Thread: Knocking noise
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Old 06-20-2008, 01:19 AM
1995lumina 1995lumina is offline
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Re: Knocking noise
if the car heats up and it isnt as loud as it was when its cold then its a piston slap. go to this website for more info http://www.pistonslap.com because gm is famous for piston slaps
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