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I have (conceivably) a tip for guys that don't want their engine to leak oil. I bought a 12x14" granite surface plate and the Snap-On stud puller kit (great purchase!).
These are my "favorite" places for 911 engines to leak: chain case/case, chain case/cover, chain case cover, cam housings, valve covers, valve cover mating surface on heads, timing shaft cover plate, thermostat housing, mating surface for the t'stat housing, in other words, everywhere.
I spray glued (minimally) some 120 grit to the surface plate and had at it with all these surfaces (minus studs, of course). I left the case on the bench and held the surface plate in my hands and ground away, using circular motions. You would be amazed it what it took to take these down to flat. No wonder 911 engines are prone to leaking oil! All this was before I sent out me case for a good cleaning and lots of other work.
The sump area was too small for my surface plate. The machine shop will be flycutting that area. No grinding on the case halves. Now, if I use all the sealants described in this wonderful thread . . .
Hope this is useful!
- Rob
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