A/C Experts - How Much 134A Charge?
#1
Nordschleife Master
Thread Starter
A/C Experts - How Much 134A Charge?
Fitting a new compressor and converting to 134a at the same time. Flushed, fitted new seals, new R-D, expansion valve and added 6oz of Polyolester Auto 100 lubricant.
How much 134a do I need to charge? Remember reading somewhere that it's not the same quantity as before the conversion.
How much 134a do I need to charge? Remember reading somewhere that it's not the same quantity as before the conversion.
#2
Rennlist Member
Well, before the conversion, it would have been R12. R134a has a different efficiency and different properties. I bet there's a conversion calculator out there.
But, my hunch would be about 2 lbs. Also, make sure you draw a vacuum first.
But, my hunch would be about 2 lbs. Also, make sure you draw a vacuum first.
#4
Proprietoristicly Refined
Rennlist Member
Rennlist Member
Not sure of your car.
Late info (convert to OZ)
http://www.the944.com/ac/page05.jpg
Early info
http://www.the944.com/ac/page04.jpg
Late info (convert to OZ)
http://www.the944.com/ac/page05.jpg
Early info
http://www.the944.com/ac/page04.jpg
#6
Proprietoristicly Refined
Rennlist Member
Rennlist Member
Right
Usually 6oz Polyolester Auto 100 lubricant is mentioned since you are replacing
the compressor, expansion valve and the RD.
Suggested methods;
3-4 OZ in new compressor.
Compressor may have been shipped with PAG so dump out-turn pully a couple of times and refill with POE.
1 OZ in the condenser. Condenser should be flushed when you replace the compressor.
1 OZ in the line to the evaporator & expansion valve.
GL
John
Usually 6oz Polyolester Auto 100 lubricant is mentioned since you are replacing
the compressor, expansion valve and the RD.
Suggested methods;
3-4 OZ in new compressor.
Compressor may have been shipped with PAG so dump out-turn pully a couple of times and refill with POE.
1 OZ in the condenser. Condenser should be flushed when you replace the compressor.
1 OZ in the line to the evaporator & expansion valve.
GL
John
#7
Nordschleife Master
Thread Starter
Yes that's what I did except I didn't measure out the oil. Put most of the 6oz in the compressor and the rest everywhere else. It's all sealed up and ready for a charge tonight. Thank you for the help