Posts Tagged ‘Converting from R12 to R134a Refrigerant’

Connecting a Serpentine Belt System to Factory Air in a 1970 Chevrolet C-10

Friday, January 11th, 2013

We’ve been working on classic cars for several decades now, so we’ve got a good picture of the quality of thousands of different parts made by scores of manufacturers. If we see that you’re working with equipment of dubious virtue, we’ll let you know, as this customer discovered.

I installed a serpentine belt system with an R4 compressor. What is the best way to hook it up to the factory A/C system? I would like to convert the POA to the cycling system and will need to make the necessary changes for the 134a switch.

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Removing EPR Valves when Converting Your Mopar to 134a

Monday, August 27th, 2012

This question from a 1970 Imperial owner brings up another issue common with Dodge, Plymouth, and Chrysler classic cars when converting those air conditioning systems from R12 Freon to R134a refrigerant. Here the owner is referring to our online guide to converting Mopar A/C systems to 134a.

You mention removing the EPR valve from the RV2 compressor when converting to R134a refrigerant. What is the reason for this? (more…)

Hi-Po A/C Engine Compartment Upgrade Kits for 1987 – 1993 Mustang Fox Body Classics

Tuesday, May 22nd, 2012

Classic Auto Air now offers a Hi-Po A/C engine compartment upgrade kit for 1987 to 1993 Mustang Fox Body classics.  This ultra high-performance engine compartment upgrade kit makes it easy for even a novice to upgrade and convert factory installed air-conditioning in a Mustang classic to the more modern 134a refrigerant with improved performance. (more…)

1965 Mustang AC: Converting From R12 to R134a Refrigerant

Wednesday, May 16th, 2012

Recently the owner of a ’65 Mustang asked us how to convert his car’s original compressor to use R134a refrigerant (also known as 134a). Production of R12 Freon was discontinued in 1995 due to concerns about R12′s damaging effects on the ozone layer. The more environmentally friendly R134a has been used in most models since then. Assuming the compressor is in good shape, the owner of this 1965 Mustang can convert from R12 to R134a. Here are the steps to take to make sure the converted AC system gets nice and cold. (more…)

R-12 or 134a: Know the Refrigerant Contents of Your Classic Car’s AC System

Monday, March 12th, 2012

We sometimes receive questions from owners wondering what type of refrigerant is in their air conditioning system.  Cars manufactured prior to 1995 originally came with R-12 Freon, a refrigerant that was discontinued due potential ozone damage.  Cars manufactured after 95, and older systems requiring re-charging contain a more ozone friendly refrigerant known as 134a.  Questions about system refrigerants arise when it isn’t clear if the ac system has ever been recharged.  The following customer e-mail is case in point: (more…)

Converting Classic Ford, GM, and MOPAR’s from R12 to R134a Refrigerant

Tuesday, November 1st, 2011

Most cars with air conditioning manufactured prior to 1995 used R12 Freon refrigerant, which is believed to damage the ozone layer.  Due to environmental concerns R12 is no longer widely commercially available, having been replaced by R134a.  An ozone friendly alternative, R134a is an efficient absorber and carrier of heat, and contrary to popular belief, most cars originally equipped with R12 can be converted to 134a and still keep you just as cool. (more…)

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