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07-01-2015, 06:46 PM
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#1 |
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Registered User
Join Date: Jun 2015
Location: OUT IN THE SHOP
Posts: 58
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Upgrading 67-72 trucks AC systems to 134a
Is there a place on this forum that directs a person to the DO's and Don'ts on upgrading AC systems on 1967 to 1972 c10 trucks ? I see several posts, but nothing that outlines the right way to do such upgrades without spending thousands of dollars... I read on here several transmission rebuilding ideas and saving money by folks wanting to rebuild there own transmission but nothing on AC systems....
items like : A6 compressor vs Sanden Compressor Stock condenser vs after market condensers (Why add a electric fan?) Use the stock POA valve, how to calibrate it for 134a ? Show the Steps on exactly how to do this upgrade on a stock POA valve. how do I get to 25 PSI... Expansion Valve....low pressure does not change based on engine RPM ? How do I test a Expansion valve....should I put it in the freezer ? I could go on and on but I do not want to create this monster if one already exists.... |
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07-01-2015, 08:25 PM
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#2 |
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Senior Member
 Join Date: Mar 2003
Location: Colfax-California
Posts: 8,496
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Re: Upgrading 67-72 trucks AC systems to 134a
bumped it to the front page for you, this will get you started. I'm working through mine right now and will post a tutorial when I'm done
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08-19-2015, 11:07 PM
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#3 |
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Registered User
Join Date: Jun 2015
Location: OUT IN THE SHOP
Posts: 58
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Re: Upgrading 67-72 trucks AC systems to 134a
Not sure exactly what is going on here with this....moved on to other sources to address my concerns. Thanks.
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08-20-2015, 01:59 AM
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#4 |
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Registered User
Join Date: Jul 2015
Location: Euless, Tx
Posts: 431
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Re: Upgrading 67-72 trucks AC systems to 134a
Surprised nobody chimed in on this.
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08-21-2015, 12:52 AM
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#5 |
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Registered User
Join Date: Oct 2008
Location: los angeles, ca
Posts: 926
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Re: Upgrading 67-72 trucks AC systems to 134a
trying to figure out what to do with my system ...
http://67-72chevytrucks.com/vboard/s...d.php?t=670762 |
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08-21-2015, 02:05 PM
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#6 | |
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Registered User
Join Date: Jul 2015
Location: Euless, Tx
Posts: 431
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Re: Upgrading 67-72 trucks AC systems to 134a
Quote:
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08-21-2015, 01:51 AM
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#7 |
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Moderator
 
Join Date: May 2007
Location: Southern Cal
Posts: 19,996
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Re: Upgrading 67-72 trucks AC systems to 134a
__________________
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 |
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08-21-2015, 02:10 AM
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#8 |
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Registered User
Join Date: Mar 2014
Location: Corvallis, OR
Posts: 712
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Re: Upgrading 67-72 trucks AC systems to 134a
In case this hasn't been mentioned, the most crucial part is to flush the system. The older lubricating oil is not compatible with the new oil required for R134a. That means flushing the evaporator, condenser, and lines.
__________________
1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205 1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears 1996 Chevy Suburban K1500 350/4L60E |
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