Overheating

Tiny
JOYMARTIN
  • MEMBER
  • 2003 PONTIAC GRAND PRIX
  • V8
  • FWD
  • AUTOMATIC
  • 127,000 MILES
I HAVE A 03 PONTIAC GRAND PRIX. FOR THE LAST TWO WEEKS THE TEMP GAUGE HAS BEEN GOING UP BETWEEN 210-220 AND LAST NIGHT THE TEMP LIGHT CAME ON. THE TEMP GAUGE HAS BEEN MOVING UP AND DOWN ALSO. THERE IS A STRONG SMELL OF COOLENT FROM THE WHERE THE DASH BOARD AND ENGINE MEET. IT IS ALSO LEAKING BUT CAN'T TELL IF IT IS OIL OR COOLENT. IS THIS A BAD WATER PUMP OR HEATER CORE?
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Friday, April 8th, 2011 AT 2:20 PM

2 Replies

Tiny
WRENCHTECH
  • EXPERT
You do have a leak but I doubt it's a water pump in that area. You need to pressure test the cooling system and find the source of the leak. Don't drive it this way as this engine will blow a head gasket in a heartbeat if it gets too hot.
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Friday, April 8th, 2011 AT 3:48 PM
Tiny
FREEMBA
  • EXPERT
Sounds like a heater core problem. Check the carpet on the floor of the front passenger side as close to the firewall as possible. If it's wet chances are its the heater core. The guage has been moving up and down because the cooling system low on water an the guage can't get an accurate reading.

You can find info with picture for changing the heater core (if is is deemed necessary) at the following website:

Try www. Autozone. Com for the step-by step guide along with pictures for this procedure.
Once at the site identify you car under the heading "current Vehicle"
Next click "Repair Info" on the tabs below the AutoZone logo.
At the middle of the page go to "Your Ride, Your Guide" and click "Become a member" set you username and password
Log-in and click "Vehicle repair guide"
Select the category for the repair needed.(HEATING & AIR CONDITIONING)
Select (on the left) type of repair needed. (HEATER CORE)
Page opens to your repair info.
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Friday, April 8th, 2011 AT 4:56 PM

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