I managed to replace the oil pan gasket without removing the engine. But it was a real PIA. Steps: Drain Oil and remove oil filter, Jacked up vehicle for clearance to work under the car, Removed Y- Pipe from exhaust manifolds, Removed flywheel cover. Removed engine mount bolts, Removed Transmission Mount Bolts, Raised engine with engine hoist, Removed Oil Pan Bolts, Dropped Oil Pan, Spent about an 1 to 2 hours on my back trying to fish the oil pan gasket under the pick up tube and to the other side, I than spent about 3 hours getting all of the oil pan bolts in and the new gasket to properly line up to the oil pan.