A/C recharge oil and freon? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Luis_gz06 · 04-02-2008, 01:14 AM

How many ounce of oil do these trucks w/factory air get? Also, how many lbs of freon. Im putting the R134a freon on it. Thanks!

ed2552 · 04-02-2008, 01:18 AM

Don't call it freon, R112 was freon, call it refridgerant, i got b'd at at a parts store for calling it freon, idk why

roughedup72 · 04-02-2008, 03:33 AM

I just did this last summer and cant for the life of me remember how much it was. I think it was 80% of what the system holds for r12. As far as oil I dont remember. someone will chime in and give you the answer. Good luck.

**clay68c10** · 04-02-2008, 05:06 AM

The factory assy manual gives the specs for oil and r-12, roughedup72 is right about the 80% thing.
The assy manual shows 3.25lb r-12 and 10oz of oil. So that calculates out to 2.6lb of 134. The manual says something about the compressor being shipped with some oil in it, so you may want to add a couple of ounces if your system is all cleaned out.

kenm78 · 04-02-2008, 07:38 AM

Pag oil, or ester for it R134 and Mineral oil for R12.

Luis_gz06 · 04-02-2008, 10:06 AM

Thanks everyone!

stope4 · 04-02-2008, 05:41 PM

Can't you use the PEG oil and ester with the R12? I thought the only issue was using mineral oil with the R 134a

kenm78 · 04-03-2008, 10:52 PM

You can use ester in R12 but I have heard you are not suppose to use Pag with R12. And I have nevery used Pag with R12.

Willys47 · 04-03-2008, 11:54 PM

POLYOLESTER (POE) OIL

Definition: A type of compressor oil that is compatible with both R-134a and R-12 refrigerants, as well as residual mineral oil that may still be in the A/C system. POE oil is often used when retrofitting an older R-12 A/C system to R-134a.
Switching an older R-12 system to R-134a does not require a lot of modifications in most instances. Changing the accumulator or receiver-dryer, removing the old compressor oil and replacing the high pressure switch is generally all that is needed. For more information, consider purchasing the R134A RETROFIT GUIDE on this website http://www.aa1car.com/carleyware/retrofit.htm

04-02-2008, 01:14 AM	#1
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	A/C recharge oil and freon? How many ounce of oil do these trucks w/factory air get? Also, how many lbs of freon. Im putting the R134a freon on it. Thanks! __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

04-02-2008, 01:18 AM	#2
ed2552 Registered User Join Date: Jan 2007 Location: Charles City IA Posts: 1,626	Re: A/C recharge oil and freon? Don't call it freon, R112 was freon, call it refridgerant, i got b'd at at a parts store for calling it freon, idk why __________________ '67 C20, Under the Knife!, LWB, Eaton HO-52, Rear Coil Springs 72' GMC C2500, 350, TH400(?), Dana 60 '67 K10 4-spd., 305, SM465, Dana 44, 12 Bolt, RUST! '65 C60 292, 4 spd, 2 spd Rearend, 15' Grain Box, MINT! 09 Yukon Denali 82k Miles 6.2L/6A

04-02-2008, 03:33 AM	#3
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: A/C recharge oil and freon? I just did this last summer and cant for the life of me remember how much it was. I think it was 80% of what the system holds for r12. As far as oil I dont remember. someone will chime in and give you the answer. Good luck. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

04-02-2008, 05:06 AM	#4
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,990	Re: A/C recharge oil and freon? The factory assy manual gives the specs for oil and r-12, roughedup72 is right about the 80% thing. The assy manual shows 3.25lb r-12 and 10oz of oil. So that calculates out to 2.6lb of 134. The manual says something about the compressor being shipped with some oil in it, so you may want to add a couple of ounces if your system is all cleaned out. __________________ ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ

04-02-2008, 07:38 AM	#5
kenm78 Broken Down Join Date: Dec 2006 Location: Choctaw, Oklahoma Posts: 1,267	Re: A/C recharge oil and freon? Pag oil, or ester for it R134 and Mineral oil for R12. __________________ kenm78 1982 Chevy 4X4 Project truck “It’s better to keep your mouth shut and let people wonder about your ignorance, than open your mouth and reveal all doubt”

04-02-2008, 10:06 AM	#6
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	Re: A/C recharge oil and freon? Thanks everyone! __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

04-02-2008, 05:41 PM	#7
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Re: A/C recharge oil and freon? Can't you use the PEG oil and ester with the R12? I thought the only issue was using mineral oil with the R 134a

04-03-2008, 10:52 PM	#8
kenm78 Broken Down Join Date: Dec 2006 Location: Choctaw, Oklahoma Posts: 1,267	Re: A/C recharge oil and freon? You can use ester in R12 but I have heard you are not suppose to use Pag with R12. And I have nevery used Pag with R12. __________________ kenm78 1982 Chevy 4X4 Project truck “It’s better to keep your mouth shut and let people wonder about your ignorance, than open your mouth and reveal all doubt”

04-03-2008, 11:54 PM	#9
Willys47 Registered User Join Date: Dec 2007 Location: Nanaimo B.C. Posts: 604	Re: A/C recharge oil and freon? POLYOLESTER (POE) OIL Definition: A type of compressor oil that is compatible with both R-134a and R-12 refrigerants, as well as residual mineral oil that may still be in the A/C system. POE oil is often used when retrofitting an older R-12 A/C system to R-134a. Switching an older R-12 system to R-134a does not require a lot of modifications in most instances. Changing the accumulator or receiver-dryer, removing the old compressor oil and replacing the high pressure switch is generally all that is needed. For more information, consider purchasing the R134A RETROFIT GUIDE on this website http://www.aa1car.com/carleyware/retrofit.htm __________________ I was hooked on these trucks since 1982 when I drove my budys fathers 1968 Custum GMC 396 automatic dana 60 rear with a power lock diff what a ride more fun then we will we can ever tell!! Last edited by Willys47; 04-04-2008 at 12:18 AM.

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