Hmm, that would seem to be based on a misapprehension. I can see how you
might want a polished surface if the pistons were a sliding fit to the
seals, but in fact there should be no relative movement between the seals
and the piston. The seal itself flexes to accommodate the very tiny range of
motion required for braking, and the rebounding of the seal retracts the
piston when the brake is released. So I don't see how the finish is
relevant. But maybe I'm missing something.
on 1/31/05 3:44 PM, Maynard Hirsch at mghirsch@netzero.net wrote:
> There was a discussion of this on the Jag Lovers Web Site. It seems that
> stainless steel pistons have the matt finish as opposed to chrome plating.
> The consensus was that the rougher matt surface contributed toward leaking
> calipers. They recommended polishing the pistons before rebuilding.
>
> Maynard
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
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