Engine Mechanical problem
2003 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic 75,000 miles
The 3.1 in my Grand Prix started makeing a noise that sounds exactly like a sticky lifter at about 70,000 miles. Over the last 5,000 miles it has gotten louder. It is loudest when the engine is cold but can still be heard a little after it warms up. No loss of power, no colland leaks at the intake gasket, no coolant in the oil.
I have read a couple places and pretty sure I even saw it mentioned here that the 3.1 has a known issue with wrist pins. I'm certain I have even seen the GM piston replcement kit for that issue. It's said that this noise issue has been determined to have NO effect on engine performance or longevity.
Yesterday I took the car to my local Pontiac dealer to ask one of the service writers if the noise in my engine was THAT noise. He looked at me like a deer in headlights and said he had never heard of any issues with the 3.1.
Now I am lost and don't know what to think. Any ideas?
Tuesday, April 8th, 2008 AT 4:49 PM