Re: Clunk Clunk Long Shot!
Posted by Kevin Daly on Oct. 16, 1998 at 14:20:25
In Reply to: Clunk Clunk
posted by Paul on Oct. 16, 1998 at 13:37:28
| Hi Paul, Ocasionally we get so involved in and engine adjustment that we don't think outside the box. We're all guilty of it! I've lost many nights of sleep thinking about a similar knock. The engine was just rebuilt but this clunking started and stopped in a very similar fashion to yours. I know it's a real long shot but perhaps you have the same problem I did. It's easy enough to check and doesn't require an engine tear down. My knocking was caused by my crankshaft pully. It is a 2 piece design so it can be removed without lifting the front of the engine. The tolerances on the mating pieces was just large enough to set up a knocking noise at idle. I swore up and down that it was piston slap or rod knock! If you have a 2 piece pully, shine a flashlight down on it and slowly wiggle the fan back and forth. The slight movement of the fan belt will transfer through the pully and you can actually see a slight movement. Even with movement you won't hear a knocking sound. It only happens under load. I removed both pieces and peened the mating pieces until they were tight. Guess What? No more knocking. I know it's really a long shot but you must admit, stranger things have happened and it's simple to check. You dont even need a ratchet! Please keep us up to date! Good Luck, Kevin Daly |
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