you could try removing the collar and putting a light coat of yamabond on the inside to seal against the crank ?
gotta let it sit overnight to cure before trying to start or even rotate the crank
ok ill try that thank youSlide the collar off the shaft, completely clean all oil or other suff off.
Spread a little bonding agent on both the crankshaft and the inside of the collar.
Leave until the bond starts to get tacky and fit the collar, and button everything else up.
Leave overnight to cure, should stop the leak.