Engine Size: 2.0L
Refrigerant Type: R134a
Ambient Temp: 90F
Pressure Low: 30
Pressure High: 200
Country of Origin: United States
The A/C on my old Camry is giving me problems. When it operates the pressures look good, I watched it run fine and blow ice cubes for 15 minutes straight today, compressor running the whole time, then I cycled it off and back on and it cut out with the blinking light on the A/C switch after about five seconds. Before it cut out I noticed that the clutch was turning much slower than the pulley, so the good news is that the rotation sensor is working fine, but there's some other problem. The shop manual says the clutch should measure 3.6 - 4.0 ohms, I'm measuring 4.5 ohms when everything is hot. Also, seems more likely to work on initial start up than after running a while, but I need to gather more data before I can say for certain. I pulled the compressor and checked the clutch air gap, it is on the money. I'm guessing the magnetic clutch is weak, with performance degrading as it heats up, what do you guys think?
Make the gap as small as possible without it dragging when off. The resistance of the coil normally increases when hot, making the magnetic force weaker and requiring a smaller gap.
Sounds like the clutch is pulling in, but is slipping.
Is there something lubricating the clutch? Slung oil from a power steering pump, or crankshaft seal?
I would de-grease the clutch mating surfaces with some brake parts cleaner, then cycle the clutch a few times.
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.
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