| 4/12/2015 1:44:38 AM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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Is it absolutely necessary to evacuate the system to swap the compressor? Will relieving the pressure be enough to take out the old compressor?
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| 4/12/2015 8:50:48 AM |
A/c compressor question |
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1irving
Ruskin, FL
57, joined Mar. 2013
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If you want it to work. Removing air and moisture is critical to proper a/c function. Also, having air/moisture contamination can lead to "Black Death" a horrible sludge of aluminum, oil, water black crap that will ruin a system for ever. By all means, just charge it with Walmart Freon in a can. It makes it more profitable for the pro who has to fix it. Also, if the compressor has disintegrated, an in-line filter in the suction line will be necessary.
I'm just talking out my ass, I really don't know anything about mobile climate control.
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| 4/12/2015 2:00:55 PM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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I appreciate all the history and all that shit but doesn't answer my question.
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| 4/12/2015 8:27:34 PM |
A/c compressor question |
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tbirdracer
Gainesville, GA
54, joined Nov. 2007
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To remove the compressor in a pressurized system, you need to UN-pressurize it. If you are going to install a new compressor and want the A/C to work properly, it will need to be evacuated and repressurized. There is a lot more...
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| 4/12/2015 9:31:02 PM |
A/c compressor question |
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kraven_morehed
Greenwood, LA
96, joined Jul. 2014
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no,it is not ABSOLUTELY NECCESSARY to pull a vacuum/evacuate the system when you swap a compressor out,as long as the system has not been left open for a long period of time,so that air&moisture has a chance to get inside the lines,but it will work a little better if you do.
you can also just purge the system,though,to force any air that has gotten in the lines out by leaving a fitting on the far end of the charging loop open until some of the freeon you are putting in starts coming back out,which will push anything that is already in the lines out.
that is called positive pressure evacuation,instead of negative pressure evacuation.[pulling a vacuum on the system]
i only recommend that method if you are using an enviornmentally friendly form of freeon,though,like R-134a.
[Edited 4/12/2015 9:34:02 PM ]
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| 4/13/2015 12:52:26 PM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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no,it is not ABSOLUTELY NECCESSARY to pull a vacuum/evacuate the system when you swap a compressor out,as long as the system has not been left open for a long period of time,so that air&moisture has a chance to get inside the lines,but it will work a little better if you do.
you can also just purge the system,though,to force any air that has gotten in the lines out by leaving a fitting on the far end of the charging loop open until some of the freeon you are putting in starts coming back out,which will push anything that is already in the lines out.
that is called positive pressure evacuation,instead of negative pressure evacuation.[pulling a vacuum on the system]
i only recommend that method if you are using an enviornmentally friendly form of freeon,though,like R-134a.
My system is good ..it blows cold air but the pulley bearing has given out and making that annoying squeak.
it's a 2002 accord so I'm sure its R-134a ...so you're saying I can relieve the pressure from either low or high hoses ...so the hiss is minimal on the compressor end when I take it out?
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| 4/13/2015 2:39:07 PM |
A/c compressor question |
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tbirdracer
Gainesville, GA
54, joined Nov. 2007
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Yes.
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| 4/13/2015 4:19:23 PM |
A/c compressor question |
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luckylouie42
Cedar Grove, WV
75, joined Mar. 2008
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cant you just change the pully
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| 4/14/2015 9:32:20 AM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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cant you just change the pully
I'm considering that ....my only concern is the splines ...if they match then I will go that route so I don't have to worry about the dang system pressure. ...
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| 4/14/2015 9:53:34 AM |
A/c compressor question |
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1irving
Ruskin, FL
57, joined Mar. 2013
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(this post has been flagged as inappropriate, sorry.)
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| 4/14/2015 8:37:43 PM |
A/c compressor question |
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rn2290
Mount Dora, FL
27, joined Jul. 2014
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If you do not evacuate the refrigerant and you continue to take lines off, you have 150 psi and around 3LBS of A/C refrigerant (R134A) that is going to BLOW out and all into the air around you and your face. People die from this stupidity. I can 100% guarantee you will be going to the hospital if you proceed without evacuating the system.
Certified technician and have my EPA 609 Certification. Also, releasing A/C refrigerant into the air on purpose like that is a nice $10,000 fine.
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| 4/14/2015 9:42:46 PM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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I appreciate the bragging but i need facts and boy you got your facts wrong end up....there's less 2 pounds of refrigerant in this car and pressure tops at 50 psi ...get your money back from whoever you bought that certification from....
Don't worry I know all about the laws and fines associated with this project....google is my friend and you certainly don't qualify to dispense this sort of judgment.
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| 4/15/2015 9:01:37 AM |
A/c compressor question |
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luckylouie42
Cedar Grove, WV
75, joined Mar. 2008
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hmmmm the discussion of changing an air conditioner compressor, is becoming ugly 
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| 4/16/2015 3:47:40 PM |
A/c compressor question |
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rn2290
Mount Dora, FL
27, joined Jul. 2014
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You are a moron and I do this every day for a living and have been for 5 years now. The low side will run around 35psi when operating so when it's running. The high side is around 200psi when running. When off the low side will be around ambient temp so here in fl that's somewhere around 100ps when it's OFF. You sir have no clue what you are talking about as well as everyone else commenting. Continue to do what you want and enjoy the trip to the hospital. A/c refrigerant in a vehicle will run anywhere from 1.5lbs to over 4 in something like a diesel pickup. Average is around 3
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| 4/16/2015 3:50:17 PM |
A/c compressor question |
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rn2290
Mount Dora, FL
27, joined Jul. 2014
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609 certification also has NOTHING to do with a vehicle itself. It's simply a certification that you need to work on a/c systems legally, and to purchase AC refrigerant. Not those cans you buy at napa or wherever that's filled halfway with sealer. Everything I have said so far is 100% accurate and correct. Maybe you need to learn how to use google.
You are the dumbass asking a common sense question about needing to evacuate an AC system before compressor removal. If you know so much how come you don't know something they teach the first day of high school automotive. Like I said before. Venting refrigerant into the atmosphere is a $10,000 fine
[Edited 4/16/2015 3:53:24 PM ]
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| 4/17/2015 12:20:31 AM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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So bottom lines you're saying its absolutely necessary to evacuate system to change the compressor? That's evacuate, meaning everything inside the system...compressor condensers and all that ...50bucks at jiffy lube ...refill at another 50 bucks ...is that about right?
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| 4/25/2015 3:28:24 PM |
A/c compressor question |
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lewiske
Loganville, GA
51, joined Oct. 2013
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609 certification also has NOTHING to do with a vehicle itself. It's simply a certification that you need to work on a/c systems legally, and to purchase AC refrigerant. Not those cans you buy at napa or wherever that's filled halfway with sealer. Everything I have said so far is 100% accurate and correct. Maybe you need to learn how to use google.
You are the dumbass asking a common sense question about needing to evacuate an AC system before compressor removal. If you know so much how come you don't know something they teach the first day of high school automotive. Like I said before. Venting refrigerant into the atmosphere is a $10,000 fine
Lmao !!!!!
I've been repairing wrecked cars 24 yrs and love it when people ask something and then ignore you !!!
Google. Lol
My certificates are ASE and ICAR in welding and even PPG for painting
Evacuate the system. I've seen ac systems let go before and there's a lot of pressure
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| 4/26/2015 5:37:49 PM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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Lmao !!!!!
I've been repairing wrecked cars 24 yrs and love it when people ask something and then ignore you !!!
Google. Lol
My certificates are ASE and ICAR in welding and even PPG for painting
Evacuate the system. I've seen ac systems let go before and there's a lot of pressure
Lmfao
I love it when people are asked for advice then they get pissed when you ignore them lol
There's this saying that goes....there's more than one way to skin a cat ....and rarely does the advice cover all those ways 
Google is not the authority on all things....its one of them advisors. .duh
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| 4/27/2015 6:02:18 PM |
A/c compressor question |
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luckylouie42
Cedar Grove, WV
75, joined Mar. 2008
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several people have tried to help this fool, and he just seem to want to stir up shit.
I wont try to help him again.
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| 4/27/2015 9:40:34 PM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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Really? This from a guy who can't figure brakes out ?
Pffft grandpa
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| 4/28/2015 7:38:42 PM |
A/c compressor question |
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ninjazx9r
Largo, FL
48, joined Apr. 2010
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Plain and simple:
Evacuating system removes moisture and puts a negative atmosphere in system. In turn it creates a clean and proper environment for freon to be pulled into by negative atmosphere. Which will make your A/C blow colder.
You don't have to evacuate system but you do have to depressurize before starting any work.
You should also replace dryer when replacing anything with A/C systems.
Evacuating system is for after repairs to prepare a dry environment for freon.
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| 4/29/2015 1:17:51 AM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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Plain and simple:
Evacuating system removes moisture and puts a negative atmosphere in system. In turn it creates a clean and proper environment for freon to be pulled into by negative atmosphere. Which will make your A/C blow colder.
You don't have to evacuate system but you do have to depressurize before starting any work.
You should also replace dryer when replacing anything with A/C systems.
Evacuating system is for after repairs to prepare a dry environment for freon.
Thank you ...that's what I'm asking ....I'm just replacing the compressor because the pulley bearing has failed ....it blows cold air and the clutch engages its just squicky noisy when turned on otherwise the system is fine. You're saying I still have to replace the dryer?
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| 4/30/2015 11:02:49 AM |
A/c compressor question |
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ninjazx9r
Largo, FL
48, joined Apr. 2010
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You don't have to but anytime you open an A/C system it is recommended to replace dryer. It's just good sense to do it. Plus most dryers only run about $40.
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| 4/30/2015 11:15:36 AM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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If I did that wouldn't that necessitate evacuation?
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| 4/30/2015 11:10:13 PM |
A/c compressor question |
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ninjazx9r
Largo, FL
48, joined Apr. 2010
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No by installing a new dryer it does not compensate for evacuating system. Evacuating system does more then just drying the humidity out of air as i already stated.
Look at it this way. If you take an empty squirt bottle and squeeze it then stick nozzle in water. When you release the bottle it then pulls water inside filling negative pressure. Well when you evacuate system it pulls freon in to fill negative pressure you created by evacuating system. Instead of trying to force freon in with positive pressure. Thus in turn gives you better fluid transfer and colder a/c.
[Edited 4/30/2015 11:10:54 PM ]
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| 5/1/2015 1:17:53 AM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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Gotcha thanks again
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| 5/1/2015 8:57:17 AM |
A/c compressor question |
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luckylouie42
Cedar Grove, WV
75, joined Mar. 2008
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well I am glad you finally understood something lol
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| 5/2/2015 6:37:53 AM |
A/c compressor question |
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reallove202331
Picayune, MS
36, joined Nov. 2014
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Im.a 15 year tech, crack the shrader valve loose put a towel over it, change the compressor when its done hissing, pull a 30 min vacume and charge, your done!
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| 5/2/2015 1:02:10 PM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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Awesome. ..I'll remember that 
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| 5/2/2015 7:01:45 PM |
A/c compressor question |
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marcus2962
Yucaipa, CA
26, joined Oct. 2012
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Yes it is critical to evacuate the ac system because it is illegal to let it vet into the atmosphere.
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| 5/4/2015 5:23:48 PM |
A/c compressor question |
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ninjazx9r
Largo, FL
48, joined Apr. 2010
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Im.a 15 year tech, crack the shrader valve loose put a towel over it, change the compressor when its done hissing, pull a 30 min vacume and charge, your done!
Most garages that work on a/c will reclaim freon with their machine and pay you for it or recharge system at a discount.
Thanks for dumping freon into our environment.
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| 5/5/2015 9:27:34 AM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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Actually R134a is classified by the EPA as none ozone depleting refrigerant that's why its available to the public at large. R12 the older version of freon is ozone depleting although both are classified under regulation 608 the R134a poses no danger to the environment but for blanket purposes it is classified as environmentally toxic.
And that's not true most shops charges you $50 to evacuate your freon.
[Edited 5/5/2015 9:29:19 AM ]
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| 5/5/2015 12:39:33 PM |
A/c compressor question |
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ninjazx9r
Largo, FL
48, joined Apr. 2010
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Well here in Fl. there lots of shops that will buy it. As far as safe for environment no freon is. That is why it is against the law to dump it freely into the environment. But do as you please you don't have to deal with the effects it has on the environment your kids will.
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| 5/5/2015 1:38:39 PM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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That may be so in Florida but they're talking about older freon version R12 and its nowhere close to R134a which non-toxic,non-ozone depleting and non-corrosive which is why they use it for aerosols we use today. Crying wolf about something you don't know doesn't help anybody.but do what you think will save your children there's no harm in that.
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| 5/5/2015 7:21:27 PM |
A/c compressor question |
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ninjazx9r
Largo, FL
48, joined Apr. 2010
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Crying wolf over something i don't know about?? Go fix your compressor and take big huff of your ozone safe freon. It's Harmless you will be fine.
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| 5/5/2015 9:17:15 PM |
A/c compressor question |
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up2youandme
Chandler, AZ
42, joined Jan. 2014
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Don't be upset its a common misconception. ...my compressor is done no need to expel anything.your kids are safe
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| 5/6/2015 9:24:12 AM |
A/c compressor question |
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reallove202331
Picayune, MS
36, joined Nov. 2014
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Don't be upset its a common misconception. ...my compressor is done no need to expel anything.your kids are safe
All the other stuff thats pumped into the air at shops everyday and he worries about a little 134a, i do BG fuel services at work everyday and that stuff pumps some nasty stuff out the exhaust but im sure thats safer lmao
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| 5/7/2015 10:27:01 PM |
A/c compressor question |
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ninjazx9r
Largo, FL
48, joined Apr. 2010
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World meet the Clueless. They are right above me. 
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