Tappet Guide block Oil leak
Hello, 1987 sporty 883. Has always leaked a small amount of oil at the tappet block. There is a small o-ring that acts as a seal between the engine case and the tappet block mating surface. The oil only leaks on the two blocks that feed oil up to the rockers. No leaks from the other two blocks.
Have replaced the o-rings twice now, still leaks a little. Like I said, it has always leaked (I call it sweating oil) since new, and it's getting expensive and time consuming trying to fix. Gasket set is 40.00 every time I tear it apart.
I thought about two different solutions and wanted to run it by someone with wrenching experience.
#1) I measured the O-rings and have come up with 1/2" od, 3/8" id, and 1/16" thick. Please correct me if someone knows if I am wrong in my measurements. I was wondering if a thicker O-ring like 5/64" thick would be a solution.
#2) Using some type of sealant on the mating surfaces like silicone (might be a mother to remove later) or coating the O-rings/mating surfaces with hylomar. At least if I used the hylomar, I would not be so concerned about blocking the oil journal like silicone can.
Just tired of this. It's the only leak on the bike, and if I can get my 1971 triumph to be leak free, I should be able to get this thing leak free!
Thanks for your time, Kevin