Hi there S54'ers,
About to do a valve cover gasket replacement on my S54, but would certainly appreciate any insights on where else the oil leak may be coming from before I do. Short video here:
Details:
A small amount of oil is leaking from somewhere along the valve cover or back of the engine, burning on the hot cats, and driving me crazy every time I put on the AC. Before I do a valve cover gasket replacement, I wanted to see if anyone else had any ideas.
The Problem:
* Engine has a small oil leak that causes burnt oil smell to travel into cabin (and, it's an oil leak).
The Situation:
* Engine (BMW S54) has 100k miles on it (chassis has 150k).
* All consumables outside of cracking the block (VANOS, valve cover gasket, rod bearings, etc, etc) were serviced/upgraded to OEM/OEM+ 15k miles ago.
* New CPV O-ring was installed 10k miles ago, along with new cat, just to be proactive.
* I just installed a brand new exhaust cam position sensor to rule that out as a source (was source of leak in the past).
The Questions:
* Might it be something other than the valve cover gasket? If so, what?