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1930's to 1980's Cars & Trucks
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Upgrading your vehicle’s cooling system from the old R12 refrigerant can present a host of challenges. Here’s an issue we’re often asked about by Mopar owners.
I have converted my 68 Charger to R134a using a rotary compressor. Sometimes my system stops cooling and I lose air flow from the vents. What is causing this and how can I fix it?
Here’s a very common problem our customers have when converting their classic cars from the old R12 refrigerant to the newer R134a refrigerant.
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…)
We recently received this email inquiry that touches on a problem frequently encountered by classic car owners when upgrading their air conditioning systems from R12 to R134a refrigerant. (more…)
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…)
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…)
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…)
We recently received an e-mail from the proud owner of a 1963 Cadillac, with installed, under dash air conditioning manufactured by Classic Auto Air. The compressor is disconnected, and the owner is curious about how much R134a is needed to re-charge the system. 
Instruction manuals are included with each Classic Auto Air system shipped, but we get this question frequently enough so we are answering it here in our Tech Talk section. (more…)
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