1972 A/C A6 to R4 conversion advise - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Lee H · 09-25-2011, 02:19 PM

I'm almost done with my serpentine conversion. Last item is dealing with the compressor change. Old compressor A6 retrofitted to 134 is cooling great but must go. The serpentine system comes with a R4 compressor. I'm looking for some advise from those in the know or have done this. What do I need to do/buy/adapt to make this work? Can any competent A/C shop do this conversion?

**leddzepp** · 09-25-2011, 02:29 PM

You will need new hoses. A shop should be able to make up a set for you, if this is something you would like to do yourself....or a good A/C shop (NOT Pep Boys

) can do the whole deal (new hoses, install, charge the system) for you. I have done a lot of A/C work on my trucks, but not using an R-4 compressor, only used the factory A-6 and the newer replacement Pro6ten from Old Air.

09-25-2011, 02:19 PM	#1
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,147	1972 A/C A6 to R4 conversion advise I'm almost done with my serpentine conversion. Last item is dealing with the compressor change. Old compressor A6 retrofitted to 134 is cooling great but must go. The serpentine system comes with a R4 compressor. I'm looking for some advise from those in the know or have done this. What do I need to do/buy/adapt to make this work? Can any competent A/C shop do this conversion? __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703

09-25-2011, 02:29 PM	#2
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,019	Re: 1972 A/C A6 to R4 conversion advise You will need new hoses. A shop should be able to make up a set for you, if this is something you would like to do yourself....or a good A/C shop (NOT Pep Boys ) can do the whole deal (new hoses, install, charge the system) for you. I have done a lot of A/C work on my trucks, but not using an R-4 compressor, only used the factory A-6 and the newer replacement Pro6ten from Old Air. __________________ 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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