View single post by James Wilson
 Posted: 12-15-2006 11:57 am
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James Wilson



Joined: 11-01-2006
Location: Glasgow, Scotland, United Kingdom
Posts: 34
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 I've a copy of the Workshop Manual and page 4 Has piston diameters- Grade "A" as 3.7467-3.7472 and Grade "B" as 3.7472-3.7477 and I believe that they were originally installed all from the same grade.

The differences could be as much as .001 between the "A" minimum and the "B" maximum, though the mid-points of the ranges would be 1/2 that. I suspect that it might matter, but I've never run across this before and do not know. I may have to phone a local machine shop and ask them. I intend to have the pistons thoroughly checked and balanced in any case so the weights should be virtually identical- but what about the fit to the bores....