On Fri, 20 Aug 2004, John Hofstetter wrote:
Knurling piston skirts during engine overhaul is an economic way to stop subsequent piston slap.On Aug 19, 2004, at 10:18 PM, Steven Stegmann wrote:Steve,John, I've never done it but have heard of it. Seems like I've seen that in some race engines too. It might cut down on the friction??? Steve
No, it's the other way around. You do the knurling to pistons whose skirts have worn excessively. So, the bumps created by the knurling now contact the cylinder wall.