I recently replaced my R4 compressor in the benzo with a new compressor from compressor works. Went by the facilities since i work right around the corner. Talked to one of the reps, and all of the manufacturing is done on premise. They are also a direct supplier for delphi compressors and gm. Talked to the rep about x mark and bearing oil supply.

My compressor came with no x mark, but did instead have a flat spot where the x would have been placed in the appropriate position.

Very quiet operation, i cannot hear it run when on. Very solid component.

I thought about dis-assembly before throwing it in the trash. But it was enough with replacement. Glad some one else did it.

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airedale2 Welcome to Texas
1984 MB 300D 266,000
1993 Nissan PU 271,000
2002 Tahoe 122,000
2004 VW TDI 75,000