2004 BMW 745 COOLANT

What is it leaking? (oil, coolant, fluild..) Where is it leaking at? (under hood, exhaust etc..). When does it leak and how badly? (only while driving, when idling, etc..)

it looks like its leaking behind the water pump out of a small hole on the block {coolant}

Are you sure it isn't the waterpump itself leaking? It can leak causing it to appear to be leaking from the block..they will leak when they begin to fail

COULD BE! I JUST WANTA MAKE SURE I CAN SEE THE HOLE IN THE BLOCK I DONT KNOW IF ITS SPOSE TO BE PLUGGED OR NOT!

The work is extensive. It is an O-ring failure. 16 hours labor. Will you do it yourself?

THANK YOU WHERE IS THE O RING

It is behind the front timing case.