Quote:
Originally Posted by tbirdtbird
3 & 4 run hotter than others=more expansion of piston
pistons set up with too little clearance=scored pistons and scored cyl walls 3, or 4, or both
see it all the time
no matter what anyone tells u, pistons must be clearanced at .0035
this is especially so if using old school long skirt pistons
but we use .0035 even on short skirt 283 style pistons
valve stem may have been slightly off even when new from the sounds of it
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Tbird, I have read and heard about that .0035 clearance for a couple years. The pistons I got from Snyder's specify .003, which is what my rebuilder used. But you worry me, so I have some questions: is this .0005 difference determined by the bore and honing process? I've got about 1500 miles on my rebuild. How soon after my rebuild should I expect problems? What should I do now before a problem arises? Should I tear it down for five ten-thousandths, and how would that diffence be corrected? Could it be done with the engine in the car?
In short, how serious is this at this point in my rebuild?