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A/c system flush?

This is a discussion on A/c system flush? within the General Help forums, part of the LSx Technical Help Section category; Im about to replace the entire a/c system on my car with a new compressor, drier, condenser, and orifice tube. ...

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    A/c system flush?

    Im about to replace the entire a/c system on my car with a new compressor, drier, condenser, and orifice tube. Since every thing is new do I still have to flush the system? And how should I go about it? Ive heard its not good to flush the compressor or the condenser.

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    Moderator Cutlass's Avatar
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    I guess the only things left to flush would be the lines/hoses and the evap core. There isn't any need to flush the new components and definitely not the compressor. There also usually isn't any need to flush the system unless the compressor eat itself up and sent metal trash throughout the system.

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    By "flush" do you mean evacuating the system under prolonged vacuum? I have never heard of flushing the AC system before.

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    thats what I thought and Im pretty sure the compressor didnt do any damage because I stopped using it. I just wanted to make sure since this is my first time dealing with the a/c system.
    thanks

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    Quote Originally Posted by Cutlass View Post
    ]There also usually isn't any need to flush the system unless the compressor eat itself up and sent metal trash throughout the system.
    exactly
    im no auto a/c guy but you should be alright as long as the system/oil isnt contaminated which would pretty much only be if you had a compressor burnout.

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    Do any of you know where I can find how much oil needs to be added to the compressor? I looked in the owners manual but it just says look under the hood and the label under the hood tells what kind of oil but not how much.

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    Moderator Cutlass's Avatar
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    like 2 shot glasses worth

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    The spec in the factory service manual for an '02 is 3 ounces. I assume it would be the same for yours.

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    Moderator Cutlass's Avatar
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    Quote Originally Posted by pajeff02 View Post
    By "flush" do you mean evacuating the system under prolonged vacuum? I have never heard of flushing the AC system before.
    There are AC flushing liquids that can be pressure injected through the ac lines. That way I've done it is with the compressor out of the car, I back flush the lines from the orfice tube area back to the compressor. That'll help get the metal debris out.

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    Quote Originally Posted by pajeff02 View Post
    The spec in the factory service manual for an '02 is 3 ounces. I assume it would be the same for yours.
    Are you sure? I keep seeing capacities of 9oz PAG & 24oz of refrigerant for a fresh system.

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    Quote Originally Posted by rbob93 View Post
    Are you sure? I keep seeing capacities of 9oz PAG & 24oz of refrigerant for a fresh system.

    I will check again when I get back home -- at the office now. The manual listed PAG refills from 1 to 3 ounces, depending upon what component was being replaced.

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    Does anyone know orifice tube is located?

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    its in the evaparator inlet tube

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    inlet tube ?

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    thanks, almost done!

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