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Charging to high side

rex on Mon May 18, 2009 8:42 AM User is offline

Year: 2002
Make: Subaru
Model: WRX
Refrigerant Type: R134a

I'm about to evacuate and recharge my system. Everything I've read says to only charge to the low side, but I have the factory service manual for my car and it says to charge to the high side (high-side valve open, low-side valve closed), with the engine OFF, until the high and low side pressures are about equal. Then close the high side valve, start engine, cycle AC a few times, and charge to low side with AC running until at proper pressure.

Should I follow the factory recomendations, or am I going to explode my little can of 134a by doing that, or what? I'm leaning towards following the factory service instructions, but I'm hesitant since everything else I read seems to say not to do that and I like having 10 fingers.

PS - I'm a newb to AC service.

Edited: Mon May 18, 2009 at 8:56 AM by rex

Chick on Mon May 18, 2009 10:44 AM User is offlineView users profile

after you pull your vacuum, you can charge "liquid" into the high side, ENGINE OFF, then close the high side valve and finish charging the correct amount into the low side while running.. ..hope this helps..

Email: Chick


Freedoms just another word for nothing left to lose

rex on Mon May 18, 2009 7:35 PM User is offline

Cool - thanks for the help, Chick!

How ironic - I'm waiting for it to cool down a little outside so I can fix my A/C...

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