Crank Seal Problems !!!

[JoshT]

Ok im looking for help here !!! I had installed a open primary last year and had the leftover oil from the wet primary and ended up having to change out the seal anyways because it was leaking after all. Road pretty much all year and then towards the end it started to leak again. Now over the winter I have put in a new seal and well low and behold it is leaking again. I cannot figure this out.. I am installing it backwards as recommended and also using a seal tool. The leak is coming from the center around the shaft. The outter area of the seal is perfect and no leaks are found. I have inspected the crankshaft and there does not appear to have any scaring or anything at all the would ruin the seal. I am at wits ends here trying to figure this thing out.

Could it be possible that I have bad rings that are causing pressure to rise in the crankcase causing the oil to push through the seal ? This is the only thing that I can come up with in my little brain !! Please help me out here :bang:

 

[f-okie]

I got mine to stop after the first change-don't know what to tell you...

 

[Little-Boo]

Ok im looking for help here !!! I had installed a open primary last year and had the leftover oil from the wet primary and ended up having to change out the seal anyways because it was leaking after all. Road pretty much all year and then towards the end it started to leak again. Now over the winter I have put in a new seal and well low and behold it is leaking again. I cannot figure this out.. I am installing it backwards as recommended and also using a seal tool. The leak is coming from the center around the shaft. The outter area of the seal is perfect and no leaks are found. I have inspected the crankshaft and there does not appear to have any scaring or anything at all the would ruin the seal. I am at wits ends here trying to figure this thing out.

Could it be possible that I have bad rings that are causing pressure to rise in the crankcase causing the oil to push through the seal ? This is the only thing that I can come up with in my little brain !! Please help me out here :bang:

Did you add a little assembly lub on the inner lip so that when you first start the bike it won't turn on dry surface and heat up which will cause it to harden and fail shortly thereafter. That has happen to me before changing a rear main seal on a car. I was told to apply a little assembly lube so it won't be dry on the initial start up. Things were good after that. Hope that helps

Carlos

 

[RubWhore]

The big Question is did you turn the seal around as when you go to an open primary you are supposed to???

 

[JoshT]

Yes a little lube was applied and yes both of the seals were installed reversed. That is why I am scratching my head here !!

 

[sh8kr]

Do you have the bottom of the crankcase vented? If not try that, it is a 1/4" allen plug next to the oil pump. when you have the closed primary the leak will not be as obvious unless you measure the level in the Primary each week. If you do the crankvent be sure to run the hose at least 12" and AWAY from the rear tire, best to put a small filter or catch can on the end of the hose. A leson I learned from John Sachs about these big Bore motors.
Steve C

 

[john sachs]

Do you have the bottom of the crankcase vented? If not try that, it is a 1/4" allen plug next to the oil pump. when you have the closed primary the leak will not be as obvious unless you measure the level in the Primary each week. If you do the crankvent be sure to run the hose at least 12" and AWAY from the rear tire, best to put a small filter or catch can on the end of the hose. A leson I learned from John Sachs about these big Bore motors.
Steve C

You can also put some silicone sealer on the spline where the sprocket carrier rides.Let it set up and dry.
John