Oil leak from bell housing drain saga.

[Stevex]

I would have added this to my previous post about a leak from the bell housing drain on my LM2 I've been chasing for a couple of years, but I just couldn't find it.
A few months ago I carried out my second 'crab' after my first one one was unsuccessful in finding a leak or a cure.
The last one I went to town on, pressurising the crankcases and removing the drain pipe to fully enclose the cam bung with JB Weld.
I was still unable to find a fault, pressurising the cases and using professional leak detector indicated no faults.
A couple of days ago the bike had it's first Spring outing and hurrah, leak is cured.
I can only think that the breather pipe from the breather box going down to rigid pipe in the bell housing was causing the leak as I did it up a lot tighter than it came apart.
So, 2 'crabs' for a 5 minute fix. Check your breather pipes, even it it looks ok, it might not be.

[n3303j]

On my V11EV I did all the leak preventative procedures. Found the one way PCV valve in the pipe coming throught the bell housing from the crankcase was sticking closed. Replaced the valve. I also removed the crankcsse vent tube and installed a replacement gasket. I looked closely at the replacement and noticed part of the contact margin was less than 1 mm wide in some places. Certainly not enough to make me feel secure. I remade the gasket to provide maximum margins, then reinstalled with Permatex and proper torque. No further leaks.

[guzzisteve]

Good catch, seen oil run down that pipe from loose clamp on hose too.