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Old 06-19-2001, 08:12 AM
stevebfl stevebfl is offline
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
For years all that was necessary was a pair of new o-rings. In the last five or so years the replacement R4 has used a seal with a steel washer and rubber bonded to it. Since this washer arangement came out I have seen 2-3 manifolds that have been overtightened to the point where they are no longer staight across.

There are now at least three different seals for R4 compressors: o-ring, thin metal washer/rubber, and thick metal washer/rubber.

I have not decided when the two different washer seals are used, but the compressor seal area is different for the o-rings.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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