I am trying to track down an oil leak that only occurs when my newly rebuilt 455 is running.

Short test drives would result in about 1 teaspoon of oil in the bottom of the torque converter access cover. So I took it off.

Now short test drives result in oil dripping off the passenger side rear corner of the oil pan and some oil flung on the oil filter. I clean off everything after each trip and the areas that drip oil are consistant.

I have found that the oil filter is tight against the housing (no oil on top of the filter) and I just replaced the gasket between the oil filter housing and the block so no leaks there now. There are no drips or oil residue on the front face of the flywheel either.

Wouldn't a rear main leak cause drips straight down from the end of the crankshaft? Or is crankshaft rotation causing the leaking oil to fling to the right side (only)? That does not make sense to me. If the oil is being flung through rotation, I would think it would be everywhere.

I also have oil pressure from hell, so I am wondering if oil is just being pushed past my "supposed to be the cat's meow" BOP Viton seal and this will settle down one the motor is not so tight.