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usmcchevy · 04-25-2011, 08:51 AM

5.3s and 6.0s are pretty prone to cold start knock. They just knock for the first min or two in the morning. In 03 they started putting a coating on the piston side skirts to help.

04-25-2011, 08:51 AM	#21
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: 5.3l engine knock 5.3s and 6.0s are pretty prone to cold start knock. They just knock for the first min or two in the morning. In 03 they started putting a coating on the piston side skirts to help. __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index