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Old 12-11-2007, 09:37 PM   #50
Rajaie
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Join Date: Nov 2007
Location: Raleigh, NC
Posts: 1,275
My Ride: 528i 06/00
Quote:
Originally Posted by 951Tom View Post
I noticed looking in the ETK parts diagram that the vanos electrical solenoids have pistons with o-rings also. Can these o-rings be replaced?
You're correct; the vanos solenoids do have an O-ring at the base. This O-ring seals the oil at the solenoid / vanos body junction.
This O-ring is fairing well. Also I have not heard of any case of this O-ring leaking (external leak at junction). The O-ring replacement cost would be insignificant. I'm not sure why BMW lists it at such a high price. But the reason I don't include it in the seals kit is simply because it is not failing. IMHO there is no need to have everyone remove and remount their solenoids for no real reason.
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