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Old 03-31-2009, 11:08 AM   #3
Josh
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Join Date: Dec 1999
Location: Rockwell, NC
Posts: 6,508
Re: Yukon knocking noise?

Sure it's not piston slap? What kind of oil are you running in it? These motors have very short pistons with low tension rings which allows for some piston slap when cold. How often are you changing the oil? Is it using any?
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