severe oil leak inside the timing belt cover
 

my 1999 s-80 t6 all of a sudden developed a severe oil leak and its behind the timing cover. from what i see it looks like its above the crankshaft . i left it at a garage and the owner wont work on vovlo. any suggestions as to what it is and how hard it is to fix it? i know it will need a new timing belt with all that oil leaked out on it