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Re: B23 piston fit-the rebuild continues... 700 88

posted by  someone claiming to be Peter on  Wed Dec 6 14:01 CST 2000 [RELATED]

How long is a piece of string? Seriously, without rings the piston should slip into the bore easily, when it is at the top of the bore you should't be able to significantly rattle it about in the bore. Without measuring, which your machine shop should have done, it is impossible to really describe it. However one crude way of telling, and you should do this anyway, is to measure the ring gap. Put the ring in the bore and push it into the lower part of the bore with an upside down piston. Then measure whether the gap between the ends of the ring meets the spec with a feeler gauge. In a good quality piston like the Mahle if the gap is too big, likelyhood is the bore is too big. It is two in the morning here and I can't remember the spec, it will be with the piston bumff, and in the workshop manual.

When fitting the rings be careful if you haven't done it before, they are very easy to break. Remember stagger the ring gaps round the piston, and keep the gaps away from the thrust side of the bore.

Regards,





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