Hello all,
I have a A5 B8 with the 2.0 TFSI engine.
A couple of weeks ago while on a road trip to Chicago, I noticed the engine was running rough and a slight burning oil smell after we got off the highway. This was a 280 mile trip. Prior to this the car was running great. No check engine light until the day we left. We didn't drive the car while in the city. I decided to drive it home as it ran fine under load and the oil level was fine.

When I got home I checked the codes. P2279 P0300 P0301 P0302 etc.

I went for a PCV Valve replacement. The one on the car was an AE unit with a white cap, so I replaced it with the revised AK unit. No change in the conditions. And I have seen drips coming from the engine. Also if I open the oil cap when the car is running there is basically no vacuum present.

I have a feeling I may have to do a RMS replacement or perhaps the Front Valve cover gasket or both?

Today I took off the skid plate and had a look. Seems like the front AND back of the engine are wet
The skid plate looks like most of the drips are coming from the back of the engine.

I'm pretty handy fixing cars, but this is my first Audi. I have worked on BMW's and Mercedes which I have owned as well. And I saw an excellent write up in this forum about replacing the rear main seal. If this is indeed the problem, this is something I will do while upgrading to a billet seal carrier.

here are some pictures of the wetness:
engine front.jpgpassenger side of engine.jpgrear of engine01.jpgrear of engine02.jpgtransmission01.jpgtransmission02.jpgSkidplate01.jpgSkidplate02.jpg

And a couple questions:
1. What do you think? The RMS job looks pretty big, so I want to be sure this is it before tackling it.

2. If I restrict the flow from the PCV to the manifold the engine runs much better. Will this cause any problems? Like increasing the oil leak rate of anything else?



Thanks,
Dave