Mar 20, 2009 #1 P PhilJ New member Joined Jun 18, 2008 Messages 23 Reaction score 0 Points 1 The 4.3 engine knocks when I start it in the morning. The knock goes away after about 10 or 15 seconds. When I turn off the motor and restart it after driving there isn't a knock, it's only in the morning after it has sat all night.
The 4.3 engine knocks when I start it in the morning. The knock goes away after about 10 or 15 seconds. When I turn off the motor and restart it after driving there isn't a knock, it's only in the morning after it has sat all night.
Mar 20, 2009 #2 S SlowWRX New member Joined Mar 20, 2009 Messages 3 Reaction score 0 Points 1 Not sure could be pistons or the rings. Hey if it drives fuck it,
Mar 20, 2009 #3 L LarryE Member Joined May 13, 2008 Messages 85 Reaction score 0 Points 6 If it's a deep loud knock a rod is probably getting ready to let go.