A/C conversion to R134A
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Trailering
Joined: Sep 2016
Posts: 15
Likes: 1
From: East central Alabama
A/C conversion to R134A
I have a stock 1990 F-250 7.5 4x4 that has factory air but it hasn’t worked in 15-20 years. It’s time to make it work again. What parts do I need to swap out to use the R-134A or R-134yf? I know the compressor turns, but it’s 33 years old. Should I just swap out every part of the AC?
Thanks!
Thanks!
Lead Driver
Joined: Feb 2002
Posts: 7,958
Likes: 592
From: Greater Austin, Texas
If money is not a problem, yes, change it all out to the stuff from a 94-96 truck which were R134a from the factory. Generally speaking, the more you spend on such a conversion, the longer it lasts.
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Trailering
Joined: Sep 2016
Posts: 15
Likes: 1
From: East central Alabama
I might do that, it may spend more time with me than originally planned. Is there a good schematic somewhere that lists all of the parts? I know the usual stuff but this 90 is newer than most stuff I’ve worked on (usually pre-64)
Lead Driver
Joined: Sep 2002
Posts: 9,520
Likes: 2,028
From: North Texas
https://www.ford-trucks.com/forums/1...-to-r134a.html
Good start, scroll down towards bottom. And yes, just buy all new stuff. 1990 was 33 years ago, anything on there is probably crap.
Main advantage of 94+ stuff is the condenser. Easy enough to retro if you cannot acquire a small tube or parallel flow unit drop in. One line is diff outlet wise. I outlined it in my 4.9 resurrection thread with the truck named Frijole. I did a 94 condenser in it as 92 PF was not in stock for the longest time and I have an AC hose crimping tool.
Evap is slightly different dimensionally, not enough to write home about.
Good start, scroll down towards bottom. And yes, just buy all new stuff. 1990 was 33 years ago, anything on there is probably crap.
Main advantage of 94+ stuff is the condenser. Easy enough to retro if you cannot acquire a small tube or parallel flow unit drop in. One line is diff outlet wise. I outlined it in my 4.9 resurrection thread with the truck named Frijole. I did a 94 condenser in it as 92 PF was not in stock for the longest time and I have an AC hose crimping tool.
Evap is slightly different dimensionally, not enough to write home about.
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