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Charging Compressor with AC Pro #4465099
07/20/17 02:41 PM
07/20/17 02:41 PM
Joined: Mar 2017
Posts: 88
OK, USA
bradtech Offline OP
bradtech  Offline OP
Joined: Mar 2017
Posts: 88
OK, USA
Anyone had any experience with this stuff from Walmart? AC Pro Professional Formula Refrigerant


https://www.walmart.com/ip/AC-Pro-Profes...13=&veh=sem

Truck has been converted over to in past R134-a and grabbed a use compressor from salvage yard that has 90 warranty. Getting it charged elsewhere seems to be up to $100


17 Chevrolet Malibu 3k 5w30 AC Delco Full Syn
08 Hyundai Santa Fe 78k 5w20 GTX HM OEM Filter
93 Chevy S10 203k 10w30 GTX HM ACDELCO PF52E Filter
Re: Charging Compressor with AC Pro [Re: bradtech] #4465107
07/20/17 02:47 PM
07/20/17 02:47 PM
Joined: Aug 2008
Posts: 3,231
Where the wind comes sweepin'
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,231
Where the wind comes sweepin'
You have a leak if the refrigerant level isn't remaining the same year after year...

Re: Charging Compressor with AC Pro [Re: Reddy45] #4465109
07/20/17 02:48 PM
07/20/17 02:48 PM
Joined: Mar 2017
Posts: 88
OK, USA
bradtech Offline OP
bradtech  Offline OP
Joined: Mar 2017
Posts: 88
OK, USA
Yeah, I got a used compressor to put on. Don't have gauges. Was curious if this stuff was sufficient to put in with builtin gauge.

Originally Posted By: Reddy45
You have a leak if the refrigerant level isn't remaining the same year after year...


17 Chevrolet Malibu 3k 5w30 AC Delco Full Syn
08 Hyundai Santa Fe 78k 5w20 GTX HM OEM Filter
93 Chevy S10 203k 10w30 GTX HM ACDELCO PF52E Filter
Re: Charging Compressor with AC Pro [Re: bradtech] #4465110
07/20/17 02:50 PM
07/20/17 02:50 PM
Joined: Nov 2008
Posts: 3,275
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,275
Oshawa, Ontario Canada
I haven't used that brand, but I prefer to use a manifold set like the ones from Harbor freight and buy the small cans of R134a.

https://m.harborfreight.com/ac-r134a-manifold-gauge-set-60806.html?utm_referrer=direct%2Fnot%20provided

That manifold set will let you get a more accurate reading of the high and low pressures and the hoses are longer which sometimes you need. I had a 98 sienna and the low side port was back near the firewall and with a small hose you always risked burning yourself even with coveralls on. As you had to lean over the engine.

Last time I bought r134a I was able to get the small cans from Big Lots for around $5 a can.


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: Charging Compressor with AC Pro [Re: bradtech] #4465111
07/20/17 02:51 PM
07/20/17 02:51 PM
Joined: Jun 2002
Posts: 2,040
southwest Mo.
wtd Offline
wtd  Offline
Joined: Jun 2002
Posts: 2,040
southwest Mo.
Don't use anything that has a sealer in it. Just straight R134. That stuff says it seals leaks so I would not use it. Using a can like that is also not the correct way to recharge an AC system. It needs to be vacuumed down to boil the moisture out and to see if you have a leak somewhere. You then charge into the vacuum created by the vacuum pump with the correct amount of refrigerant.

Wayne


2014 Mustang GT
1998 Chevy K3500
1998 Chevy K1500
(2) 1992 Cavaliers
1970 Monte Carlo
Re: Charging Compressor with AC Pro [Re: bradtech] #4465115
07/20/17 02:52 PM
07/20/17 02:52 PM
Joined: Apr 2013
Posts: 2,417
The Northeast
mclasser Offline
mclasser  Offline
Joined: Apr 2013
Posts: 2,417
The Northeast
+1 on avoiding any stuff with stop leak in it.


2018 Hyundai Elantra VE -- 6K
2013 Honda Pilot EX-L 4WD -- 57K
2002 Honda Accord EX-L -- 212K

Re: Charging Compressor with AC Pro [Re: bradtech] #4465119
07/20/17 02:55 PM
07/20/17 02:55 PM
Joined: Dec 2005
Posts: 689
Virginia
cpayne5 Offline
cpayne5  Offline
Joined: Dec 2005
Posts: 689
Virginia
In my area, WalMart has their Supertech branded 12oz r134a on shelves for under $5/can. I'd use that over the more expensive A/C Pro. Use the savings to buy a set of gauges. smile

The gauges are helpful for when you pull a vacuum too (can see if the system holds...).

Re: Charging Compressor with AC Pro [Re: bradtech] #4465136
07/20/17 03:11 PM
07/20/17 03:11 PM
Joined: Oct 2015
Posts: 221
KS
DerbyDave Offline
DerbyDave  Offline
Joined: Oct 2015
Posts: 221
KS
Did your old compressor fail? Did you flush the system before putting on the used replacement? What about replacing the filter drier? Are you planning on pulling a vacuum before you charge the system? If you don't do this stuff it won't matter how you charge the system or what product you use.


1997 Ford Taurus
2007 Honda Ridgeline
2003 Suzuki GZ250
1986 Suzuki Cavalcade
2014 Nissan LEAF (Gone)
Re: Charging Compressor with AC Pro [Re: bradtech] #4465146
07/20/17 03:17 PM
07/20/17 03:17 PM
Joined: Aug 2009
Posts: 3,920
Pittsburgh,PA U.S.A.
JimPghPA Offline
JimPghPA  Offline
Joined: Aug 2009
Posts: 3,920
Pittsburgh,PA U.S.A.
When you opened the system to install the new to you compressor you completely lost the old refrigerant charge and also let air into the system. After you install the new to you compressor the system has to be pumped down with a vacuum pump before it can be charged with new refrigerant. And the amount of refrigerant needed to charge your completely empty system is way more than you get from only one can of AC Pro. It is best to charge a completely empty system using gauges that let you see what the high side and low side pressures are.

In short, you really should take it to someone who works on vehicle AC systems for a living because they will have a vacuum pump to vacuum out all the air (and any moisture that is in that air) and they will know how to charge a system.


Boy will I be happy when ALL vehicles on public roads are autonomous.


JimPghPa

Re: Charging Compressor with AC Pro [Re: bradtech] #4465153
07/20/17 03:21 PM
07/20/17 03:21 PM
Joined: Aug 2009
Posts: 3,920
Pittsburgh,PA U.S.A.
JimPghPA Offline
JimPghPA  Offline
Joined: Aug 2009
Posts: 3,920
Pittsburgh,PA U.S.A.
AC Pro is meant to be used to top off a system that has lost some its charge due to a very small leak. It is not anywhere near enough to charge a completely empty system, and you have to pull a vacuum on the system with a vacuum pump to get all the air and moisture out of the system before you can charge it.


Boy will I be happy when ALL vehicles on public roads are autonomous.


JimPghPa

Re: Charging Compressor with AC Pro [Re: DerbyDave] #4465156
07/20/17 03:23 PM
07/20/17 03:23 PM
Joined: Dec 2016
Posts: 7,117
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,117
Waco, TX
Originally Posted By: DerbyDave
Did your old compressor fail? Did you flush the system before putting on the used replacement? What about replacing the filter drier? Are you planning on pulling a vacuum before you charge the system? If you don't do this stuff it won't matter how you charge the system or what product you use.


+ 100 !!!!!!


"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: Charging Compressor with AC Pro [Re: bradtech] #4465182
07/20/17 03:42 PM
07/20/17 03:42 PM
Joined: Sep 2007
Posts: 1,022
TX, USA
JMJNet Offline
JMJNet  Offline
Joined: Sep 2007
Posts: 1,022
TX, USA
Did you pull the vacuum in the AC system yet?
If not, you need to do it first regardless of the gauge used.

For this you need either a vacuum pump or a compressor and a venturi pump.

When the system can hold the vacuum for at least a couple of hours after pulling the vacuum, then you can charge it.

Last edited by JMJNet; 07/20/17 03:43 PM.

  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: Charging Compressor with AC Pro [Re: bradtech] #4465189
07/20/17 03:54 PM
07/20/17 03:54 PM
Joined: Sep 2016
Posts: 163
MN
Tman220 Offline
Tman220  Offline
Joined: Sep 2016
Posts: 163
MN
If the vehicle has a variable displacement compressor the gauges really only serve as a reference and an apparatus for pulling the vacuum and adding the refrigerant.

Its more important to add refrigerant from empty by the weight listed as its total capacity. The system will adjust displacement of the compressor in order obtain about 35-39 PSI on the low side, therefore adding refrigerant based on pressure shown on the gauges is almost meaningless once the system reaches a point where it can maintain the set pressure on the low side.

with a set displacement compressor you'll have to look up what the best practices are for that application. For example, charging to specific high and/or low side pressures with the AC on high, on an 85 degree day, with the radiator fan on high, engine RPM at X,XXX, etc.


2012 Regal GS Turbo PP 5w30
1994 Camaro Z28 LT1 355 CI, 430 RWHP PP 5W30
Re: Charging Compressor with AC Pro [Re: bradtech] #4465257
07/20/17 04:56 PM
07/20/17 04:56 PM
Joined: Oct 2009
Posts: 3,947
Ohio
L_Sludger Offline
L_Sludger  Offline
Joined: Oct 2009
Posts: 3,947
Ohio
Professionals don't use stop leak stuff.
Professionals charge an arm and a leg to find a leak, fix it using $.25 O-ring seals, and then recharge with straight up, cheap formula R134a.


too many cars and oil combinations to list in 150 characters or less
Re: Charging Compressor with AC Pro [Re: bradtech] #4465319
07/20/17 05:45 PM
07/20/17 05:45 PM
Joined: Jan 2004
Posts: 4,433
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,433
California
Use that AC Pro stuff only if the car is on its last legs or if fixing the AC the right way is too expensive. I doubt a 1993 S-10 has a variable displacement compressor, it probably uses an old school Harrison R4 compressor or similar.

You need to pull a vacuum to evacuate the system and boil off any residual moisture - AZ rents out pumps last time I checked and it should be charged by weight ideally. The best DIYers can do is charge according to pressure and get close enough.

Flushing the system, replacing the orifice tube and accumulator aren't a bad idea, the former is highly recommended. Did the compressor fail? Parts for older GM systems aren't terribly expensive.

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