Waht parts need to be changed in order to change from the old refridgerant
to the newer R134-a???

Thx



BTW how come when I check the email notification it doesnt email me?? I checked the eamil and its fine. Any of yo uknow??


Anderson
88 GTU

 

No parts need to be replaced (the dryer should be replaced as a matter of course), but because R134a is not compatible with the mineral oil in your compressor, it must all be flushed out and replaced with synthetic oil.

 

You really want that kind of work done by a professional (or a friend with an AC shop.)

 

This one takes some care.
If you don't do it correctly, your car will only cool for a couple of months, and then your compressor will be destroyed.
You must remove ALL the old refriferant oil. The new R-134 combines with the old oil to form a destructive acid.
You need to flush out your evaporator and condensor with mineral spirits or something moes sophisticated (like MEK) and blow it dry with compressed air. You need to remove your compressor and flush it out multiple times (the smart guys put on a new compressor),
You need a different drier, and BLUE o-rings where necessary.
The smart guys often put in all new hoses (Barrier Hose).
That is it!
If you cut corners on this you will need a complete new system.

 

Is there an alternative to the 134a?

 

There are only 2 refrigerants that work reliably in our cars; The original R-12 and the R-134 conversion.
There are a half dozen "MICKEY MOUSE" products out there billed as a direct replacement for R12.
None work as advertised, many cause severe problems, some are explosive.
I can eMail you lots of data on this if you want.
Do it right or don't do it.

 

I did this myself last summer....A/C still fine almost a year later. I used next gen brake cleaner to flush all the lines, compressor, evap. / condensor. I put on new o rings from an autoparts store (dirt cheap) and got a retro fit kit for like $35.00. The A/C cools great and it was cheap. I did put on a new drier AND you have to pull a vac. on the system (I used an old refrigerator compressor to pull the vac. for a couple of hours). Anyway....moral of the story....you can do it yourself, it does take a while though.

Todd

 

Well about 2 years ago I didnt know much about my ac system and I ahd a guy MIX the r-134 with the R-12 and 2 moths later, the lines that conect to the compresor blew.

My Question is this:
Shoudl I buy a used compresor of somebody and chage ITS oil along with all the stuff to chan ge in my car, or shoudl I be fine replacing the oil in my current compresor.


I know it was a stubpid mistake but hey atleast I can tell peopel what NOT to do

 

Replace the compressor,
FLUSH - FLUSH - FLUSH everything.
Get the new drier and o-rings.
You may have so much crud in the evaporator and/or condensor that they are junk also.