I found a Delphi-Delco Harrison R4 off a 1983 W126 in the local salvage yard. Lines had OE R12 fittings. Freon was still holding when removed (heard a hiss). Also got the manifold hoses that connects to it.

Rinsed/flushed with mineral oil. Turns real easy and smooth by hand, no hard or rough feeling spots. I covered the ports with finger and can feel a suck on the suction and a pop on the discharge port when I turn clutch by hand. No metal contamination comming out, clutch clicks and moves when 12 volts applied.

Does a good R4 turn easy by hand? If so, should I give it a try and swap it out? Also anyone know who could do a fabricate job on my a/c compressor manifold hose to put a filter/connection and redo the rubber parts? If so where do I put it on the suction side or discharge?

There was a thread on this salvage R4 issue a few months back but I searched and could not find it.

Thanks for the help.

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1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
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1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

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