Mechanics

KNOCKING AND SQUEALING NOISE

2003 Pontiac Bonneville • 160,000 miles

2003 pontiac bonneville se (not supercharged)
I have a knocking noise coming from the rear of the enging. I have tried letting up the tension on the belt but the noise did not go away. Now the weird part I have a loud squealing noise coming from the bottom portion of the engine. Whats weird about it is when I pull the dip stick out and it sucks air into where the dip stick goes the noise stops completely. Im stumpped please help!
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Tylerscottstivers
September 29, 2012.



You have something wrong internally. It could be a bearing or a piston.

Did you run it low or out of oil?

Roy

ASEMaster6371
Sep 29, 2012.