When I purchased my '63 Cadillac 11 months ago, it had ice cold a/c with an R12 system.  The seller advised me that it needed to be "topped off" every year or so.  For the small amount of driving that I did with it in the summer months (when it wasn't tied up in the shop for other repairs), I did notice the temps from the vents getting gradually warmer.  I also noted that while traveling at highway speeds, even when things were working properly, the air would become much warmer until I slowed back down to city driving speeds.  I attributed that to a vacuum related issue, and wasn't too concerned about it for the amount of highway driving that I do.

By the end of summer, I was getting outside air temperature inside the car, even though the compressor clutch was engaged.  Now that temps are warming up again, I took it to my mechanic, who had recently purchased a small stock of R12.  He topped it off, and when I headed home and noticed no difference, I used an infra-red thermometer to measure the temps of the air coming out of the vents, and found them to be the same as the ambient temps outside, about 67 - 72 degrees.  I called him last week to ask if he had done either a dye or sniff test, and that's when he told me that he didn't have the  proper recovery equipment, and only added a can or two to whatever remained in the system. While I was examining the system at home this week before calling him, I noted that there is no activity in the sight glass of the dehydrator receiver, even though the compressor clutch is cycling properly whenever I engage the a/c. I have an appointment for next Wednesday to see what the next step is.  His suggestion over the phone is that "maybe the compressor is bad."

Over the past couple of days, I have called a number of auto a/c shops in the area, and no one does R12 anymore.  The one guy who still has the equipment to do it can't find product anywhere.  My question to you guys is if it is time to bite the bullet and make the switch to R134a?  I would like to keep my 34,000 mile car in as original condition as possible, but the time is probably near when R12 will no longer be available anywhere, so I'm concerned about funneling money into maintaining this system only for its originality. 

I did read the great articles on this site in the "help" column related to this subject, but since it was posted back in 2016-2017, I'm sure a lot has changed since then.  I appreciate any updated thoughts on this, and my apologies for being so long winded.

Terry  

Views: 71

Reply to This

Replies to This Discussion

Terry 

Contact ——Old Air products - they will tell you what you will need to go to 134 a in our year  Cadillac AC systems 
 
Enjoy 

Thanks Tony.  Every AC shop in my area that I've spoken to has offered to do a conversion to 134a, so that isn't a problem.  I'm still sitting on the fence, as I have read that 134a is being phased out and replaced with a new refrigerant, so I don't want to have to go through the process twice over the next few years.

I did look at Old Air Products website after reading your reply yesterday, and was a little disappointed in how it was laid out.  Once you enter the year, make and model of your vehicle, you are linked to a page with dozens of individual AC parts that are available for that car, but no "package" consisting of the parts that would be needed to do the conversion. I guess a phone call to them would solve that issue, but it just seems to be one more step that could have been avoided.

I spoke with a CLC member at a regional meet yesterday who told me he uses a refrigerant in his '60 Cadillac that is not R12, and doesn't require any type of modification to the AC system, so I will be getting some more information on that from him this week. 

Let us know what you find out about a new refrigerant to be using 

R-12 is now illegal to use and very hard to be finding if at all but I would use it if you can find it 

Calling Old AC products is the way to go when and if needed for the 134a 

Enjoy 

 Correction that is — Old Air Products to be calling 

Enjoy 

I could be wrong Tony, but my understanding is that R12 is not illegal to use, but you have to have a license to purchase it (if you can find it), and must have the proper recovery equipment to prevent it from being released into the atmosphere when you are discharging/recharging the AC system.  And of course it can no longer be manufactured. But the day will come when the dwindling supply of NOS and recaptured R12 will run out, and the price of it will be crazier than it is now as we approach that point..

RSS

Photos

  • Add Photos
  • View All

Forum

1964 turbo trans

Started by JOHN V SCHILLACI in General Discussion 12 minutes ago. 0 Replies

Hello, Does anyone know if the spacer between the engine and turbo trans year specific? If not what years fit which.Continue

differential seal

Started by Al zink in 1963/64 Cadillac Specific Discussion. Last reply by Jason Edge 1 hour ago. 1 Reply

Can anyone provide me with a good source for a differential seal for my 63 cadillacThanksContinue

Tires

Started by Mark Bartlett in 1963/64 Cadillac Specific Discussion. Last reply by Mark Bartlett 6 hours ago. 26 Replies

Hi I am new to this Discussion  I currently purchasing a 64 Deville convertible and It has bias ply tires that are 15 year old  they have L-78-15 tires and would like to put on radials . Question …Continue

The amazing Th-400 trans still going strong in 2023 in drag racing circles

Started by Tony and Ginny 429 in 1963/64 Cadillac Specific Discussion 8 hours ago. 0 Replies

I just read an article about a drag race engine producing 2500 plus  HP using a TH-400 trans behind it Sure the trans was modified some to handle that kind of power but was still a big ( good )…Continue

Tags: trans, TH-400, The

Blog Posts

Lower Front End Ball Joints

Posted by Logan Robb on May 11, 2023 at 9:04am 7 Comments

Good Morning all! 



I took the 64 into the shop to have some adjustments completed and in the process decided to have the lower ball joints replaced as was recommended the last time I had it in. I ordered the parts and came into the shop. They quoted me nearly $500 to replace those lower ball joints requiring nearly 4hrs of labor. Now this is a reputable shop and they know me by name here and they will continue to get my business. I am just questioning what on earth is…

Continue

1964 power steering sector rebuild

Posted by CHRIS CARLSON on March 20, 2023 at 11:32pm 3 Comments

 I'm having my steering sector rebuilt, and considering changing it from 20-1 ratio 4.2 turns lock to lock to 3.5 turns lock to lock @ 16-1 ratio, If i change from a 3 1/4" box to a 3" box i could have a 14-1 Ratio steering response would be faster, shorter distance to turn the wheel to get a response,   has anyone done this? and how do you like it? thank you

1964 Daville dashboard clock

Posted by Willem Bol on March 13, 2023 at 11:33am 2 Comments

Hallo,

Can somebody help me finding a dashboard clock  for my 1964 Cadillac DeVille Convertible?

Thank you in advance,

Willem Bol

The Netherlands

Does anyone know where I can get the bushings for AC compressor mount on the 429?

Posted by Robert Schles on February 21, 2023 at 11:45am 2 Comments

I've looked at the usual rubber sources but couldn't find any. 

Videos

  • Add Videos
  • View All

© 2023   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service