oil leaking off oil pan, and on cat. 940 turbo

[DaBossk]

Originally Posted by professor245

Sure that looks like rear main seal
Also have you checked the back of the engine under the dizzy, it could be leaking from dizzy seal and pour down in that location...

okay cool. is there any quick way to confirm that the rms is leaking bad? also by dizzy do you mean distributor cap? if so just get a new distributor gasket/seal?

[2manyturbos]

It could also easily be the oil cooler to block seal. Those are notorious for leaking. It is an o-ring as well. If you want to know whether your rear main seal is leaking, pull the transmission/block support bracket. That large aluminum casting that bolts to the bottom of the engine block and the bell housing of the transmission. If the rear main seal is leaking, you will see oil all over the flex plate/flywheel and on the back of the block. If you don't see signs of leakage there, it is probably the oil cooler that is leaking. When those leak, the oil runs down the side of the block, then, along the pan to block intersection until it drops off at the back of the block on to the trans support bracket and onto the transmission pan etc. Also, the distributor seals are known for leaking as stated above.

[DaBossk]

Originally Posted by 2manyturbos

It could also easily be the oil cooler to block seal. Those are notorious for leaking. It is an o-ring as well. If you want to know whether your rear main seal is leaking, pull the transmission/block support bracket. That large aluminum casting that bolts to the bottom of the engine block and the bell housing of the transmission. If the rear main seal is leaking, you will see oil all over the flex plate/flywheel and on the back of the block. If you don't see signs of leakage there, it is probably the oil cooler that is leaking. When those leak, the oil runs down the side of the block, then, along the pan to block intersection until it drops off at the back of the block on to the trans support bracket and onto the transmission pan etc. Also, the distributor seals are known for leaking as stated above.

is this the support bracket you're talking about?
http://imageshack.us/photo/my-images/844/post5h.jpg/

do you happen to have any pictures of where the oil cooler leaks at?

[2manyturbos]

Originally Posted by DaBossk

is this the support bracket you're talking about?
http://imageshack.us/photo/my-images/844/post5h.jpg/

do you happen to have any pictures of where the oil cooler leaks at?

No, the support bracket I'm referring to bolts to the bottom of the engine block. It surrounds the back of the oil pan. Take that off and look up into the flywheel area for any signs of an oil leak. The oil cooler is the oil filter housing. You are looking for a leak right where the aluminum oil filter adapter housing meets the engine block. That is a really common spot for the engine to leak. The o-ring shrinks over time and starts to leak quite a bit because it is under 30-65 pounds of oil pressure the entire time the engine is running.