My mechanic says I need to replace my AC filter drier. Do you agree?

August 22nd, 2014

Question: My mechanic told me my compressor is locked up and it needs to be replaced on my 1965 Mustang.  He also told me I need to replace the filter-drier and flush the system at the same time in order for him to warranty his work. Why must I change my drier if all I need is a compressor?

Answer: Think of the filter-drier like you do the oil-filter for your engine; anytime you do an oil change you also change the filter.  The same rule applies for any air-conditioning system.

Let’s back up a moment and explain the functions of a filter drier. Read the rest of this entry »


8-Steps – Charging A Fixed Displacement Compressor with 134a

August 16th, 2014

Commercial installers of our kits as well as professional, licensed air conditioning repair facilities have asked, so we have developed a procedure and an eight-point checklist to be followed for charging a FIXED-DISPLACEMENT COMPRESSOR (Sanden style) system with 134a REFRIGERANT from a CHARGING STATION.  (Note: procedures are different if you are HAND CHARGING with individual refrigerant canisters or if you are NOT using 134a refrigerant). Read the rest of this entry »


Why does my A6 compressor keep leaking & slinging oil?

August 6th, 2014

We get a lot of questions regarding General Motors’ A6 “long-style” air conditioning compressor and leaks.  We are focusing on the A6 because it is notorious for leaking, but our advice here applies to any vintage air conditioning compressor system.  We last wrote about the issue of A6 compressors leaking oil from the shaft back in 2011 so it is probably time to revisit the issue.

A customer recently described his specific situation like this: “Over the last 5 years, I’ve replaced three rebuilt long style compressors on my 69 Chevelle.  I only drive my Chevelle a couple hundred miles a year, and it seems that every time I drive it, the compressor pulley ends up slinging oil under the hood and leaking refrigerant at the shaft seal.  I finally decided “to heck with it,” and replaced it with a new one, only to find the same problem.  Why can’t I find a decent A6 compressor, either new or rebuilt?” Read the rest of this entry »


Chevy G-Body OEM Air Conditioning – A Failure Corrected

July 15th, 2014

The factory R4 compressor that was originally used in the 1978 through 1988 Chevrolet model years (affectionately referred to as G-Body cars) has proven to be notoriously unreliable and is frequently cited by mechanics and seen by CAA technicians first hand as a common cause of A/C component failure in GM G Bodies. Upgrading to Classic Auto Air’s direct fit rotary compressor will solve this likely reason your A/C is inoperable. The direct fit rotary compressor will also reduce horsepower draw, and allow for operation at up to 6,000 RPM. Even if your current compressor is still holding on, the OEM condenser design and R12 refrigerant are significantly out-of-date; upgrading to Classic Auto Air’s high performance direct fit condenser not only makes converting to 134a easy, but drastically improves your overall system performance. Read the rest of this entry »


Do I Need To Add Oil To My Air Conditioning Compressor?

July 15th, 2014

Customers often ask whether or not they need to add oil to an air conditioning compressor they purchase from us. This question comes up because people want to avoid poor cooling or failure problems resulting from improper oil levels. Fortunately most people realize the harm to the system and potential danger of running an AC compressor with no oil. Read the rest of this entry »


AC Installation Tips – Loose Fit FIRST!

July 15th, 2014

From our mailbag – here’s a recent email from Ray:

I just installed my new rotary compressor using the York to Sanden compressor & u-shaped idler adapter brackets you supply in your kit. I attached the adapter bracket to the mount and tightened the compressor to the adapter bracket, then tried to install the u-shaped idler adapter bracket. I could not seem to line up the mount holes on the stock idler bracket to the new compressor. What am I doing wrong or do I have the wrong adapter mount?

Ray Read the rest of this entry »


Chevy Corvette Perfect Fit Air Conditioning System Updated April 2014

April 28th, 2014

Corvette model years affected: 1968, 1969, 1970, 1971, 1972, 1973, 1974,

Your wish is our command!  With the success of all of our D.E.R. (Direct Electric Replacement ) controls, we have received loads of requests to upgrade the electronics of our vintage Corvette air conditioning systems to ELITE (electronic controlled) status.  So, we did just that.  We upgraded our Perfect Fit 1968-1974 Chevy Corvette system to use the enormously popular, exclusive D.E.R. fully electronic controls.  You get all the cooling and heating ability that Classic Auto Air is known for, with the added benefit of simplified wiring using our EZ  Wire system and Plug and Play simplicity with our all new D.E.R. Control head. Read the rest of this entry »


Turn Of The Screw – Adjusting Tecumseh Or York Compressor Service Valves On Your Car’s AC

April 20th, 2014

Working with vintage air conditioning systems is a labor of love for us and we like to share tips and tricks-of-the-trade for maintaining these old systems.

A recent customer of ours purchased a compressor and installed it on his 70 Ford Maverick and brought the car to his a/c mechanic to have the compressor charged with refrigerant.  Shortly after, he called us in a panic when the pressure relief valve on the Maverick’s compressor opened during the charging of the air-conditioning system, spraying oil & refrigerant throughout the car’s engine compartment. Read the rest of this entry »


Two Icons Meet Again in New York City

April 8th, 2014

mustang-empire_state__64Later in the month of April, I’m heading to New York City to see two icons brought together who haven’t met in decades. No, I’m not talking about seeing Rocky meet up with Apollo Creed on Broadway! (Although I may take in that show also.) I’m heading to NYC to see the brand new Ford Mustang at the top of the Empire State Building. And this 2015 Mustang will be brought up the same way it was in 1965 – piece by piece in an elevator.

What – you don’t know this story? Read the rest of this entry »


Replacement Aftermarket A/C Defrost Duct for Chevelle Years 1970, 1971, 1972

March 26th, 2014

Chevelle Aftermarket Replacement AC Defrost DuctWalls Are Twice as Thick as Original GM Part# 3963756

Question: What do you get when you mix thin gauge plastic with radical temperature shifts from hot to cold and back again? Answer: Warping and cracking!

In the auto restoration industry, there has been a history of scrapping OEM air conditioning ductwork in vintage ’70-’72 Chevelle, Monte Carlo and El Camino models because the duct had snapped off flimsy mounts, or developed cracks. So our engineers decided to develop our own replacement duct and while we were at it, figured we could address the hot/cold warping issue head-on. Read the rest of this entry »


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