[T3] Mahle Cylinder kits
Jim Adney
jadney at vwtype3.org
Mon Apr 1 21:58:20 PDT 2013
On 1 Apr 2013 at 20:32, Keith Park wrote:
> I just bought an old stock Mahle cylinder kit, 1600, while I could still get
> it without the Chinese liners.
> However, they are .05mm UNDERSIZE. That's right, 85.45mm, now that's not a
> problem but WHY would Mahle make undersized
> Cylinders and pistons? Ive never heard of this before, has anyone else??
This is probably a non-issue. The P/C sets came in 2 size groups:
Pink & Blue. Yes, really. ;-) There should be a color paint dot on
the face of each piston, and I think there would have been a matching
color dot somewhere on each cylinder.
Somewhere I've seen what the colors meant, but only the colors show
up on the parts list. Keep in mind also, that the pistons have to be
smaller than the cylinders, so my guess is that 85.45 mm was one of
the actual stock sizes.
I'm sure this was done at the factory to lower their scrap rate. This
way they could maintain their P to C tolerances without throwing
parts away. They would just match up Ps & Cs, weigh them, and sort
them into matched sets to be assembled into engines or sold in sets
of 4.
Keep in mind that, like connecting rods, there were also different
weight groups. They didn't all automatically come out the same.
--
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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