Hi guys I'm new to owning diesels and just got a 94 idi turbo. I seem to have a oil leak. Ive alredy changed the crankcase seal. Mines coming from the rear of the engine, down to the exhaust / oil pan. I've read about checking the cdr and valley also the turbo drain lines. I figured I'd check these first before I pay a shop to change out the rear main. As im a newbie. What the heck is a cdr and whats it look like lol! I've also read about punching out the baffle to the drain line or something. Can someone please explain. Any ideas would be great. I'd hate to replace the rear main, when I could have fixed it myself.
Thanks for your time guys
What do you mean by the "crankcase seal" ?
With the "oil" running down the back of the engine, are you positive it's motor oil or could it be diesel fuel. There is a drain from the valley pan to the rear of the engine, any fluid leaking into/on the valley pan will drain there.
The return oil from the turbo, usually drains back to the oil pan thru the valley pan where the CDR hole is. The factory turboed engines valley pan is made to drain the return oil, no need to punch any more holes in the baffle on the bottom side of the VP. Check the turbo oil return line so it's tight in the grommet in the VP.
I highly doubt the rear main seal is leaking, but it's possible. you would only see oil from rear main by removing the flywheel dust cover which would be covered with oil.
Here is pic of the CDR.
Edit: Re-reading the post, it could be the rocker cover leaking oil at the rear.
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