We completed a top over haul of out 912 ULS with new pistons, cleaned and lapped valves, engine runs great but we are leaking oil between the head and cylinder barrel at the through bolts. We found a service bulletin for gadgets/o-rings on the through bolt between the cylinder barrel and block. We install the o-rings but we still have the leak.
We are stumped. :huh:
We are stumped. :huh:
