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07-13-2017, 03:34 PM
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#1 |
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20' Daredevil (Ret)
 
Join Date: May 2003
Location: Jefferson State
Posts: 13,728
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Freon Capacity?
Searching has turned up nothing so far but I'll keep looking. In the meantime, does anyone know the original factory A/C system capacity for my '72 K20 with 350 engine?
I thought there was a sticker under the hood but now I can't find it. Thanks! 
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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07-13-2017, 04:05 PM
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#2 |
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Senior Member
Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,852
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Re: Freon Capacity?
Most I've seen had 3.75# on the sticker on the compressor. However, my 69 originally had a sticker over the 3.75# that said 3.25# R-12.
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07-13-2017, 04:13 PM
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#3 |
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Moderator
 
Join Date: May 2007
Location: Southern Cal
Posts: 20,036
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Re: Freon Capacity?
3.75 lbs of freon, 10 ozs of oil.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul |
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07-13-2017, 04:43 PM
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#4 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,728
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Re: Freon Capacity?
Thank you, gentlemen!
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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07-13-2017, 08:05 PM
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#5 |
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Registered User
Join Date: Aug 2016
Location: Idaho Falls, ID
Posts: 233
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Re: Freon Capacity?
10 oz of oil in the low side port?
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07-13-2017, 08:06 PM
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#6 |
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Registered User
Join Date: Aug 2016
Location: Idaho Falls, ID
Posts: 233
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Re: Freon Capacity?
Also, I have the original a6 compressor, does it cycle or run all the time?
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07-13-2017, 08:35 PM
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#7 |
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Senior Member
Join Date: May 2012
Location: Scottsdale, AZ
Posts: 1,907
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Re: Freon Capacity?
There is a procedure in the manual for compressor oil called "Checking the compressor oil". You can do that if you are swapping out to determine how much oil. Refrigerant capacity is not the same for r134 either. I just put in 7oz the a6 came with 3oz. I didn't hassle with the procedure in the manual. I probably have too much oil. But the manual lays it out pretty good.
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