Why is my car over heating Pontiac grand Prix 2004

Asked by Mar 01, 2015 at 12:04 AM about the 2004 Pontiac Grand Prix

Question type: Maintenance & Repair

I changed my thermostat and my car still
over heats heater no longer works when we
changed thermostat no water came out
when we removed hose to get to the
thermostat??

2 Answers

32,675

You could have simply been low on coolant when you pulled the hose - meaning there may have been a leak in the coolant system. Try doing a pressure test on it, as well as flushing the radiator to see if you get any flow through it. When you run low on coolant or have an obstruction in the core you tend to lose heat inside the passenger area. (The heater core is a mini radiator and works just like the big radiator.) Low coolant levels, bad water pump, bad thermostat, or obstructed heater core can all result in no heat to the cabin. Low coolant, bad water pump, obstructed radiator, blown head gasket, can all result in overheating.

1 of 1 people found this helpful.
21,680

Did you burp the air pocket(s) out of the cooling system with the bleeder valve?

3 of 3 people found this helpful.

Your Answer

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,580
  • #2
    Tom Demyan
    Reputation
    3,170
  • #3
    munron
    Reputation
    2,600
View All

Related Models For Sale

Used Chevrolet Impala
504 Great Deals out of 32,206 listings starting at $1,000
Used Pontiac Bonneville
4 Great Deals out of 406 listings starting at $1,995
Used Pontiac G6
32 Great Deals out of 3,782 listings starting at $1,000
Used Chevrolet Monte Carlo
5 Great Deals out of 1,187 listings starting at $1,125
Used Pontiac Grand Am
954 listings starting at $2,295
Used Pontiac GTO
3 Great Deals out of 391 listings starting at $3,950
Used Ford Mustang
343 Great Deals out of 41,954 listings starting at $1,488
Used Chevrolet Malibu
1,003 Great Deals out of 53,953 listings starting at $1,599
Used Buick LaCrosse
322 Great Deals out of 14,436 listings starting at $500
Used Jeep Grand Cherokee
871 Great Deals out of 71,784 listings starting at $900

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
6 Great Deals out of 379 listings starting at $2,200
2007 Pontiac Grand Prix For Sale
325 listings starting at $4,499
2006 Pontiac Grand Prix For Sale
437 listings starting at $4,000
2005 Pontiac Grand Prix For Sale
314 listings starting at $2,499

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.