Reply to "Piston clearance"

I'd get some professional help to measure this. At 0.006" clearance, brand-new rings won't last long before youll be pumping oil overboard at a rapid rate. Also note that cylinders wear to a taper, so unless the engine has been recently honed straight, preferably with a torque plate, you'll get a different measurement close to the top of a given bore where wear is greatest, and half-way down where wear is much less.Another way that works on blocks is to use a piston to shove one of your new rings down the bore about an inch, then use feeler gauges to measure the end gap. Ring length x pi = bore diameter. Try it again 3" down; if theres taper in the bore, the readings will be different. The piston is used to guarantee the ring is square in the bore. Surprisingly, I found it takes some practice to get the feel for accurately measuring things with either inside or outside micrometers. Once things are to a professionals liking, try your mic's again, until you get the same answers he did, with his mics. This will quickly give you the "feel" & is cheap instruction IMHO, and does'nt delay assembly much. Note there are no trophies for fast assembly of an engine, only for correct assembly. It takes pro Winston Cup builders over a week to assemble a race engine. Take your time.