Question about 1994 Pontiac Grand Prix

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Water not circulating in 1994 grand prix. changed the thermostat, temp senor and water pump. anything else it could be?

Changed the thermostat, checked water punp and changed the temp sensor

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Hi!
First, are you very sure it is NOT circulating?
You got to know, that with a cold engine it takes often more than 10-15 minutes (while your engine runs on idle) until the thermostat opens and the circulation starts...
So, what I recommend:

1.) Check the expansion container by having the cooling water level
ONLY at the minimum or half an inch under it.

2.) leave it open (cold engine)! (don't screw on the top).

3.) Start your engine and watch both water temp. on dashboard
+ look into the open cooling water expansion container.

4.) If you water temperature will go up to normal on the temperature meter you will see, you will see that the cooling water i
circulating in the expansion container. (You may use a torch to
see it better).

5.a) If it is not circulating + your temperature meter is going up above normal, just shut down the engine and YES, in this case then
you have some more serious problem.

BUT if -->

5.b) you see the water circulating, you do not have to worry. Fill up
the container with cooling liquid between min and max level
(maybe a bit closer to "max") and don't worry until you water
temperature meter doesn't go up above normal.

If this doesn't work, I'd go to a cheaper but experienced mechanic who may know more tips. An official dealership's service often charges 50-100 bucks only for finding the problem..

Hope this helps, it's worth a try for sure...

Posted on Nov 29, 2014

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Flush lines. Probley plugged with debrie...

Posted on Nov 29, 2014

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SOURCE: 2002 pontiac grand prix over heating

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SOURCE: 2002 Pontiac Grand Prix Thermostat

as you face the engine the thermostat bell is on the right (drivers side) Follow the radiatoe hose. Remove the two bolts and raise the bell still attatched to the hose. the thermostat is there with the rubber seal. You can gently pry the thermostat out with a screwdriver or something similar. Put in new thermostat be sure it is the same as the old one, and then replace or change the seal (be sure it is the smae size and thickness as the old one as I got the wrong size from Napa) Then replace the bell, and tighten, but not over tighten. I hope this helps!

Posted on Jan 31, 2009

Shdak
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SOURCE: 1999 Pontiac Grand Prix Overheating

I had trouble with overheating on my 2000 Grand Am, The dealer could not even resolve the issue,(they wanted to replace the intake gaskets)...I knew that was not the issue, no air leaks or water leaking there; so I sit down to think; what are the causes of overheating. Thermostat sticking - nope not it, water circulates, Water leak - nope not it, has water stays until it gets too hot and goes out overflow, fans working - yep...hummmm the only other thing I could think of was losing of water pressure, yep that's it - the cap on the coolant tank was going bad, got a new cap ($8.00) replaced the old one and no more trouble going on 6 months now.

Hope this may solve your issue.

Posted on Apr 08, 2009

beduncan
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SOURCE: 2004 Pontiac Grand Prix OVERHEATING!!!

Have you shop perform a "leakdown test." You probably have a bad head gasket )or a leak in the gasket).

Posted on Aug 06, 2009

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1 Answer

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I had trouble with overheating on my 2000 Grand Am, The dealer could not even resolve the issue,(they wanted to replace the intake gaskets)...I knew that was not the issue, no air leaks or water leaking there; so I sit down to think; what are the causes of overheating. Thermostat sticking - nope not it, water circulates, Water leak - nope not it, has water stays until it gets too hot and goes out overflow, fans working - yep...hummmm the only other thing I could think of was losing of water pressure, yep that's it - the cap on the coolant tank was going bad, got a new cap ($8.00) replaced the old one and no more trouble going on 6 months now.

Hope this may solve your issue.

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