I want to throw this idea out here. Has anyone ever heard of an engine builder "refreshing" an engine, and in doing so, honing the cylinder walls .002" then reinstalling the pistons with new rings?

If so, would this extremely adversely affect the engine?

I have a feeling this may have happened to me..

Matt

That's done all the time. If you have an engine that needs to be rebuilt, but stil has very smooth cylinder walls, then they will hone it out. There aren't negative effects to this as far as I know. Seems like I might have missed the question though, because to me it seems like you answered your own question. :confused: Over sizing piston rings is normal. I mean when running nitrous people use all different size rings......with a variance of more than .002". Hope this helps.

The guy who is doing my cam swap says he can "hear" my pistons slapping the walls, and said that when the engine was rebuilt, he should have bored and honed to .010 or more after asking over, and told me I needed new pistons.

he said .002 is too much to go over, because its .002, plus whatever piston to wall there was before, and that eventually my piston skirt will break because of this.

yes/no? overcautious person?

what?

Thanks..
matt

Unless it had too much clearance to start with .002 is not going to hurt a thing.
We typically run marine engines with an extra .001-.0015 depending on bore size
When you buy aftermarket pistons they usually give you different clearance recommendations depending on application.
It is not the best way to build an engine but I highly doubt you will break skirts off because of an extra two thou. ;)
And just for info, you might tell your "guy" unless he is into ordering custom pistons the first oversize is .020 not .010 :D