how do i remove this rr main seal? thinking of replacing this part too. oil is visible on the housing but i suspect oil is coming from rr part of the head where there are 4 bolts. 2 bolts hold the 2 brackets for the small exhaust pipe that goes by the water pump. 1 of the 2 bolts dropped while working and oil started leaking. if my guess is right, good. if not, it about time to replace after years of driving.