2000 Oldsmobile Alero knock in engine

2000 OLDSMOBILE ALERO
12,000 MILES • 4 CYL • FWD • AUTOMATIC
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TAG_64
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i have a knocking in the engine. what could this possibly be? thank you
Jan 15, 2010 at 4:25 AM
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BLACKOP555
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what kind of knocking sound is it? a clunk? bang?

when does it occur. cold engine, warm engine?
Jan 15, 2010 at 4:47 PM