I'm with Jerry on this one, sounds like your hearing piston slap. Often when guys rebuild engines they just hone the cylinders to break the glaze and re-ring it using the original pistons. If you have a Stovebolt with over 50k miles on it nine times out of ten there is gonna be .010" to .020" taper in the cylinders, plus some wear at the skirts. No noise with power on, nothing with power off but that spot in between is gonna give you a loud knock.
Rebuilding an engine with 70k on it would most definitely entail a bore job and over size pistons. I’ll bet that wasn’t done if the guy rebuilt it him self.
Denny Graham
Sandwich, IL
Last edited by Denny Graham; 09/30/2010 6:17 AM.
