Cranky1
Banned Old Stinky Fart
?? I know there should be a label but I'm checking for a friend that hasn't spotted it yet....
What type of freon was used in a 91 Dakota....
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Cranky1
Banned Old Stinky Fart
Found a chart that says r12. What do have to do to use 134?
7mopar
Well-Known Member
Ports will have to be changed as well as the compressor oil.
65 sporty
Well-Known Member
You can do it yourself, get a kit that has the fittings and retrofit label, replace the receiver/drier and the fittings. I would also change the expansion valve. Add the required amount of oil, I prefer PAG oil over Ester. Most Mopars take PAG 100. You can charge it yourself or take it to a shop, have them draw the system into a deep vacuum then charge it. Start with 80 percent charge, but you can go up to 100 percent charge of the R134A. There should be a sight glass on the receiver/drier, when the air is gone it's full.
7mopar
Well-Known Member
I got the Ester, fittings and a new seal kit. The compressor still works but the system has not been operational for years. Some day it may work again. As for the expansion valve some say to leave it others replace it. I really need a better vacuum pump.
Cranky1
Banned Old Stinky Fart
My vacuum pump isn't the world's greatest.....but I might not be getting this truck anyways. Sure would like to because it only have 40k miles on it and it's still pretty nice.