Engine Size: 3.1
Refrigerant Type: 134
Country of Origin: United States
Our 96 Lumina has sat unused for about a year. The A/C has leaked down. I want to vacuum the system and recharge. Is it a required/good idea to replace the dryer and orifice tube? Last time the car was used, the A/C worked only so-so. Any other suggestions?
Hi Rich; Normally, no, you would not replace the dryer or orifice tube through normal use. You would always replace the dryer if the system was opened up for repairs, which I assume it was not. The car is 14 years old, was marginal a year ago, and appears to be normal leakage. Pull a good vacuum for at least a half hour, close gages and see if vacuum holds. If it drops down slowly after you shut it down, you have a leak, which should be repaired. If it holds vacuum, many like to put as much a charge through the HIGH side line WHILE THE CAR IS NOT RUNNING-DO NOT run the car, just let it go into the high side till it stops taking the charge. SHUT HIGH SIDE knob and KEEP IT CLOSED. Start the car, turn on A/C, open the doors to work the A/C hard, let the rest go in the LOW side till you have filled it to the weight for that vehicle. Should be good to go.
Edited: Sun May 30, 2010 at 6:52 PM by fonebone
A/C systems are not designed to leak down. Not even over a year. They are supposed to be a sealed system. If you are low on refrigerant, you have a leak. First thing you need to do it recover the refrigerant in there, then, leak check the system, fix the leak, replace the accumulator since you have opened the system and it is probably the original one anyways, and recharge the system.
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