BMW E90 M3 S65 Vanos
Hey everyone,
I recently bought an 08 e90 m3 and have been experiencing some issues. its got 123,000km, no notable service history. I recently did some work which included replacing the valve covers, spark plugs, and vanos covers. I used Bavarian Autosport for the valve covers, new gaskets and tube seals, also changed the spark plugs, fuel breather valve, and new vanos snap on covers. After doing the job I noticed a noise on startup for a couple of seconds, its also misfiring decently bad and in limp mode. All of the misfires are on only bank 1, its throwing codes 271B vanos control exhaust bank 1, 2B35, 2B36, 2B37, 2B38, 2B41, 2B42, 2B43, 2B44. Also rattles for few seconds on start up. I took off the plenum and made sure no wires were pitched, everything is connected properly. I swapped the intake and exhaust position sensors and it made no difference, cant seem to diagnose the issue. Car ran perfectly before doing the valve cover work.
Dont know if it makes any difference for my current issues but when I drained the oil it seemed to be the wrong weight, maybe a 5w40 or something similar but not anywhere near thick enough to be the correct 10w60. Refilled with liqui moly racetech 10w60 and mann filter. No metal shavings or debris in the old oil though. I have yet to mess with the vanos solenoids but that seems to be the last and only other thing I can think of.
Any help / guide in the right direction to diagnosing my issues would be greatly appreciated. Just dont know what else to do before getting it towed to a specialist, cheers.