
It is probably the problem. To make shure that need to change the gaskets, one of the symptoms use to be thet the temp rises when you are running at speed 50+ average, where is supposed that the car gets a lot of air due by the speed and nobody thinks that will be overheated.
Posted on Nov 19, 2008
Okay. warm up vehicle, get radiator hoses hot. Turn on heater, fan on low. Grip both rubber heater hoses close to the firewall, from the engine compartment side. They should be too hot to hold for long. If they are not hot, then you have a lack of coolant circulation to the heater hoses. If they are hot then access heater core, behind glove box area. Blend door which moves as you chose HOT or Cold, should be cable controlled, move the controls and be sure the door is actually moving. Keep me posted
Posted on Dec 17, 2008
Are you sure you got all the air out of the cooling system? Air pockets are very common problem when you do any work to the cooling system. An air pocket will do what you discribe.
Posted on Mar 18, 2009
The first solution sounds like that might be the problem if you have trans fluid in the coolant reservoir. If you have oil in the coolant reservoir then this is normally caused when you have a crack in the intake manifold or if the gasket has gone bad. You can either pull the intake manifold off and replace the gasket and check for any cracks in the intake manifold. You may not see the crack. If you do find a crack in the manifold the best thing to do is replace it, change the gasket and then flush out the radiator.
Posted on Apr 11, 2010
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