Adding oil to A/C - Pirate4x4.Com : 4x4 and Off-Road Forum

BumperJumper · 08-22-2004, 05:28 PM

Fairly soon I'm going to get the stuff I need to service my A/C, and replace the receiver/drier in the process. The manual says to add a small amount of oil when replacing it, but how exactly do I add the oil? Do I just pour it in to the high (or low) pressure line while the system is open, or what?

DavidW · 08-23-2004, 07:29 AM

I have always poured ester oil into the compressor with the compressor out of the vehicle and let it sit for a few hours to work its way in. This could be completely wrong so you might want to get more info, but it has worked in the past.

tornadoalleycruiser · 08-23-2004, 07:50 AM

If the system is open you can pour oil directly into the compressor, if it's closed you can get pressurized oil charges that work very well.

cruiserbrett · 08-23-2004, 08:48 AM

You can normally just pour it in if the system is open, but make sure you use the right type of oil. Ester oil is for r134a IIRC, mineral oil for r12.

Berg · 08-23-2004, 09:10 AM

How do you know how much to put in?
especially in a old r-12 system that is not oem..

yoda · 08-23-2004, 09:15 AM

You would normally add 2-3 ounces of oil to the drier. If other pieces of the system have been drained of oil, add that amount also.

I am assuming this is normal maint and not a repair?

What type of compressor does it have?

haystax · 08-23-2004, 09:49 AM

Quote:

Originally Posted by Berg

How do you know how much to put in?
especially in a old r-12 system that is not oem..

What type of compressor? How big is the drier?

Halogrinder · 08-23-2004, 08:41 PM

under vaccum is the easiest way to do it. vacuum the system down, and let the machine suck it in...lol or if your cheap, and your using manifold guages, just take the yellow suction line you would hook up the can of refridgerant, and dip it in yer oil, open up the low side, and viola, its sucked into the system WITH A VACUUM STILL THERE....if not, when you vaccum it down, some of the oil comes out again

BumperJumper · 08-25-2004, 06:43 PM

Quote:

Originally Posted by yoda

You would normally add 2-3 ounces of oil to the drier. If other pieces of the system have been drained of oil, add that amount also.

I am assuming this is normal maint and not a repair?

What type of compressor does it have?

Just normal maintenence, stock R12 system in an '88 FJ62.

yoda · 08-25-2004, 09:23 PM

Quote:

Originally Posted by BumperJumper

Just normal maintenence, stock R12 system in an '88 FJ62.

Normal maint, just add 2-3 oz to the new drier, suck er down, and recharge

(Thats mineral oil, and evacuate the system, and recharge)

08-22-2004, 05:28 PM	#1 (permalink)
BumperJumper Registered User Join Date: May 2003 Member # 19465 Location: Fairchild Air Force Base, WA Posts: 777	Adding oil to A/C Fairly soon I'm going to get the stuff I need to service my A/C, and replace the receiver/drier in the process. The manual says to add a small amount of oil when replacing it, but how exactly do I add the oil? Do I just pour it in to the high (or low) pressure line while the system is open, or what? __________________ Fully desmogged '88 FJ62 w/ 222K miles; Flowmaster exhaust, Mallory ignition, Tuffy center console, '88 Mazda MX6 front seats, fully Dynamat'd, four wheel discs USAF Active Duty, proudly serving

08-23-2004, 07:29 AM	#2 (permalink)
DavidW Registered User Join Date: Aug 2002 Member # 13391 Location: Iowa Park, Texas Posts: 1,086	I have always poured ester oil into the compressor with the compressor out of the vehicle and let it sit for a few hours to work its way in. This could be completely wrong so you might want to get more info, but it has worked in the past. __________________ White Trash of the Elwood Chapter - WFFD - TORC4x4.org - www.marksoffroad.net

08-23-2004, 08:48 AM	#4 (permalink)
cruiserbrett Registered User Join Date: Sep 2001 Member # 6863 Location: San Diego Posts: 2,797	You can normally just pour it in if the system is open, but make sure you use the right type of oil. Ester oil is for r134a IIRC, mineral oil for r12. __________________ I have enough projects for the next decade. Need two?

08-23-2004, 09:10 AM	#5 (permalink)
Berg Registered User Join Date: Jun 2000 Member # 1176 Location: Utah Posts: 2,474	How do you know how much to put in? especially in a old r-12 system that is not oem.. __________________ June 28th 2003

08-23-2004, 09:15 AM	#6 (permalink)
yoda Registered User Join Date: May 2001 Member # 4828 Location: North Bend, WA Posts: 659	You would normally add 2-3 ounces of oil to the drier. If other pieces of the system have been drained of oil, add that amount also. I am assuming this is normal maint and not a repair? What type of compressor does it have? __________________ David TLCA 14788 71 FJ-40 TBI 327 w/TH-350 76 FJ-40 "project"

08-23-2004, 07:50 AM	#3 (permalink)
tornadoalleycruiser Registered User Join Date: Jun 2002 Member # 12451 Location: Kansas City, Mo Posts: 1,245	If the system is open you can pour oil directly into the compressor, if it's closed you can get pressurized oil charges that work very well.

08-23-2004, 08:41 PM	#8 (permalink)
Halogrinder Moderhater Join Date: Feb 2003 Member # 16980 Location: h-town Posts: 11,341	under vaccum is the easiest way to do it. vacuum the system down, and let the machine suck it in...lol or if your cheap, and your using manifold guages, just take the yellow suction line you would hook up the can of refridgerant, and dip it in yer oil, open up the low side, and viola, its sucked into the system WITH A VACUUM STILL THERE....if not, when you vaccum it down, some of the oil comes out again __________________ Im your BMW huckleberry https://www.facebook.com/BMWdoctor can you do me a favor and like/share my page? If you like/share, you get free washes/discounts/other neat stuff for you car! gun facts that will blow your mind: http://www.gunfacts.info/pdfs/gun-fa...6_1_screen.pdf

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode