You do not have to pull the motor to replace that pan gasket-But many find it easier. If you do it in car, get a one-piece pan gasket from fel-pro and it will include these blue "pins" that hold the pan in place while installing a new gasket. This is not an easier procedure. It requires patience and dexterity. You will have to remove the engine mounts, starter, trans cooling lines, and sometimes a radiator hose and cooling fan. Once you have done this it is only a few more steps, though, to take the engine out. Then you can ensure that the block, pan, and oil pickup are clean. This is also a good time to replace the oil pump if you have any doubts about it.