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Old 04-09-2012, 05:08 PM   #1
nakedave
 
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Piston clearance question
So, I have question. I have a redtop SR I'm in the process of rebuilding. The block is at the shop right now and they took some measurements for me today to see if I needed to bore the cylinders out. The measurement they got were-
Pistons (Grade 2) - 86.0044mm
Cylinders (Grade 2) - 86.0552mm
Giving me a clearance of .0508mm

The factory specifies that clearance should not exceed .010-.030mm which mine does by .0208mm or .0008in.
My question is would this really hurt me? As long as my piston rings are gapped correctly, it shouldn't really effect performance right?
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Old 04-09-2012, 06:37 PM   #2
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Over bore and the correct size pistons is the only way to make it right. Don't be a cheap ass...
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Old 04-09-2012, 06:46 PM   #3
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Whats the point if rebuilding it if iur trying to cheap out and not due what needs to be done?
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No because I don't want to do another 5 lug conversion.
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Old 04-09-2012, 11:35 PM   #4
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It has nothing to do with being a cheap ass, I'm not sure if I can afford to have the motor bored out and a new set of pistons. I was anticipating just replacing the rings, along with new bearings, HG, gasket set for the motor, etc.
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