2000 Malibu 3100-117k upper engine noise

JoeG

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Nov 16, 2006
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How would I tell if the knock is lifters (roller lifters) or piston slap that I am hearing. Does quiet down some when engine warms up.
 

Jim Davis

Hero Member
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Nov 17, 2006
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There is no valve lash or adjust ment on these things, so best is probably just a mechanics stethascope, listen at the rocker cover and at the side of the engine carefully to try and hear just where the noise seems to be coming from.
 
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