I have a over heating problem with my Pontiacgrand prix 2003 I have took off the thermostat and it will run fine bought a new one and put it on and it runs hot, Punt coolant in it and didn't help. what else could it be please help.

Asked by Nov 15, 2014 at 09:43 PM about the 2003 Pontiac Grand Prix GT

Question type: Maintenance & Repair

2 Answers

1,185

Make sure that you have the thermostat installed in the correct direction, and after checking that you have to bleed all of the air out of the cooling system. (a rather lengthy procedure but necessary)

yeah-checklist-thermostat installed with cone side down. no leaks. bleed or burp the system. i recommend flushing it with the heat on before any of this. its cheap and it never hurts. make sure your thermostat is the right temp. prolly 185 or so for your car. make sure its the right coolant or universal. make sure fans are working right. that should be it. if all those things are done you should be ok. if not its time to start thinking gaskets somewhere. and p.s. every grand am or grand prix ive ever seen will run a little warmer than most cars at idle and under heavy load or in the heat. hooe this helps

Your Answer

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,470
  • #2
    Tom Demyan
    Reputation
    3,110
  • #3
    munron
    Reputation
    2,510
View All

Related Models For Sale

Used Chevrolet Impala
587 Great Deals out of 34,414 listings starting at $900
Used Pontiac Bonneville
486 listings starting at $1,799
Used Chevrolet Monte Carlo
10 Great Deals out of 1,245 listings starting at $999
Used Ford Mustang
612 Great Deals out of 39,251 listings starting at $1,895
Used Pontiac GTO
6 Great Deals out of 447 listings starting at $4,995
Used Pontiac Grand Am
1,079 listings starting at $1,500
Used Chevrolet Malibu
1,091 Great Deals out of 62,139 listings starting at $880
Used Chevrolet Camaro
460 Great Deals out of 31,468 listings starting at $1,450
Used Pontiac Firebird
9 Great Deals out of 767 listings starting at $4,000
Used Jeep Grand Cherokee
1,091 Great Deals out of 72,248 listings starting at $1,195

Used Cars For Sale

2007 Pontiac Grand Prix GT For Sale
60 listings starting at $2,295

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.