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jkh2cpu jkh2cpu is offline
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Join Date: Sep 2006
Location: Central Michigan
Posts: 211
Garage
Line Boring Side Effects (Chain Housing)

A day or two ago I reported that I checked the deck
height, and it was about 1 or 1.25 mm less than it
should have been. The other night a lightning bolt
passed through my brain on the way to sleep, and
I began to wonder about how far off are the chain
housings. Well, when the chain housing is mated to
the case, I can just bolt up the aluminum camshaft
flange cover, but I'm not in love with the fit: it's
close, but not touching.

Two solutions come to mind:

1. Go for the gold standard and have the chain housings
milled by maybe 1.25 mm.

2. Add two extra gaskets per side to make up the
difference... two together measure out at a little over
1.00 mm... This might be the eventual leaky standard

I have to add that when the case was being machined,
the machinist (Competition Engineering) thought that I
would be OK. I guess I am when the engine is cold, but
when it warms up, and things move around, I'd hate to
develop an oil leak.
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John
Original Owner 1973 911T. Webers, SSI, SAW & Polybronze, Carrera chain tensioners, 'A' calipers
Old 07-13-2015, 11:38 AM
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