My 1990 FXRP recently broke 100,000 miles. The right-side engine case has also broken. There's a crack running from the right rear engine mounting bolt downward to wherever. Leaks like the Exxon Valdez once the engine warms up.
I recall this being a pretty common problem in the 90's with engines that had performance work in them. The guys I work with say they've never heard of it. Anybody out there had a similar problem, or know somebody who did?

 

The early cases can do that at extreme mileages.....get some later cases (1998) and build from there.

 

There's a thread or two here in the Evo forum with pics of that happening. Do a google site: search on this forum. I think your year was cast with an area that was a little thinner than the previous and later years, but I don't recall exactly which years were more susceptible to the problem. Still, a hundred thousand miles is pretty good. You could send the case to HD and get a new one with the same numbers, or do the HD engine rebuild thing or get what you have TIG'ed up.

 

Wow it won't let me link to another page...maybe you can guess what is "stared" out.

http://www.****************/forums/e...what-look.html