Rear main seal issues

I am trying to replace the rear main seal on my 92 3.0 V6. The housing seams to be stuck to the oil pan. The two studs at the oil pan appear to be stopping the housing from coming out but I cannot figure out why.

any help would be appreciated.

 

Double nut the studs and remove them from the seal carrier. Take a utility knife and cut the seal between the oil pan and the seal carrier. The the seal carrier can then be removed from the block with some tenacity as it has bushings that position it onto the block which is whey you can't get it off with the studs in the carrier. Get new seal and a Harbor Freight Press or equivalent and install the new seal with an even draw into the carrier otherwise it will not stay round and the rear main seal will leak around the crank. This has been the only way I have had any success in getting these seals to be leak free after install. Clean the block and oil pan surfaces and fix the seal carrier back onto the block and pan with RightStuff Gasket Maker. Be sure to put grease inside the seal were it contacts the crankshaft prior to installing on the engine. Torque the M6's at 8 to 10 Nm evenly to assure the carrier is flat on the block and square with the crankshaft. Replace studs and nuts and draw up the pan to squish the gasket maker being sure there is plenty at the junction of the block and the pan were the carrier has its edge and corners.