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A/C expansion valve

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Old 07-25-2010, 10:45 AM   #1
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A/C expansion valve

Hey everyone. I just replaced my expansion valve on my 96 4runner and have everything hooked back up with a vacuum pulled. I am a hvac guy, but since I did not replace the compressor I do not know how much oil I should add to the system. I have a 1oz. Do you think that would be enough? Thank you everyone for your information.
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Old 07-26-2010, 10:29 AM   #2
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If you didn't lose any oil you don't really need to add any, although adding some with dye would be a good idea. 1 oz should be fine added to the low side.
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Old 07-26-2010, 08:07 PM   #3
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You don't need to add any oil. If you have access to a charging scale charge the system by weight. Even though its got a expansion valve its really finicky about the charge and very easy to end up with a couple OZ too many or too little when charging with gauge/eyeball method.


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