For me it's the measured clearance between piston and cylinder.
Within wear limits (and hopefully nearer to factory limits) I
suppose you could keep the old pistons. This should be weighed
against the level of perfection you are looking for - for example
at the high end I usually replace oil pump, chains/sprockets and
valves/valve guides as a matter of course and would never go
without new pistons and a rebore. New pistons in an old bore is
false economy since the boring/honing is relatively cheap. (In
the ole days they used to juice up a used car for sale with a
quick piston rings job).
If the clearance is at or beyond the wear limits, you rebore to
the next oversize. If there is no next oversize available, go to
resleeving. By then, might it not be cheaper to find another block
to avoid resleeving?
Mike L (have knurled old pistons back to diameter spec)
60A,67E,59Bug
----- Original Message -----
From: Den's E-mail <dbuster@integraonline.com>
To: <mgs@autox.team.net>
Sent: August 24, 2001 11:45 AM
Subject: engine rebuild
Should I automatically assume that I'll need to have
> the block rebored or do I assume that I can just buy a new set
of pistons
> and will need to do nothing to the cylinder walls? How do I tell
which
> course to pursue?
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