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)

5 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

Your Answer:

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