My air is blowing but it isnt cold at all. I bought some r-134a and oil figuring I could add a bit myself but low and behold, it is still setup for r-12. How difficult is the retrofit to accept 134a. I performed the same thing on my 85 Blazer and it didnt seem all that difficult considering I was able to get the system purged at the hobby shop on base for a lot less than a mechanic. Do I need to change out any of the ac components for the retrofit? Thanks in advance.

 

All you really have to do is change the fittings, but the manufacturers always reccomend you change the a/c oil too.
If you come down to Maniacsville i'd be happy to change it over for you.

 

he's right, just get a r12 to r134 retro fit kit from most auto parts store. pep boys, autozone, etc... and it should twist right on. I retro'd many r12-r134 kits and they work like a charm..no problems yet.

 

on a 85 vehicle you may want to consider replacing the o-rings with neoprine ones and replacing the non barrier hoses with new barrier ones. Since the system has been opened, you should replace the receiver dryer. After that you would want to evacuate the system and see if it can hold a vaccum for at least 4 hours to make sure it is not leaking. Then recharge it with r134a to 90% capacity.

r134a is not very rubber friendly