I've been a licensed aircraft mechanic since '81, and was taught to use
this method on aircraft cases.
  I've rebuilt many engines, and never once tried this trick.
  The only time the case-split leaks is when some PO used a screwdriver to
pry the case-halves apart.
  I've never had one leak at this split.
  I agree with idea of "not fixing a problem that never existed in the first
place".

Mike B.

--------------------------------------------------
From: "Mark Dearing" <VWBrain@AOL.COM>
Sent: Sunday, August 29, 2010 12:06 PM
To: <vanagon@GERRY.VANAGON.COM>
Subject:      Re: Engine Assembly Wizzdom

> yes it has been done but it really isn't necessary . I haven't seen very
> many engines leak between the case halfs .  later  mark  d