2004 pontiac grand prix

Asked by Mar 10, 2018 at 10:25 AM about the 2004 Pontiac Grand Prix

Question type: Maintenance & Repair

I replaced the thermostat and water pump
on my 2004 pontiac grand prix (non
supercharged) and its still over heating.
What do i do next?

5 Answers

9,225

Bleed the trapped air out of the cooling system. There is a bleeder valve near the thermostat housing. It also seems to help having the car parked facing uphill while you do that, or maybe up on ramps. As long as there's air in the system you will have overheating problems.

2 people found this helpful.
10

did you end up figuring out what fixed it? I have 2004 gtp and when I got it the previous owners had let it get too hot idk how many times and therefore ended up with two blown head gaskets, had to have new heads and one valve was completely burnt. got ALL that fixed and a new radiator, thermostat and it's been back only 3 days on the road and had just a couple more times over heating since... sigh. i've checked the water pump and its fine but i've bled all the air out of the system and hasn't overheated since.

9,225

Sounds like you found the problem. Trapped air in the cooling system is the number one problem people have with these cars by far.

10

I feel like I have it bled out as much as possible, is there anything preventative I can do in the meantime to keep the air out?

9,225

No, once the air is out its out. It gets trapped in their during the refilling process. The cooling system is a fairly tightly sealed system so as long as you don't have a leak you will be good going forward. Just keep an eye on the coolant level for a while since everything is new, but you should be able to just drive it now. If it acts up again, check for air in the system again in case you didn't get it all out.

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 35 nationwide Grand Prix listings starting at $5,490.

Postal Code:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    6,150
  • #2
    munron
    Reputation
    4,620
  • #3
    Dorian Hendricks
    Reputation
    3,320
View All

Find great deals from top-rated dealersTM

Search

Related Models For Sale

Used Chevrolet Impala
18 Great Deals out of 807 listings starting at $2,495
Used Chevrolet Monte Carlo
14 listings starting at $6,990
Used Pontiac G6
94 listings starting at $4,495
Used Ford Mustang
43 Great Deals out of 1,782 listings starting at $4,995
Used Pontiac GTO
3 listings
Used Chevrolet Malibu
41 Great Deals out of 2,642 listings starting at $2,300
Used Chrysler 300
59 Great Deals out of 927 listings starting at $2,800
Used Toyota Camry
46 Great Deals out of 1,436 listings starting at $2,500
Used Honda Accord
53 Great Deals out of 1,903 listings starting at $2,800

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. Content will be removed if CarGurus becomes aware that it violates our policies.