Flushing; In the past 15 years, I have broken apart and flushed the entire system on my two W126s at least a total of four times (2 each), flushing evap, condenser, lines, replacing dryer, exp valve and new condenser, new compressor hoses, 8oz oil just like fsm, rotating 15 times before mounting., ect.

Flushing with approved chemicals and dried shop air (more than most shop do). I flushed even when compressor did not fail and was weak (as in now) also when failed, never saw any metal particles at all, just oil and dye. To really flush right you need a two way powerfull electric/air machine like the hellcat power flusher. No shops in my area ever use such a machine. Anybody here use one?

Anyway....My 1995 GMC at 198,000 miles, still has the original Delco/Harrison R4 compressor with oe 134A. Again it is mounted on top of engine with ports up (with o-ring sealing washers) (x) up and refrigerant oil flows down onto the bearing and shaft seal as it is designed.

MY current R4 on my 1984 MB is working but the the clutch/bearing is now making noise beacuse it has been starved for oil after 3 years.

I will reclaim/recycle the R12 freon, change out to the Four Season reman, look at discarge ports and hoses for any trace of failure (black death, ect) if it looks good. I will seal up, pulll a long vac, with my JB 2 stage deep vac pump with fresh oil. Then Clipligt Dry R for moisture and acid, then cliplight super seal Auto, dye/oil, and R12.

I am going to hunt up a 1986 300SDL in the salavge yard and try to fabricate a mount, v-belt pulley and compressor hoses so I can do a denso next year and be thru with this R4 crap and get better performance and lifespan.

__________________
1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

609 Certification