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Discussion Starter · #1 ·
Noticed my engine smoking before Christmas (2013 520D). Took it to my local BMW specialist who said it was most probably the rocker gasket leaking and burning on the exhaust. Made sense based on what I could see and the posts on here. He replaced it and it did it again so just had the rocker cover done thinking it must have a crack. Still smoking. It’s coming from the back of the engine. Any help very much appreciated.
 

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Can they actually see there’s oil on top part of engine? Not really a lot up there at back off it is. Rocker cover which you have done,upper timing chain tensioner,timing case, cylinder head gasket? Has it had any recent work like timing chain replaced?
 

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Discussion Starter · #3 ·
Nope, no recent work Jonny! This is a pic I managed to get before they did cover of where I thought the leak was from. (drivers side corner of the rear of the engine) I’m going to wipe it clean at the weekend and see if it comes back. Weird thing is it can be fine for a few journeys. I drove back from the garage tonight 12 miles with no issue. Just nipped the Mrs 4 miles down the road and it was smoking.
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So it’s had a gasket and then a new cover fitted already,did they give it a good clean off after?
My n57 was still smoking after I did rocker cover because there was a build up of oil on the head in area of exhaust manifold.
I would try and give the area a real good clean and see if anything appears again.
Only other thing I would say is the covers have a specific tightening sequence to pull it down evenly,whether it’s critical or not I don’t know but I follow it just in case.
 
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