North American Turbocoupe Organization

a/c check list for R134a conversion
trashline Offline
Posting Freak
just want to verify what i need to convert to R134a.
1. accumulater
2. orfice tube
3. conversion kit with all new seals and connecters
4. freon and oil
5. have system evacuated
6. pull vacuum to check for leaks and remove moisture.

1966 mustang
1988 tbird

06 Cobalt SS
66 mustang 289 C4 handfully modded

Stingers IC install and tbird photos

Keith Nubel Offline
Posting Freak
The orifice tube is built into the liquid line, so you may have to replace the whole line. The orifice tube strainer can become restricted. I replaced the entire liquid without the orifice tube and installed an orifice tube directly on the evaporator. Pressure test the system before you evacuate. If the system is pressure tight the evacuation process(vacuum) will dry the system if done correctly.If the system leaks the vacuum will suck in air and moisture and contaminate the system. I also flushed my system and got some nasty black oil out of it. Some guys pressure test with air. I would never never never suggest doing that. You should pressure test with refrigerant or nitrogen.

85.5 TC 5 speed, Ranger Roller cam, 3" exhaust system, manual boost valve, large VAM, SVO PE computer, front mount Motorsport intercooler & sport grille, ported upper and lower intakes,flow matched injectors, ported E6 manifold, 245/45/17 wheels & Tires,Motorsport 140 mph speedometer,Motorsport lowering springs, Kenwood EZ500 200 watt receiver with Cerwin Vega speakers sound system, air conditioning converted to R134A and Sanden compressor retrofit kit installed, under restoration
1985 TC

Pete D Offline
Check out this site posted by Matt S. Looks like some good info
Pete Dunham


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