You have to remove the airbox, serpentine belt, alternator, plus the T/B and the T-plenum behind it. Then you will be able to access the TWO bolts that holds it down to the top of the block. One on the block and the other on the P/S pump/pulley cage. The image shows the orientation of the two blts that hold the oil filler tube in place. Info and pic where copied from a post on the Rennlist forum.

http://img37.imageshack.us/img37/226/wsm.png

Be carefull removing the T/B and T plenum. If you have never worked on a modern Porsche engine I would caution you to get expert help. Lots of ways to break more stuff in the process of fixing other stuff on a Porsche.

 

ouch!

good luck with the repairs sir!

 

Wow , it seems very hard job and am not an expert at all , my biggest DIY is the Cat & muffler , so I will take it to the shop also I have other things to be fix ,
I closed the opening with duct tape , and I will tow it to the shop...,

Thanks to everyone