Originally Posted by flying_bosun View Post
No oil from his mod to directed under the seal.
You can see from how his unit is turned that he drilled the upper bushing through the fill hole in the reservoir then attached the oil line there. Just as with my oil cup mod, the oil enters the bushing through the drilled hole & finds its way over the top of the upper bushing. Since his oil level is above the bushing oil is pushed (pressurized) by gravity. The OPDA seal needs to keep most, if not all, of the oil from going into the crankcase otherwise you would constantly be removing excess oil from the oil pan & adding to the OPDA “tank”.
I purposely used an oil cup to keep the oil level below the top of the upper bushing to avoid flooding the upper housing area. Even with oil well below that level, a small amount of oil gets over the top. My original write up is post #1050 Photos of the accumulated oil is in post #1867. It is not only pressure that causes the oil to rise.