The oil pan gasket has a unique front seal, It connects to the timing chain cover with little teets. You install the cover to the block, then the pan to the block in that order. The front pan gasket cant be R/R without at least loosening the pan enough to drop the front 1/2". Torque down in as much as a criss cross pattern as possible starting from the middle with all bolts hand tight first. tranny pan is way easier.