I was just talking with my neighbor this AM. He has a 2001 Chevy truck with the cold start knock. About 2 + weeks ago, he got po'd and changed the oil in his truck to 10W-40 synthetic. Said he tried all the dealer BS suggestions and the noise never went away. He tried the 5W-30, 0W-30 reg and synthetic for almost 30,000 miles. Every AM it would knock for anywhere from a minute to 10 minutes. Once he installed the 10W-40, it still knocked for about 2 times and all of sudden its not doing it anymore. I was out blowing snow this AM -2 F when he started it up and I never heard any noise at all.
l have to see if this lasts or is a fluke. he told me it has been quite for over a week or so, he uses it every day. He also went with a different brand of oil filter too. He seems convinced the light weight oils are the reasaon for these noise's.
PS-Chevy gave him a 100,000 mile engine warranty for the problem
[ February 10, 2003, 12:20 PM: Message edited by: Mike ]
l have to see if this lasts or is a fluke. he told me it has been quite for over a week or so, he uses it every day. He also went with a different brand of oil filter too. He seems convinced the light weight oils are the reasaon for these noise's.
PS-Chevy gave him a 100,000 mile engine warranty for the problem
[ February 10, 2003, 12:20 PM: Message edited by: Mike ]