From digest.v6.n672 Mon May 19 08:57:46 1997
Date: Sat, 17 May 1997 18:11:28 -0500
Subject: Re: <all>Air Conditioning problems
I would like to elaborate on Brett's comments in Vol 6, No. 670 regarding
If the model year of your BMW is between 1980 and 1991 (it varies among the
chassis, as BMW changed to a Nippondenso compressor on certain chassis
during certain model years), you have a rotary vane compressor built for
Bosch and Behr. These compressors contain an elastomer called Viton.
Viton disintegrates when it comes in contact with HCF134a and
If you do a retrofit, you HAVE to change the compressor (and the reciever
dryer). The rotary vane unit WILL fail. Your options are a rotary vane
remanufactured with neoprene elstomers (these compressors are hard to
find), the BMW OEM replacement (this is a Seiko Seiki unit and it is
expensive) or a Sanden or Zexel (aka Diesel Kiki; use of either of these
last two requires a new mounting bracket, but these are easy to come by).
Hope this helps.
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