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How much refrigerant is in a can? #4771400
05/29/18 05:07 PM
05/29/18 05:07 PM
Joined: Mar 2013
Posts: 1,029
NY
joegreen Offline OP
joegreen  Offline OP

Joined: Mar 2013
Posts: 1,029
NY
So i am in the process of buying refrigerant to fill my vehicle. It seems like an easy enough question but i couldnt find any info online. Lets say i have a can of r134a and it says net weight 12oz. Does that mean the can contains 12oz of refrigerant or does the can and refrigerant weight 12oz? Im just trying to figure out how many cans of r134a i need.

Last edited by joegreen; 05/29/18 05:08 PM.

1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: How much refrigerant is in a can? [Re: joegreen] #4771401
05/29/18 05:09 PM
05/29/18 05:09 PM
Joined: Dec 2005
Posts: 11,496
Upper Midwest
kschachn Offline
kschachn  Offline

Joined: Dec 2005
Posts: 11,496
Upper Midwest
Originally Posted By: joegreen
So i am in the process of buying refrigerant to fill my vehicle. It seems like an easy enough question but i couldnt find any info online. Lets say i have a can of r134a and it says net weight 12oz. Does that mean the can contains 12oz of refrigerant or does the can and refrigerant weight 12oz? Im just trying to figure out how many cans of r134a i need.

http://www.businessdictionary.com/definition/net-weight.html


1994 BMW 530i, 242K
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Re: How much refrigerant is in a can? [Re: joegreen] #4771414
05/29/18 05:22 PM
05/29/18 05:22 PM
Joined: Dec 2006
Posts: 8,534
Illinois
mrsilv04 Offline
mrsilv04  Offline

Joined: Dec 2006
Posts: 8,534
Illinois
You have to read the can. Some will have a small amount of oil in them as well.

I have a 12 ounce can in the garage, which is labelled as containing 11.3 ounces of R-134a, and .7 ounces of refrigerant oil.


2004 Silverado - on its 3rd Jasper engine in less than one year.
Re: How much refrigerant is in a can? [Re: joegreen] #4771415
05/29/18 05:23 PM
05/29/18 05:23 PM
Joined: Mar 2017
Posts: 880
Western Ma.
rollinpete Offline
rollinpete  Offline

Joined: Mar 2017
Posts: 880
Western Ma.
Usually under the hood some where, it will tell you how much you need, for your system.
Got to go from there.


Pete.

97 Ford Expl.Sport 4.0 ohv 4wd 5spd 187k miles
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PP, PPHM 50/50 5w30

Currently under the influence of oil shocked2

Re: How much refrigerant is in a can? [Re: joegreen] #4771428
05/29/18 05:42 PM
05/29/18 05:42 PM
Joined: Mar 2008
Posts: 8,421
USA
slacktide_bitog Offline
slacktide_bitog  Offline

Joined: Mar 2008
Posts: 8,421
USA
"net weight" is the weight of just the contents inside the can smile

"tare weight" is the weight of the container itself, and "gross weight" is the "net"and "tare" weights

Re: How much refrigerant is in a can? [Re: rollinpete] #4771589
05/29/18 08:00 PM
05/29/18 08:00 PM
Joined: Mar 2013
Posts: 1,029
NY
joegreen Offline OP
joegreen  Offline OP

Joined: Mar 2013
Posts: 1,029
NY
Originally Posted By: rollinpete
Usually under the hood some where, it will tell you how much you need, for your system.
Got to go from there.
I need 1lb 14oz. Im just trying to figure out how many cans i need to buy is all


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: How much refrigerant is in a can? [Re: kschachn] #4771591
05/29/18 08:02 PM
05/29/18 08:02 PM
Joined: Mar 2013
Posts: 1,029
NY
joegreen Offline OP
joegreen  Offline OP

Joined: Mar 2013
Posts: 1,029
NY
Originally Posted By: kschachn
Originally Posted By: joegreen
So i am in the process of buying refrigerant to fill my vehicle. It seems like an easy enough question but i couldnt find any info online. Lets say i have a can of r134a and it says net weight 12oz. Does that mean the can contains 12oz of refrigerant or does the can and refrigerant weight 12oz? Im just trying to figure out how many cans of r134a i need.

http://www.businessdictionary.com/definition/net-weight.html
Thanks i understand now


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: How much refrigerant is in a can? [Re: slacktide_bitog] #4771593
05/29/18 08:02 PM
05/29/18 08:02 PM
Joined: Mar 2013
Posts: 1,029
NY
joegreen Offline OP
joegreen  Offline OP

Joined: Mar 2013
Posts: 1,029
NY
Originally Posted By: slacktide_bitog
"net weight" is the weight of just the contents inside the can smile

"tare weight" is the weight of the container itself, and "gross weight" is the "net"and "tare" weights
Thanks


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: How much refrigerant is in a can? [Re: joegreen] #4771594
05/29/18 08:02 PM
05/29/18 08:02 PM
Joined: Mar 2013
Posts: 1,029
NY
joegreen Offline OP
joegreen  Offline OP

Joined: Mar 2013
Posts: 1,029
NY
Looks like ill get 3 cans and put 2.5 cans in.

Last edited by joegreen; 05/29/18 08:03 PM.

1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: How much refrigerant is in a can? [Re: joegreen] #4771650
05/29/18 08:39 PM
05/29/18 08:39 PM
Joined: Jun 2009
Posts: 3,872
Chicago, IL
tomcat27 Offline
tomcat27  Offline

Joined: Jun 2009
Posts: 3,872
Chicago, IL
Is your system totally empty and do you have a vacuum pump?


2019 Cherokee, 2018 Jetta, 2014 Sentra, 2001 Camry, 1995 Escort, 1970 Cougar, 2013 XT250, 2010 Vstar, 2014 CTX1300
Re: How much refrigerant is in a can? [Re: joegreen] #4771752
05/29/18 10:09 PM
05/29/18 10:09 PM
Joined: Dec 2016
Posts: 8,880
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,880
Waco, TX
There's usually enough reserve in the accumulator to handle that last 1/2 a can


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: How much refrigerant is in a can? [Re: joegreen] #4771754
05/29/18 10:12 PM
05/29/18 10:12 PM
Joined: May 2010
Posts: 10,196
out there
spasm3 Offline
spasm3  Offline

Joined: May 2010
Posts: 10,196
out there
It seems to me that the old r12 system worked well even when undercharged or overcharged a bit. It seems to me that with the r134a systems , there is a fine line between undercharged and overcharged.


13 elantra 75k 5w30 QSUD
03 chevy avalanche 80k synpwr 5w30
17 mazda cx-5 9500 miles m1 0w30
Re: How much refrigerant is in a can? [Re: tomcat27] #4778394
06/05/18 05:28 PM
06/05/18 05:28 PM
Joined: Mar 2013
Posts: 1,029
NY
joegreen Offline OP
joegreen  Offline OP

Joined: Mar 2013
Posts: 1,029
NY
Originally Posted By: tomcat27
Is your system totally empty and do you have a vacuum pump?
Yes the system is totally empty. I have a gauge set and a vacuum pump. Anyway the a/c is all repaired now. thanks


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: How much refrigerant is in a can? [Re: spasm3] #4778446
06/05/18 06:29 PM
06/05/18 06:29 PM
Joined: Jan 2004
Posts: 5,270
California
nthach Offline
nthach  Offline

Joined: Jan 2004
Posts: 5,270
California
Originally Posted By: spasm3
It seems to me that the old r12 system worked well even when undercharged or overcharged a bit. It seems to me that with the r134a systems , there is a fine line between undercharged and overcharged.

Depends on the system as well, new AC systems are very sensitive to oil and refrigerant charge. That old GM accumulator and orifice tube system can tolerate some overcharge.

If you charged in with all 3 cans, I don't think an extra 5 oz of R-134a will hurt anything. You lost some while changing out cans, purging the charging hose and gauges.

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