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clinebarger · 11-17-2011, 10:48 PM

Very common on all LS based engines, I think the 5.7L & 6.0L are the loudest.
I had a 5.7 aluminum LS1 that sounded like it was going to come apart on cold starts, But never did even with my lead foot & a supercharger. So dont worry about it.

11-17-2011, 10:48 PM	#2
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: piston slap? Very common on all LS based engines, I think the 5.7L & 6.0L are the loudest. I had a 5.7 aluminum LS1 that sounded like it was going to come apart on cold starts, But never did even with my lead foot & a supercharger. So dont worry about it.