So I have a new-to-me '99 s-10 2.2L 4-cyl. I thought that it may have a rear main seal leak, but I recently replaced the clutch and the seal looked fine. The oil pan gasket on the other hand looks to be leaking . . . the book makes it look like a bear . . . removing the engine and everything. Is it possible to replace the seal without taking the engine out? Dealer wants $870 for it . . . not going to happen. Anyone have suggestions?