Re: Fuel System Vent?

Posted by PackardV8 On 2011/6/28 20:32:06

If the knock is at IDLE or just off idle then likely a wrist pin is loose.

Remove one plug wire at a time to see if knock changes significantly.

Put a scew driver to chain cover and listen for loose chain (if it has a chain).

Sometimes on very bellmouthed cylinders the top ring will come up thru the side of piston and cuse a knocking noise but that usualy never goes away.

PULL one plug wire ata time to see if noise changes.