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Old 05-18-2010, 12:39 PM   #10
Bullet Ride
Cars in Perpetual Repair
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Join Date: Nov 2007
Location: Guelph
Posts: 6,000
The site that you got that picture from says right at the beginning
The valve used a faulty O-ring material and was later replaced in 11/90 with a better quality material called Viton, outlined in BMW Service Information bulletin 11 09 90 (3137).
You can try replacing the o-ring or buy an oil relief valve kit off from for like $12.
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