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JL8Jeff · 04-21-2011, 07:24 AM

My old 93 LT1 always had a tap to it. When it started getting a little louder, I knew it was time for an oil change. I ran 20W50 in the summer and 10W40 in the winter, but I also had a supercharger on it and put 42K+ miles on it with the supercharger and never had any problems. I would do an oil and filter change and then see what it sounds like. The LT1's and LS1 engines have piston slap that will go away when it warms up enough. If you didn't run it long enough, it might not have gotten enough heat in it. But I could definitley tell on my LT1 after an oil and filter change that it quieted back down.

04-21-2011, 07:24 AM	#10
JL8Jeff Hippy Mod, Bergermeister Meisterberger, Moderator Join Date: Aug 2004 Location: Ewing Posts: 6,216 iTrader: (3)	My old 93 LT1 always had a tap to it. When it started getting a little louder, I knew it was time for an oil change. I ran 20W50 in the summer and 10W40 in the winter, but I also had a supercharger on it and put 42K+ miles on it with the supercharger and never had any problems. I would do an oil and filter change and then see what it sounds like. The LT1's and LS1 engines have piston slap that will go away when it warms up enough. If you didn't run it long enough, it might not have gotten enough heat in it. But I could definitley tell on my LT1 after an oil and filter change that it quieted back down. __________________ 69 Z28 JL8 4 wheel disc brakes - being restored 09 Silverado Z71 Last edited by JL8Jeff; 04-21-2011 at 07:24 AM.