Quote:
Originally Posted by ps2cho
Ignoring the pressures is asking for trouble. If I just willy nilly charged by weight then I'll have the compressor blow a seal as pressures would easily get above 450psi...you MUST use gauges, every time!
Thanks for the line info. I ordered a Infrared Temp Gun and I'll get a readout across all the lines and see what it shows and reply back at that time.
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Charging by weight is the only truly accurate way of recharging a system. The car should never get pressures that high, there is a cutout switch on the high pressure line for those situations. Also, the fans should be running full speed after 350 psi.
You keep thinking that because you had 350 psi with 12 oz of r12 in , that you will have 3x the pressure with 3x the refrigerant in. This is not true.
The system is already pumping at capacity the moment there is enough refrigerant in there to liquify. Remember, the refrigerant is the stuff that absorbs the heat from the cabin. With only 12 oz in, there is not enough for you to notice a difference. The system is is working at full pressure, just not enough volume to make a difference. Just charge the system 2.2 lbs, or 1 kilo, and be done with it.