03 Pontiac Grand Prix 3.8 Coolant system problem

Asked by Jun 17, 2018 at 08:20 PM about the 2003 Pontiac Grand Prix

Question type: Maintenance & Repair

Coolant coming out exhaust. Sputtering bad .. Oil
is fine (no sign of coolant)

6 Answers


Head gasket is leaking into the cylinder but not into the oil. No so unusual. You can save money now by parking it until repaired. Good luck!

1 people found this helpful.

Cars parked! Is it just the intake gasket? Or something warped?


It could be a number of things but more than likely just one of the gaskets. If you haven't driven it while it was overheating it shouldn't be warped, just needing new gaskets and a good clean-up.


Drain the coolant and remove the spark plugs, crank the engine over until no more coolant blows out the plug holes, if the coolant blows out the plug holes on the each end it could be intake manifold but if it blows out the middle plugs then it is more likely headgaskets or a cracked head, then squirt some oil into each cylinder and spin the engine over again and put the plugs back in, this will keep the corrosion at bay until you find time to tear it down.

1 people found this helpful.
Best Answer Mark helpful

Thanks for the points

1 people found this helpful.

Need more help!. I put in a new motor (same) and trans(malibu,I believe ,which I was told was compatible) the trans has a dif shifter box on top(2 wire harness spots)(original has 1) I tried just switching the box to fit my 1 wire harness! The wheels are still spinning free! What are my options

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 43 nationwide Grand Prix listings starting at $5,992.

Postal Code:

Pontiac Grand Prix Experts

  • #1
  • #2
  • #3
    Dorian Hendricks
View All

Related Models For Sale

Used Chevrolet Impala
39 Great Deals out of 996 listings starting at $1,950
Used Pontiac GTO
4 listings
Used Pontiac Firebird
18 listings starting at $9,995
Used Chevrolet Camaro
16 Great Deals out of 1,036 listings starting at $11,495
Used Chevrolet Malibu
56 Great Deals out of 1,893 listings starting at $1,999
Used Ford Mustang
32 Great Deals out of 1,584 listings starting at $3,999
Used Pontiac Grand Am
18 listings
Used Chevrolet Silverado 1500
96 Great Deals out of 9,333 listings starting at $4,900

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.