I hate to be the one to tell you this but what you are describing sounds a whole lot like a connecting rod bearing that has worn out. Has your oil pressure dropped any? When you pulled the plug wire you took the load off that rod and the knock stopped.
Does the knock seem to come from the lower part of the motor? Try using a piece of hose as a stethoscope and see if you can zero in on just where the knock is coming from. But it really sounds like a rod bearing to me. Sorry :cry:
Thursday, May 10th, 2007 AT 8:49 PM