1981 a/c upgrade
Melting Slicks
Joined: Feb 2017
Posts: 3,232
Likes: 1,232
From: PHX AZ
CFC 134A kits are available...mostly fittings and Schrader valves.... less than $60
The difficulty is purging the entire system from Pag oil to Ester oil...which requires cleaning the whole system and blowing the cleaner out.
Removing all oil from the compressor, and replacing it with the correct amount of oil (small amount into the compressor and the rest) for the whole system. This is the same AMOUNT of oil as the original R-12.
Replacing the receiver dryer is a must!
So I'll estimate $150 in parts and about 4 hours labor.
unkahal
The difficulty is purging the entire system from Pag oil to Ester oil...which requires cleaning the whole system and blowing the cleaner out.
Removing all oil from the compressor, and replacing it with the correct amount of oil (small amount into the compressor and the rest) for the whole system. This is the same AMOUNT of oil as the original R-12.
Replacing the receiver dryer is a must!
So I'll estimate $150 in parts and about 4 hours labor.
unkahal
Melting Slicks
Joined: Jun 2000
Posts: 3,431
Likes: 298
From: MN-C3, AZ-C7
Using the search engine I found good info on upgrading my ‘81’s compressor (which i’ve had rebuilt twice and failed again), to a Sanyo(spelling). This requires a new condenser to work with today’s refrigerants. I ran out of time this summer to do it but next year!
Last edited by John Ulrich; Oct 17, 2019 at 08:56 PM.
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,027
These A/C compressors are trash. They just don' t last. I would like a Sanden, but keep the rest stock.
