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HELP!

Tiny
B_LOCO83
  • MEMBER
  • 2003 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
JUST REPLACED MY THERMOSTAT ON 03' PONTIAC GRAND PRIX AND IT KEEPS HEATING UP ON ME AND LAST NIGHT IT STARTED OVERHEATING AND THIS MORNING THE THERMOSTAT STARTED WORKING BUT IT OPENS UP FOR A COUPLE OF SECONDS THEN IT WILL CLOSE AND IT KEEPS REPEATING ITSELF
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Tuesday, February 1st, 2011 AT 1:50 PM

3 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What is the temp reading? Is it boiling over? How do you know the thermostat is opening and closing for a couple of seconds? Maybe the fan is turning on and off?
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Tuesday, February 1st, 2011 AT 3:22 PM
Tiny
MAYNARDMAN
  • MEMBER
  • 9 POSTS
First off I would make sure the thermostat is good. Pull it out and put it in a pot of water and heat it till it opens, use a thermometer to check when this happens. It should be 190 -195 degrees. If the thermostat checks out I would next check your water pump for circulation and makes sure the rotation is correct. While checking your water pump also check the belt for tension.
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Monday, March 14th, 2011 AT 4:28 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Good job.
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Wednesday, March 16th, 2011 AT 7:45 PM

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