Not sure yet there's so much oil and hard to track down exact source even after cleaning 3x. Im starting to lean to the the oil leak is comming out of one of the two rear breathers due to excessive crankpressure (higher HP truck with ppump) . However I'm not sure what to do about it. Already have the 2 breathers. http://blogs.dieselpowermag.com/6817455/whats-new/cummins-vs-crank-case-pressure/ I've heard that a vacuum leak or turbo seal leak can cause that. Doubt its turbo as its new ...... Any ideas of input into this one. How to test vacuum leak/drawdown ...... and what do do about reducing oil leak. There is 0 blowby from the front oil collector at front, 0 blowby from the oil fill cap and I cant see any blowby at the source of the leak (tappet cover vents) whilst idle. Dont know if thats a clue or not ...... but engine seems real strong and healthy.

Dunno - If you read the threads theres a number of people dealing with it. Some from higher HP, some from the billet tappet cover.

Right now I need to get the oil under control so will do some sort of catch can.

Funny thing is if I just route a hose down (no gravity to fight) the amount of oil is actually only a couple drops. Similar to my 01 that had your vented PVC mod over the negine. This 12v billet cover has no baffling and no gravity to fight - so Im starting to think poor design in the tappet cover more than anything else - but will see and keep you posted.

Edited December 20, 201311 yr by JOHNFAK