502 Front Crank Seal(s) keep leaking
 

Rebuilt the engine last year and keep getting a front seal leak.

During the rebuild, we replaced the original seal, cleaned the damper seal face. Installed the seal on the bench.

I've replaced the seal 3X, tried multiple mfg's (including the National seal). Every time I change the seal, I grease it before the damper is installed.

I've tried sleeving the damper 2x, once with the heat method - the other by press.

When I replace the seal in the boat, I made a tool that uses the damper bolt to push the seal on squarely.

The last seal lasted he season last year. After coming from winter storage the leak came back?

The other engine did the same thing after winter storage last year, it was rebuilt the year before. Sleeved it at the end of last season, it isn't currently leaking.

Anyone have this issue? These leaks are getting old!.

you sure its not coming from the bold and washer ? I always put a ring of rtv around the large washer holding the damper on,

I've chased my tail with issue before, finally fixed it by replacing the front and rear oil pan seal with form a gasket oil leak fixed!