1998 grand prix over heating

Asked by Feb 15, 2010 at 07:35 PM about the 1998 Pontiac Grand Prix

Question type: Maintenance & Repair

the top radiator hose gets hot but the bottom one does not. no heat in the car and i have replaced
the thermostat. coolant level is good.

5 Answers


assuming that you are not getting heat from the vent, my guess is that something is blocking coolant flow to or from the heater core (supplies heat for interior comfort)

1 people found this helpful.

when you replaced the thermostat did you burp the system?

5 people found this helpful.

Check your heater core and the water pump. Also, it is possible that there is an air bubble in the system. Pressurize it to clear the air and improve water flow.

2 people found this helpful.

how do you get all the air out or bulp it like you say

4 people found this helpful.

I have the same exact problem. but I replaced the therostat. and the temp still goes up when the car idles. then it goes down when I take off..

3 people found this helpful.

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