AC recharge...adding oil????
Thread Starter
Racer
Joined: Apr 2007
Posts: 336
Likes: 0
From: Bruce WI
AC recharge...adding oil????
I came up with a can of R-12 but I want to add some oil also. Its been leaking at the compressor over the years and i'm sure it needs some. Looking for ideas on how to add it. My plan was, the hose I have to add the R-12 is about 2 feet long and I was going to fill that hose with the oil and then hook up the hose and can and do the charge, possibly stopping at the half can point and refilling the hose with oil again. My thought was this would draw the oil in just like it draws in the R-12??? Any ideas would be appreciated 
Burning Brakes
Joined: Feb 2009
Posts: 785
Likes: 3
From: Richmond Virginia
When doing a full Evac and Recharge..I have used the vacuum created in the system by the "evac" to pull the oil (usually about 2 oz) through the same "charge" hose used to add freon. I have a cartidge I use on the job when just topping off the AC (it holds 2 oz) which is pushed in by the freon charge and the compressor helps to suck it in. I think in your case I'd also check some parts stores.... years ago I used to see small cans of oil charge under pressure which worked w/the same "can tap" used for freon. Not saying your idea wouldn't work...just not sure how accurate you could be. JMO
Racer
Joined: Nov 2005
Posts: 456
Likes: 3
From: Sumner Texas
It doesn't sound if you are planning on evacuating, only topping off the system. Under these conditions, an injector is the best way. I doubt that you will find an R12 oil charge can anywhere.
That said, adding oil to a system without complete flushing, new R/D and evacuation is a guessing game at best. Sometimes you will lose a lot of oil with a leak and other times maybe not any. Did you find an oily residue at the suspected location of the leak?
That said, adding oil to a system without complete flushing, new R/D and evacuation is a guessing game at best. Sometimes you will lose a lot of oil with a leak and other times maybe not any. Did you find an oily residue at the suspected location of the leak?
Thread Starter
Racer
Joined: Apr 2007
Posts: 336
Likes: 0
From: Bruce WI
its leaking at the compressor, slinging a small amount of oil on the underside of the hood. This has been over the course of 23 years. Its a common place for a leak. I dont think the leak is severe but thats a long time so I'd like to add some oil when I add the R-12. I would like to get at least 3-4 oz. back in. I'm thinking filling the hose twice will be enough, just wondered if the system will have enough suction to pull the oil in??
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
^^Things I've heard....and since Florine is very corrosive....take the time to get that oil off the underside of your hood ASAP.
Some have told stories of that oil eating the SMC all the way through to the outside surface of the hood.....completely ruining the hood.
Some have told stories of that oil eating the SMC all the way through to the outside surface of the hood.....completely ruining the hood.
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Instructor
Joined: Jul 2007
Posts: 132
Likes: 0
From: Austin Texas
its leaking at the compressor, slinging a small amount of oil on the underside of the hood. This has been over the course of 23 years. Its a common place for a leak. I dont think the leak is severe but thats a long time so I'd like to add some oil when I add the R-12. I would like to get at least 3-4 oz. back in. I'm thinking filling the hose twice will be enough, just wondered if the system will have enough suction to pull the oil in??
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
OK, here's the deal.
All the 134a retrofit kits come with a small can of esther oil. and yes they go right in through the same hole with the same hose.
If you have a hose and your system is low..the compressor may not kick on at all. You may need to put one can in to get the system going.
All the 134a retrofit kits come with a small can of esther oil. and yes they go right in through the same hole with the same hose.
If you have a hose and your system is low..the compressor may not kick on at all. You may need to put one can in to get the system going.
Racer
Joined: Nov 2005
Posts: 456
Likes: 3
From: Sumner Texas
That's all well and good, but this is an R12 that he is wisely keeping as an R12 system.
The system only contains 8 ounces of oil when properly charged. From what you are saying I think that 3 or 4 ounces would be too much. I would put in a couple of ounces tops. That said, it's a guessing game.
My $0.02,
Doc
The system only contains 8 ounces of oil when properly charged. From what you are saying I think that 3 or 4 ounces would be too much. I would put in a couple of ounces tops. That said, it's a guessing game.
My $0.02,
Doc
Racer
Joined: Apr 2005
Posts: 294
Likes: 0
From: High Point NC
Get a can or two of this:http://cgi.ebay.com/ebaymotors/R12-T...5%3A1%7C39%3A1
Not mine, but I remembered seeing this before. contains 1.4oz oil and couple ounces r12.
Not mine, but I remembered seeing this before. contains 1.4oz oil and couple ounces r12.
Thread Starter
Racer
Joined: Apr 2007
Posts: 336
Likes: 0
From: Bruce WI
did it this weekend, the hose held 3 oz. of oil and it took the 12 oz. can of R-12. Worked like a charm and it blows ice cubes again! The hardest part of the job is getting your hands on the R-12. Thanks for the input guys
