Overheating

Asked by GuruBX1B4 Dec 23, 2018 at 05:10 PM about the 2004 Pontiac Grand Prix GT1

Question type: Maintenance & Repair

My vehicle was not overheating untill I changed the
thermostat. Any ideas as to why this happened?

3 Answers

65,590

Air in system bleed air from system like this remove cap from overflow tank fill with antifreeze to full mark leave cap off and start vehicle and let idle you will notice level in tank start to rise this is normal once thermostat starts to open level in tank will drop add more antifreeze to full mark then put cap back on.

1 people found this helpful.
18,715

Then use the bleeder valve next to the thermostat to bleed of any remaining trapped air. This whole process works better if the car is parked facing uphill.

2 people found this helpful.
159,355

Either has air in the system or the thermostat was installed backwards.

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