I have had no A/C in my XJ after the accident. I have the A/C lines ready to be dropped in, and I was wondering. Theres a bunch of articles for converting old R12 systems to R134 or R414b, which is also known as hot shot, and is similar to R12, except its cheap like r134. I was wondering if I could fill my already R134 system with R414b. I live in Miami, and im perspiring even in the "Winter".
To do the a/c properly, the evap/cond need to be flushed, new dryer and orifice tube installed (both are filters), oil drained from compressor and correct amount of oil (year specific) added back to system. A vacuum must be pulled (to remove air/moisture) and correct amount of freon added (year specific). Best to have a pro pull a vacuum/add freon unless u have a vacuum pump and a/c gauge/manifold and the knowledge to use them.
I'm looking more for a response concerning the type of refrigerant used. I could just fill it with R134 but from what I've read, 12a and R414 is better, and they are direct replacements for R12. My question is, is it a direct replacement for R134
Your vehicle came filled with R134a. That means all the components were sized to deal with that refrigerant. A PROPERLY WORKING R134a system should be able to cool your XJ, even in Miami. My XJ does just fine here in AZ, where the sun and maximum temperatures are higher than where you live.
Owing to all of the above, I see no reason to deviate from the factory refrigerant and begin experimenting with stuff that may or may not work with the OEM parts.
WANTED--MJ Comanche to restore. Must be solid, (relatively) rust free chassis. Send me a PM if you have a line on one that is for sale.
I don't quite know how to word this... but if the 414 is closer to the old r12 it will work better (r134a is less efficient than r12, it's also more prone to leakage because of the size of the molecule)... but there should be no reason to switch if the ac is working properly... unless you just want to fudge around with it, which i can understand.
__________________ Currently own 93 XJ 33's on 4" lift....01 XJ stock,will replace my 93 after mods are done..... 1994 ZJ V8, BB w/31's........99 XJ stock....97 XJ 2wd 5 spd stock.... and just p/u a 98 XJ 4wd/5 spd and a 01 XJ
I lived on the Gulf Coast, south of Houston for 25 years........u reeeaaalllyyy need a good a/c system. Sorry, I can't help any with regard to those other types of refrigerants.....just don't know anything about 'em, where to get 'em. Are those other refrigerants only available on the Internet?
I've read/heard the stories about R134a not being as efficient as R12 BUT, several years ago, I converted a '90 Chevy P/U from R12 to R134a and it would freeze your butt off, after the conversion. I did have a professional pull a vacuum and charge the system, after I did the conversion. Again, after overhauling the XJ a/c this past June, we see 34F at the center vents (R134a).