FAN CLUTCH-OK? AC Problems
My cousin has a '93 Ranger. I'm embarrassed to say I didn't notice the engine size. 4 cylinder, I think. It has a plastic fan with a traditional thermostatic fan clutch. The clutch feels about right to me- a little drag cold, but turns. It has some axial play, though. Not enough to see visibly, but you can feel it if you hold the fan with both hands.
Here's the story. He had a universal aftermarket A/C compressor (R12) installed a couple weeks ago. The first compressor leaked out all the oil and refrigerant overnight, so they replaced it. The second one works OK, but has a tee on one of the fittings that leaks almost constantly. It seems to be a relief valve sort of setup, but nothing I'm familiar with. I work on R134 systems all the time, but don't know much about R12 systems. Was a relief common on them, and would there be a case they could leak under normal operation?
The garage told them the fan clutch was loose, and this was causing the refrigerant to "boil over." If this is referring to the leaking fitting, they're full of it. It does it at cold idle when you can put your hand on the engine. Like I said above, the fan clutch doesn't seem to be causing any problems anyway. The compressor clutch disengages every time you rev the engine, so I'm thinking they overcharged the system, and don't know how to diagnose it. I can't believe they replaced the compressor and drier and never even mentioned the possibility of conversion to R134.