523xi Dm850 oil leak behind front flywheel.

[Fordiesel69 272]

So the forum has a limit of 0.97mb on the photo size so I can't get my phone to take a photo that low resolution.  Anyways the leak is between the engine block and the aluminum housing that is located behind the flywheel on the front of the engine (pto) side.  

 What does this involve.  I'm not super interested in pulling the engine out of the tractor.