Too Much Oil in the AC Compressor? - Team Camaro Tech
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post #1 of 5 (permalink) Old Jul 28th, 11, 05:10 PM Thread Starter
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Too Much Oil in the AC Compressor?

I was trying to charge my ac system today. I have decided my manifold gauges are absolutely worthless.

I wound up (partially) charging the system without the gauges, just going straight from the refrigerant can to the low port on the POA.

When I try to disconnect the charging hose from the low side port on the POA valve it spays compressor oil pretty bad until I have the hose completely disconnected.

Its a little like airing up a bicycle tire & trying to disconnect the (screw on) air fitting before too much air gets out.

Is it normal for ac oil to spray out of the POA port while disconnecting the hose?

Is this a sign I somehow put too much oil in the compressor?

Thanks
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post #2 of 5 (permalink) Old Jul 28th, 11, 09:50 PM
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Re: Too Much Oil in the AC Compressor?

A little oil misting when disconnecting the hose isn't necessarily a bad thing. say, a coating on your finger or so. If there is a puddle or more, then you might want to be concerned. The refrigerant is the vehicle to dispense the oil in the system. So, when the refrigerent escapes rapidly it carries a little oil too.

If you accurately measured the oil as you installed the components there should be plenty. You shouldn't have anything to worry about with a little mist-loss.....Jb.

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post #3 of 5 (permalink) Old Jul 28th, 11, 10:37 PM
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Re: Too Much Oil in the AC Compressor?

Losing a little during disconnect is inevitable

If you disconnect from the low side as the compressor is running, you won’t lose as much. The pressures are lower at this time. Disconnect from the high side after your system has been off and stabilized.

The exact amount of refrigerant oil is not critical if you have a little loss.

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post #4 of 5 (permalink) Old Jul 29th, 11, 02:05 PM
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Re: Too Much Oil in the AC Compressor?

Normal situation. I wrap a rag around it and try to do it as fast as possible. You don't really need the gauges for charging. Empty four 12 oz cans into it and you should be fine. Make sure you purge the lines between each can.

Dave

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post #5 of 5 (permalink) Old Jul 29th, 11, 02:13 PM
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Re: Too Much Oil in the AC Compressor?

Push in squarely on the hose fitting and spin the nut into place.
Safety glasses and leather gloves. It's a pain in the finger(s) in freezing them. Ask a friend who has had their skin/face frozen with liquid nitrogen, multiply the pain by a factor of three.

As said, a little loss is normal. Oil is fine. Purge the hoses. All previously said is part of the job.
I would think you would add freon on the suction side compressor fitting since the POA has more pressure from the fitting on it.

With R12, when the return/suction hose is frosted to within 3-4 inches of the compressor, it's cold.

The real pain is when the hose is disconnected, the Schrader valve does not close.

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