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Old 11-01-2018, 03:31 PM
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CleanIsFast CleanIsFast is offline
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Quote:
Originally Posted by jpcallan View Post
Dorman offers a vacuum pump repair kit, P/N 917-146, that services the engine drive coupling O-ring, the big pump case O-ring, and includes four replacement pump cover screws in case these get damaged taking it apart. The price for this kit is expensive for what you get, all over the map: $53 to as little as $25; plenty of people sell it on eBay.

The latest pump engine drive O-ring from BMW sells for about $10 MSRP, P/N 11667509080 (07119903506, 11660151057). The numbers in the parentheses are still valid, but superseded BMW P/Ns.

BMW doesn't service the case O-ring, instead selling a whole now pump. My friend Dave got clipped for $625 November, 2017, for a leaking case O-ring. A month or two ago, I found this table data describing the vacuum pump O-rings:

Case O-Ring
------------
Maximum Inside Diameter 93.66
Maximum Outside Diameter 96.76 mm
Maximum Thickness 3.10 mm
Minimum Inside Diameter 92.34 mm
Minimum Outside Diameter 95.24 mm
Minimum Thickness 2.90 mm
-
Engine Drive O-Ring
-------------------
Maximum Inside Diameter 53.45 mm
Maximum Outside Diameter 56.55 mm
Maximum Thickness 3.10 mm
Minimum Inside Diameter 52.55 mm
Minimum Outside Diameter 55.45 mm
Minimum Thickness 2.90 mm; 2.90 mm
Thanks for info!
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