| Can AC oil be added after the system is charged? [message #258498] |
Mon, 11 August 2014 11:29  |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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rebuilding my Dash AC. all new stuff.
It also has an evap under the couch I got from a conversion van so I have no idea how much it and the big ol lines running to it will require.
So how do I determine how much oil to add to it?
is there anyway to add oil after the fact with out purging the system and doing it twice ( and hopefully not trashing my new compressor in the process?
Thanks
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: Can AC oil be added after the system is charged? [message #258508 is a reply to message #258498] |
Mon, 11 August 2014 15:28  |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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There are tools available that will pressure oil in right past the schrader valve using a screw-powered piston in a cylinder. May be able to find it online, look for "oil injector". I think someone posted guide lines for oil capacity on here just recently, look at the duracool posts.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| Re: Can AC oil be added after the system is charged? [message #258515 is a reply to message #258512] |
Mon, 11 August 2014 17:12 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Wally World has a small pressurized can of PAG A/C oil for $5. Very small can, probably 1 1/2 in diameter and about 4 inches tall. Hard to see, in with all the big stuff, where they hide the R134a.
I don't have a clue on how to gauge the amount of oil to addd into your A/C system.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: Can AC oil be added after the system is charged? [message #258607 is a reply to message #258585] |
Tue, 12 August 2014 15:36 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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I found the manufacturer online and found their installation guide. The recommend 14 to 16 oz of 134 ( depending on the vehicle ) and 3 oz of oil.
I think I will call them however and verify.
I'll make sure to be on the high side, but not too high
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: Can AC oil be added after the system is charged? [message #258631 is a reply to message #258607] |
Tue, 12 August 2014 19:50 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Want to know how to put oil in a system without the fancy injector thing??
Well, it turns out that because of my being placed in awkward positions during my lengthy but lackluster collection of experience, that I probably know a cheap and sleazy way to do a lot of things that require special tools than many people would want to hear about.
This one takes a used small refrigerant can with the tapper, some oil and the syringe that you use either for putting oil in sealed ball bearings or filling ink jet cartridges. (If it is the later, this will be its last trip.)
Take the tapper off the can, put oil in the can. Put the tapper back on Open.
Connect your service manifold to the system.
Connect the manifold to the tapper.
Open the high side into the tapper for just a moment and shut it off.
Crack the access on the tapper and bleed off what is there. This is just to minimize the amount of air you will have there.
Start the system.
Open the high side into the can. It may get hot.
Close off the high side, invert the can and open the low side.
Oil is going into the system.
You may have to repeat the high - low bit a couple of times to get all the oil out of the hose and can.
By the way, the A6 compressor actually has an oil space at the bottom and is very un-fussy about oil fill.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Can AC oil be added after the system is charged? [message #258665 is a reply to message #258498] |
Wed, 13 August 2014 03:13 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Uhhh... Never open the high side into the can, unless you want to blow up the can... I can understand that this method is possible, and if one is experienced, can be done with relative safety, so long as one knows how long to leave the valve open, but telling people who don't know a 1/4-20 from a cotter pin to do this is asking for trouble.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: Can AC oil be added after the system is charged? [message #258666 is a reply to message #258631] |
Wed, 13 August 2014 05:09 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Matt,
I have done a similar thing with my inverted 30 pound R-134 tank as the pressure source. This way the empty can with just oil in it ended up near full of liquid and does not exceed it's design pressure.
The problem with my approach is when charging the oil / r-134 mix is you are also adding extra refrigerant to the system.
I have never tried it with Duracool because I do not have a large tank of Duracool. I guess it could be done with small cans.
I like your approach of using the refrigerant already in the system. This eliminates the problem of adding unwanted extra refrigerant.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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