134a question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

phlegm · 05-29-2006, 10:07 PM

Does the refigerant come with oil already in it?? Since my conversion I have blown a clutch and when we put a new clutch on the A6 the compressor started Locking up.... should I add oil and refirgerant or go ahead and replace the 30x yr old compressor?

**truckdude239** · 05-29-2006, 10:26 PM

go ahead and replace the compressor put new oil and refirgerant dont forget to repalce the dryer reciver with you change the compressor

*rage'nrat638* · 05-29-2006, 10:50 PM

you always need oil in the system
some 134 you can buy with the oil added to it, you will need to find a chart to know how much to add

may the forch be with you

70c10 · 05-29-2006, 10:57 PM

I thought it had 1 ounce in it but I might be wrong. I have about 50 cans on hand, I can check tomorrow.

JimKshortstep4x4 · 05-30-2006, 05:54 AM

According to the manual, oil is added to the system as follows:

Repaired compressor......7 fl oz
Replaced evaporator......3 fl oz
Replaced condenser.......1 fl oz
Replaced rec/drier..........1 fl oz

Jim

phlegm · 05-30-2006, 10:17 AM

Thanks Jim,

So if I replace the Drier, and compressor, then I need to add 8fl oz of oil to the system along with the Coolant?

Also about how much 134, From what I have seen on my searches this varies.

phlegm · 05-30-2006, 10:20 AM

BTW, for the record, I had someone do my 134 conversion, thinking that I did not want to release the freon. They were the ones that I think left the oil out, awfully conspicuous that the compressor would startlocking up after the conversion.

O well, there is 300.00 (after everything is fixed) I will never get back. Funny part is I was over there a few months ago and saw him doing another conversion, he just blead it off with no vaccume just Like I would have.....

Any job worth doing... Anyone in the Mebane NC area that is looking to get something like this done PM Me so I can warn you.

JimKshortstep4x4 · 05-30-2006, 08:31 PM

The amount of R-12 recommended for the system is 3 lbs 4 fl oz for trucks, (Burbs with the rear AC is more). 80 percent of the R-12 capacity seems to be a good starting point (approx. 2 lbs 10 fl oz) but we have had to add a little sometimes.

I would be curious about what others have experienced.

Jim

stope4 · 06-01-2006, 09:56 PM

10 - 11 oz of oil is about right. Put half in new rebuilt compressor suction side and half in dryer. Freon put about 2 16 oz cans in with system running. Place thermometer in passenger side vent, turn ac to full blast, close all doors. Start adding a little more freon at a time checking the thermometer with rpms at about 1500. Continue repeating these steps recording the temperature each time. Keep adding a little freon at a time until thermometer starts reading a higher temperature than the previous reading. Then release a little freon until you start getting the lower temperature. This is the amount you want. Too much freon or oil will cause your system to blow less cold.

05-29-2006, 10:07 PM	#1
phlegm Still Green but learning Join Date: Nov 2004 Location: Central NC Posts: 1,895	134a question Does the refigerant come with oil already in it?? Since my conversion I have blown a clutch and when we put a new clutch on the A6 the compressor started Locking up.... should I add oil and refirgerant or go ahead and replace the 30x yr old compressor? __________________ -- Cory 71 Cheyenne 10 - SWB, 350, "3 on the tree" AC cab 07 Suburban LTZ 4x4 2010 Acura TL 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY....nope never was

05-29-2006, 10:26 PM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: 134a question go ahead and replace the compressor put new oil and refirgerant dont forget to repalce the dryer reciver with you change the compressor __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

05-29-2006, 10:50 PM	#3
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: 134a question you always need oil in the system some 134 you can buy with the oil added to it, you will need to find a chart to know how much to add may the forch be with you

05-29-2006, 10:57 PM	#4
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Re: 134a question I thought it had 1 ounce in it but I might be wrong. I have about 50 cans on hand, I can check tomorrow. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

05-30-2006, 05:54 AM	#5
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: 134a question According to the manual, oil is added to the system as follows: Repaired compressor......7 fl oz Replaced evaporator......3 fl oz Replaced condenser.......1 fl oz Replaced rec/drier..........1 fl oz Jim

05-30-2006, 10:17 AM	#6
phlegm Still Green but learning Join Date: Nov 2004 Location: Central NC Posts: 1,895	Re: 134a question Thanks Jim, So if I replace the Drier, and compressor, then I need to add 8fl oz of oil to the system along with the Coolant? Also about how much 134, From what I have seen on my searches this varies. __________________ -- Cory 71 Cheyenne 10 - SWB, 350, "3 on the tree" AC cab 07 Suburban LTZ 4x4 2010 Acura TL 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY....nope never was

05-30-2006, 10:20 AM	#7
phlegm Still Green but learning Join Date: Nov 2004 Location: Central NC Posts: 1,895	Re: 134a question BTW, for the record, I had someone do my 134 conversion, thinking that I did not want to release the freon. They were the ones that I think left the oil out, awfully conspicuous that the compressor would startlocking up after the conversion. O well, there is 300.00 (after everything is fixed) I will never get back. Funny part is I was over there a few months ago and saw him doing another conversion, he just blead it off with no vaccume just Like I would have..... Any job worth doing... Anyone in the Mebane NC area that is looking to get something like this done PM Me so I can warn you. __________________ -- Cory 71 Cheyenne 10 - SWB, 350, "3 on the tree" AC cab 07 Suburban LTZ 4x4 2010 Acura TL 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY....nope never was Last edited by phlegm; 05-30-2006 at 10:21 AM.

05-30-2006, 08:31 PM	#8
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: 134a question The amount of R-12 recommended for the system is 3 lbs 4 fl oz for trucks, (Burbs with the rear AC is more). 80 percent of the R-12 capacity seems to be a good starting point (approx. 2 lbs 10 fl oz) but we have had to add a little sometimes. I would be curious about what others have experienced. Jim

06-01-2006, 09:56 PM	#9
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Re: 134a question 10 - 11 oz of oil is about right. Put half in new rebuilt compressor suction side and half in dryer. Freon put about 2 16 oz cans in with system running. Place thermometer in passenger side vent, turn ac to full blast, close all doors. Start adding a little more freon at a time checking the thermometer with rpms at about 1500. Continue repeating these steps recording the temperature each time. Keep adding a little freon at a time until thermometer starts reading a higher temperature than the previous reading. Then release a little freon until you start getting the lower temperature. This is the amount you want. Too much freon or oil will cause your system to blow less cold. Last edited by stope4; 06-01-2006 at 09:56 PM.



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