leaking engine

[Bill UK]

There is an oil seal and gasket at the rear of the engine (see pic below) this is where the crankshaft end connects to the flywheel or torque converter, depending on whether you have a manual or an auto box. I would definitely check the cam cover seals and possible the sump seal for any oil leaks before assuming it’s the rear crankshaft oil seal. Also the 7M engine does slope back at an angle (probably about 5 degrees at a guess) any oil leaks will eventually find there way to the back of the engine.