How to deal when there's no gasket?

 

I am currently restoring a Yamaha XT550.
    The first thing needed was the shift shaft. Broke the engine down to
find there is no gasket for the 2 crankcase halves. It looks like it was
sealed with something liquid that later hardened. I have scoured the manual
and parts diagrams and I can find no gasket for this application. I have
what is supposed to be a complete gasket set as well and there is no gasket
for this.
    My question is this, what do I use to seal the 2 half's? I was planning
on using Permatex Black as it gets semi-hard.
Any other ideas???

MD

 



thumperstuff.com
should have your gasket.

 

Probably some form of liquid gasket in a tube see example link below
http://www.hylomar.co.uk/siliconesealants.htm
There are quite a few on the market, I only used this example as the hylomar
blue has always been good for me to get a stubborn gasket leak to seal.

Bob



planning

 

yamaha never put a gasket there. Use a good quality gasket sealant for
motors. One that states it can handle high temps and oil. Y
our local auto parts store will have it.
Dennis

wrote:

 



Would the thickness of this material not affect the preload on the bearings
in each case half? Too thin and there will be compression, to thick and
there could be lateral movement?