I have a 2003 Silverado 1500HD with the 6.0
Mine has a slight knock on cold starts, mostly under load and only in the winter. If I let it idle for about 60 seconds, the sound goes away completely.
I am running M1 5w30. I have not tried any other oils yet, cause my engine likes the M1, no useage etc.. I have heard from someone else on this forum that the castrol start up solved his piston knock, but have not tried it myself.
When I bought the truck, I heard that the 2003's had slight modifications to the engines to help muffle the pistion slap (not cure it or prevent it). That's what mine sound like.
This winter I am running FP in every tank to see if it helps. Should know when the temp go below 0!!
[ December 01, 2004, 01:39 AM: Message edited by: Ross ]
Mine has a slight knock on cold starts, mostly under load and only in the winter. If I let it idle for about 60 seconds, the sound goes away completely.
I am running M1 5w30. I have not tried any other oils yet, cause my engine likes the M1, no useage etc.. I have heard from someone else on this forum that the castrol start up solved his piston knock, but have not tried it myself.
When I bought the truck, I heard that the 2003's had slight modifications to the engines to help muffle the pistion slap (not cure it or prevent it). That's what mine sound like.
This winter I am running FP in every tank to see if it helps. Should know when the temp go below 0!!
[ December 01, 2004, 01:39 AM: Message edited by: Ross ]