Too Much Oil in the AC Compressor? - Team Camaro Tech
Heating & Cooling Heating, cooling and air conditioning

LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old Jul 28th, 11, 05:10 PM Thread Starter
Senior Tech
Join Date: Aug 2001
Location: Dallas, Texas
Posts: 847
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?

327!275hp!Convt! is offline  
Sponsored Links
post #2 of 5 (permalink) Old Jul 28th, 11, 09:50 PM
Senior Tech
Join Date: Feb 2004
Location: Bloomingdale, Il
Posts: 507
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.

Beat it to Fit, Paint it to Match!
Johnny B is offline  
post #3 of 5 (permalink) Old Jul 28th, 11, 10:37 PM
Senior Tech
wagonman's Avatar
Join Date: Oct 2004
Location: northern california
Posts: 2,796
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.

Remember,I'm not making this stuff up!

1969 rs/ss 396 350hp/4spd conv a/c,pw,ps,foldown
1968 Z/28 crossram- j/l8 conv pw,ps,foldown
1963 nova ss 350/4spd conv a/c,ps,pt
1963 nova 400 4dr 6cyl/700r4 a/c
2006 GT/5spd mustang conv
wagonman is offline  
post #4 of 5 (permalink) Old Jul 29th, 11, 02:05 PM
Senior Tech
Join Date: May 2001
Location: Frisco, TX
Posts: 385
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.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

68RS/SS Convertible L48 (350/295 Powerglide)
daverichard is offline  
post #5 of 5 (permalink) Old Jul 29th, 11, 02:13 PM
Super Moderator
Bess-68's rule
Everett#2390's Avatar
Join Date: Sep 2000
Location: Va Beach VA
Posts: 32,167
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.

Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - Thank you, Joe Madden enjoy your next chapter.
Everett#2390 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome