Originally Posted by SOMbitch

A little PS or CSK (cold start knock) as it is sometimes referred to hurts nothing in these motors. My 98 LS1 has none at all. My 196K 5.3 LM7 in the truck has had it since I bought at 87k and has no change in noise or oil consumption. It has always used about a qt. at 3k and never more and still runs like the day I bought it in 01.