Worn Cylinder Head Vanos Seals

N

NickDE

Senior member
 Newcastle upon Tyne
My Z4C has been giving inlet Vanos error codes for the last few months. With it the orange emissions light would come on. If I didn't use the car for a few days the light would go away, and only come back after about 100 miles.
Measures my workshop tried - clean the Vanos solenoids, swap the solenoids over, replace the solenoids. His options to repair:
Try a thicker oil and hope (I already run Mobil 1 0W40). I guess I could try Motul 300V 15W/50.
 
Surely used cylinder heads would have to be less than than half the cost of the repair that may not work, and you get a chance to inspect it for the oil ring/seal groove damage mentioned in the video (another great advert for regular oil changes with good oil!)
 
Is this a common occurrence on the N52? I have to say I've never heard of this fault before.
 
The cost for bmw to replace the head on my old N52 was only £3.5k including labour so if that £4K is just the head I’d be surprised.
 
srhutch said:
The cost for bmw to replace the head on my old N52 was only £3.5k including labour so if that £4K is just the head I’d be surprised.
Click to expand...
Why was it replaced ?
 
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