: A/C problem 79



Mojochiken
05-18-06, 11:25 AM
79 coupe changed over to the new stuff. When it's full the clutch starts and stops. It doesn't feel cold, I put dye in it and I can't see anything dramatic. I'm really tired of this problem, can I get a whole new system?

77CDV
05-18-06, 11:23 PM
When you say changed over to the new stuff, you mean new compressor, etc., or just dropped in R134? If the latter, it won't work.

Mojochiken
05-18-06, 11:47 PM
switched to r134, what do you mean it won't work?

Mojochiken
05-18-06, 11:47 PM
switched to r134, what do you mean it won't work?

77CDV
05-20-06, 03:20 PM
r12 and r134 are completely different compounds and require different hardware to operate. If r134 is put into a system designed for r12, the system will not work properly, and will develop leaks in short order as the seals and 0-rings in an r12 system are incompatible with r134.

Mojochiken
05-22-06, 09:33 AM
Well that sucks. What can I do to get the a/c system working with the 134a? Where should I take it to serviced without getting hosed.

77CDV
05-22-06, 02:51 PM
Mojo,

If you want to use R134a, you will need to have the entire system (condenser, compressor, etc.) replaced with components designed to operate on R134a. Last I checked, this was a roughly $1200 job. There is, however, good news. There is a drop-in replacement for R12 called R414b, manufactured by ICOR. However, as it must be charged into the system in a liquid state at very specific pressures, it is not recommended as a DIY job. I don't know how much it costs, and since you have contaminated your system with R134a, your system will need a complete flushing and the seals, hoses, and oils will need checking and possible replacement before a system recharge with any refrigerant. Good luck.

Craig

Mojochiken
05-22-06, 04:10 PM
Sounds like good stuff. I'll try to find a place to get that done and let you all know how it goes. Thanks