> >  Yama-seal and a generic version can be found at cycle shops, I

 > > believe this is a urethane based sealer.
 > >   I don't like the idea of the sandwich mount as I have fought

oil pan

 > > leaks and the thought of mount sandwiched between it
 > sounds like more
 > > leaks.
 > >   Also I have found it best to run without a gasket.
 > >
 > >   Ken Welter

 Ken, The product you are referring to is called YamaBond. Kawasaki
 and Honda also have a similar product. The item is CASE sealer. The
 motorcycle engine/transmission cases are split on centers. The case
 seal is an excellent product for good FLAT (read machined or lapped)
 surfaces. The only problem is that this stuff sets up. Unlike

silicone

 sealers the case bond needs the items to be put together within

about

 1 minute. This isn't a real problem but the parts need to be ready
 to go. This stuff lasts a long time too. I have used tons of this

stuff.

 It is hard to get off, (clean) and the parts are often nearly glued
 together. The motorcycle engines often have jacking bolts to pull
 the case apart again. Good for the upper pan/mount. Bill Jepson

  Yes I think you are right, put YamaBond on the upper half and use
Ultra blue on the lower half.
  All I have been using is the Ultra blue and I goop it on heavy
without any worry as the excess that goes inside sets up and will not
flake off and I have never found any in the oil screen.

  Ken

"Brian D. Cain" wrote:

One more thing I wanted to add on this subject:

When doing both the front cover and oil pan/baffle plate installation during
an engine rebuild, alot of what I've personally discovered in helping
prevent
oil leaks from ever starting, besides the scotchbrite/brake cleaner trick,
is to
use a good, thick, and sticky assembly lube.  I brought the subject up once
several months ago in a thread as it was related directly to this subject.
One
thing I found during older assembly jobs is that when I used a thinner,
drippy
assembly lube (or straight 30 weight engine oil) for the crank bearings and
bearing journals, I had problems preventing pan and front cover leaks.  The
problem was when I was assembling the front cover and then the oil pan, I
would
have the engine tilted upside down.  The oil/lube would we gravity-fed and
drip
out of the back of the rear main seal onto the gasketting surface of the
front cover
and/or the oil pan (when the engine was immediately flipped right-side up or
if
the oil pan was assembled w/ the engine right-side up).

My current procedure is:

- Use of high quality, tacky assembly lube (or baby-fresh scented
Vaseline/petroleum
jelly)
- Assemble front cover w/o paper gasket, using Permatex Ultra Black, with
engine
right-side up -> let stand for atleast 30 minutes (use this time to get a
snack)
- Assemble baffle plate/pickup tube/oil pan, using Permatex Ultra Black,
with engine
upside down -> let stand overnight

Just an FYI for you guys and another 2 cents of mine.  Hope this helps.

B

Brian D. Cain -/- Grand Prairie, TX -/- bdc196@comcast.com
MSN bdc196@hotmail.com, Yahoo! bdc196, AOL Symajhi, ICQ# 1733105
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