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BMW 3-Series (E90 E92) Forum
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N52 Valve Cover replacement issues
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02-11-2020, 07:35 PM | #1 |
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N52 Valve Cover replacement issues
Purchased and installed the Beck/Arnley Valve cover kit (gaskets and the VC itself).
Issues I'm having are: 1) When removing the oil filler cap, the valve cover sucks in air. I thought the N52 shouldn't suck in vacuum 2) Have a P0174 Code and P0171 code, lean bank 1 & 2. 3) RPMS were going up and dipping down, but once the car warmed up it didn't do that anymore. |
02-13-2020, 01:16 PM | #2 | |
Robot
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Quote:
[QUOTE=Kooner23;25797314 2) Have a P0174 Code and P0171 code, lean bank 1 & 2. 3) RPMS were going up and dipping down, but once the car warmed up it didn't do that anymore.[/QUOTE] This sounds like a leak in the intake or PCV system somewhere. Can you get a smoke test done? |
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02-25-2020, 05:37 PM | #3 |
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I recently went through something similar with mine after getting a new valve cover installed at an indy shop. I was experiencing a rough idle with rpm's bouncing around 400-800 with occasional stalling and the lovely smell of burning oil and "random" misfires at cylinders 3 and 4. Turned out to be a cracked crankcase breather hose and a leaking valvetronic motor gasket. Replaced both and the car is running like new again. Get a smoke test done, it will be the easiest way to find your problem.
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n52, valve cover, vcg |
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