trans87

My AC system leaks and the compressor made noises when it was full. So I am going to redue the AC system and use 134a. My questions is what should I replace when I redo the AC system? Can someone give me a list of things I need to buy to freshen up my AC? Thanks.

Danno

Replace the hoses, O rings, accumulator and orifice tube. I don't know about aftermarket but all new rubber components supplied by GMSPO are 134/12 compatible.

trans87

Ok my list is as so far:

1. Compressor
2. Orifice tube
3. Accumulator
4. AC hoses
5. O rings

Am I missing anything? Anything I might want to pick up to make the job easier? Thanks Danno for the help so far.

trans87

So I guess I covered everything right? All this stuff should be available at the local parts store right?

Danno

Hoses may not be a stocked item, but they can order them. Make sure if you go aftermarket that the hoses are 134 compatible, or "barrier" type hoses. Service fittings are different also, get new ones for 134. Other than the equipment to service the system you have it covered.

90Formula-X-F

Hoses are not required replacement unless you fear one is leaking.

Accumalator, Compressor and orfice tube and necc orings as required to service these Items. Flush system throughly with A/c Flush and blow it out with compressed air. ( as in the condenser, hoses and evap core.) Drain compressor and add the proper amount of POE oil .. POE is a synthetic ester oil and is copatable with either R12, Freeze 12 or 134A. Deep evac on system and charge it with a slight less amount than you'd use R-12. I do a couple 3 of these a week. My grandfather and my dad were refigeration tech's from way back so I have been exposed to the stuff. I am also a ASE master tech who in my area am the keeper of the cold air. People love me this time of year..LOL

trans87

Thanks you guys, you have been great help. I will see about getting the stuff together as soon as I can so I can have AC again. Man this summer has been hot

OMINOUS_87

Make sure you run the green o-rings for 134a. Also flush everything out real good and use Ester oil not Pag with the conversion. Put 4 ounces of the oil in the compressor and 2 ounces in the dryer. Also dont forget to suck the system down for an hour or so before charging it.

Here is a good article

http://www.iroczone.com/newindex.htm

Stingraye

The ONLY things you need for a changeover to go from R12-134A is a new accumulator, and a changeover kit, which many places will have a kit with the ester oil, all new o-rings, and the quick disconnect fittings, this generally only costs about $30, and the accumulator is about $80 from GM. I know all this for a fact, because I just did it in my class at one of the top rated Automotive schools that I attend today in class, because I am in the AC class. You do not need a new compressor unless yours is shot, nor do you need new hoses unless for the same reason. If you're not sure about flusing and vaccuming the system, save yourself a lot of hassle and problems and take it somewhere that has all of the proper machines to get it all done right and quick.