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Old 09-09-2012, 03:56 PM   #1
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Location: Hamilton
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I've just started to pull apart my s52. The pistons are out and I'm now looking into the measurement/hone or bore stage.

On the top of cylinder 3 there is a very slight lip of around 0.001" and on cylinder 4 of around 0.002-0.003".

My question would be, should this be taken care of by an overbore or will a quick cylinder hone be an acceptable route? If a bore was needed, what is the max allowable bore that I can run stock pistons in?

Thanks for the help!


1987 325is(Midnight Tuning Tuned OBD I S52) - Current Summer Car
2013 Ford Edge - Daily Driver
1985 318i - 1st Car (started it all)
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Old 09-09-2012, 08:09 PM   #2
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u can always get over sized rings to fill the .003
piston size is 86.4 i think for s52 u can get one size ring 86.6 if they gotta take more than u gotta get piston

don't wanna risk the lip cause at high rpms it may collapse the the rings

Last edited by BmW1819; 09-09-2012 at 08:13 PM.
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