Wombat left main crank seal

[hodakaguy]

I have a question. I installed the left crank seal flush with the case. Is this a bad thing? I read a service bulletin about this but don't know if this impacts a wombat 94. Has anyone had lubrication problems from this?

Thanks for any information in advance.

[Pep]

This is off the top of my head - seems like they were originally a 5mm depth but now a 7mm? So leaving it out just a bit is the way to go with a 7?
On the old forum, I remember someone addressing this - maybe someone remembers the details better.
I've put a very thin coat of gasket sealant on the outside to help it seat well and keep it from slipping out - not sure how necessary that is, but...
-Laurie

[tvrc18]

I know the Ace 100 and 90's you needed to leave a little bit of the seal sticking out so you do not block the oil hole to the left crank bearing. I just rebuilt an Ace 100 and the seal was pushed flush to the case, that bearing had seemed to suffer some compared to the other side.
Terry

[Bullfrog]

Yup, pressing the seal in flush is not a good thing. As mentioned, it will block off the oil "dribble" from the lubrication tunnel/hole which supplies oil to the "outside" of the crank bearing . . . but far more importantly that oil supply is critical for the health of the seal itself.

While it isn't any fun, at least that seal can removed/replaced with engine in the frame . . . and that is what I'd recommend. Be sure to NOT press the replacement seal in flush.

Ed

[hodakaguy]

Thanks everyone. I pulled the seal and replaced it with a new one. I guess it is an experience at best. I have 4 others to build and will not make that mistake again.