A good sealer is Loctite 515 or 518

"Richard Lamb" wrote in message
ink.net...
jls wrote:

"Orval Fairbairn" wrote in message
news

Volkswagen engine builders use Gascacinch, Yamabond, and some german
goo who's name escapes me at the moment to seal similar faying surfaces.


Do nor use RTV to seal crankcase halves! It allows minute movement and
will cause the mating surfaces to fret.


According to the FAA an A&P in NC put a 6-cylinder Continental back
together
with RTV silicone on the studs and under the cylinder flange nuts. The
engine later failed catastrophically in flight killing two in a Bonanza.
One of the cylinders had departed the crankcase, apparently because the
nuts
backed off.



You know, this might address some of the VW problems as well.