I was wondering if anyone is familiar with the apparent problem of very dirty valves on direct injection engines. I was made aware of this by a friend who has one of the newer turbo BMW 335i's. The problem is supposed to be caused by oil getting blown into the intake from the PCV system, and since there is no fuel ever cleaning the valves; this build up seems inevitable. This seems like a problem they should have run into when testing the engine... anyone have the lowdown on this?
Apparently this problem is happening to other DI engines. But here are the first images I saw..
Post for Carboned Valve photos - BMW 3-Series (E90 E92) Forum - E90Post.com
Apparently this problem is happening to other DI engines. But here are the first images I saw..
Post for Carboned Valve photos - BMW 3-Series (E90 E92) Forum - E90Post.com
Last edited: