2002 Pontiac Grand Prix Q&A
2002 Pontiac Grand Prix Question: Coolant problems and sluge in motor. Any ideals?
I bought this car new in 2002. It has 154,000 miles on it. I have always ran 10-30 synthetic valoline oil in it since day one and have changed oil and filter every 3000 to 5000 miles and still have sluge in the motor. When i take the oil cap off it has yellow gunk stuff up around cap. What could possible be going on with this motor. Has far as the coolant problems, the motor does not over heat but, wants to use coolant every 2 or 3 weeks of normal driving. It wants to spray coolant all over the belt and battery on the right side of motor and notice some steam around top radiator and i have black soft flakes in the coolant. Also on the left side motor i ntoice water on top transmission. I have replaced water pump and heater valve tubes and flushed out coolant and replaced with new coolant. Sorry for length message. Thanks! - rocket0071r
Most likelly the intake manifold gasket needs to be replaced. The gasket kit cost around 80-90$ and takes about 2-3 hours to replace. - euromech
DO NOT DRIVE THIS CAR ANYMORE! If you do you will be putting an engine it. You need to verify where the coolant leak is. That is done with a pressure tester. Sluge is not based on the oil cap deposits. Keep using synthetic lubricant. I would use 5-30 instead of 10-30. - PARTS GUY
you could have blown head gasket I would pressure test cooling system and pull spark plugs out then crank engine over and see if any anti freeze blows out the cylinders - goodguy