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  1. #1

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    a/c compressor replace- how much oil to add??

    im replacing the compressor on my car and i need to know how much pag oil to add to it when i replace it? im planning on doing this tomorow so responses asap would be great. thanks.
    1997 Bonneville SSEi, L67, HUD, 9-way power leather seats, sunroof, exhaust leak, hauls ass. *Traded, miss it*
    2006 Eclipse GT, 3.8 V6 SOHC w/ tiptronic, CAI and high flow muffler. Fast car. *Sold*
    2002 Impala LS, L36, loaded, Billet grille, K&N air filter. Granny mo-bile. *Sold*
    1998 Regal GS, L67, Customer CAI, 180* stat, more to come. *Current*

  2. #2

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    Re: a/c compressor replace- how much oil to add??

    get some cups... and...
    remove the old compressor from the vehicle.
    Drain all the fluid out of the port on the back into a cup, turn the compressor by hand while doing so to help evacuate fluid.
    Remove a bolt on the side of the compressor to drain the internal fluid into another cup.


    Is this a new compressor you are putting on?
    If new, it may already have fluid inside, drain it into another clean cup, and it will be safe to remove and re-use if kept clean. If used, drain as above.


    Put about the same amount back in as the original had in each location. You must put at least 2 ounces in even if you did not get two ounces out.

    I turn the compressor by hand to make sure fluid gets around.. and install on the car.




    Don't forget to replace or clean the orifice tube, which is the filter for the a/c system. it is located on the drivers side frame rail at a joint below the cruise control.


    BUILDER AND DESTROYER OF FINE(?) AMERICAN CARS.

  3. #3

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    Re: a/c compressor replace- how much oil to add??

    i believe its a reman. compressor. so do i put 2 ounces in the side bolt and 2 ounces where the lines connect or just one of the locations?
    1997 Bonneville SSEi, L67, HUD, 9-way power leather seats, sunroof, exhaust leak, hauls ass. *Traded, miss it*
    2006 Eclipse GT, 3.8 V6 SOHC w/ tiptronic, CAI and high flow muffler. Fast car. *Sold*
    2002 Impala LS, L36, loaded, Billet grille, K&N air filter. Granny mo-bile. *Sold*
    1998 Regal GS, L67, Customer CAI, 180* stat, more to come. *Current*

  4. #4

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    Re: a/c compressor replace- how much oil to add??

    total.


    BUILDER AND DESTROYER OF FINE(?) AMERICAN CARS.

  5. #5

    Re: a/c compressor replace- how much oil to add??

    When I did mine, I got a GM compressor. I emptyed the stuff they put in there from the factory and put that exact amount back in and a little extra along with some in the lines for the seals.

    Mark

  6. #6

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    Re: a/c compressor replace- how much oil to add??

    Is it a bad thing that I didn't drain my compressor before refilling the empty system with 2 more cans of pag oil?

  7. #7

    Re: a/c compressor replace- how much oil to add??

    You used two whole cans of oil? I don't know about your car, but mine only takes about 15oz total.

  8. #8

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    Re: a/c compressor replace- how much oil to add??

    i went to napa to get the oil, and they dont even have it!
    1997 Bonneville SSEi, L67, HUD, 9-way power leather seats, sunroof, exhaust leak, hauls ass. *Traded, miss it*
    2006 Eclipse GT, 3.8 V6 SOHC w/ tiptronic, CAI and high flow muffler. Fast car. *Sold*
    2002 Impala LS, L36, loaded, Billet grille, K&N air filter. Granny mo-bile. *Sold*
    1998 Regal GS, L67, Customer CAI, 180* stat, more to come. *Current*

  9. #9

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    Re: a/c compressor replace- how much oil to add??

    the cans I used were 8oz each, so yeah, two cans.

  10. #10

    Re: a/c compressor replace- how much oil to add??

    Quote Originally Posted by xtremerevolution
    the cans I used were 8oz each, so yeah, two cans.
    Oh, ok. When you said can I was thinking of the size I have, 32oz. When you put in that oil, did you replace any parts? If not, you probably have double the oil in there than you're supposed to have. I'm not certain, but I think the only drawback of too much oil is poor cooling performance. Too little oil could damage the compressor.

  11. #11

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    Re: a/c compressor replace- how much oil to add??

    Quote Originally Posted by Quaraxkad
    Quote Originally Posted by xtremerevolution
    the cans I used were 8oz each, so yeah, two cans.
    Oh, ok. When you said can I was thinking of the size I have, 32oz. When you put in that oil, did you replace any parts? If not, you probably have double the oil in there than you're supposed to have. I'm not certain, but I think the only drawback of too much oil is poor cooling performance. Too little oil could damage the compressor.
    I did replace the accumulator, orifice tube, and all of the o-rings in the system, but did not drain the compressor. Would there have been much oil left in the compressor?

  12. #12

    Re: a/c compressor replace- how much oil to add??

    Quote Originally Posted by xtremerevolution
    I did replace the accumulator, orifice tube, and all of the o-rings in the system, but did not drain the compressor. Would there have been much oil left in the compressor?
    When you replace the accumulator you're only supposed to add 3.5oz. Of course there's no way to tell how much is really in every part without draining and measuring them all, but it's at least a good guess as to how much oil should have been in it. If you had a large refrigerant leak you should add 3oz, plus whatever is suggested for the part(s) you replace.

    This is what my '92 Cutlass manual says, it's r12 but r134 is similar.
    Evaporator: 3oz
    Condenser: 1oz
    Accumulator: 3.5oz
    Compressor: Drain old compressor and measure oil. If you measured less than 1oz, add 2oz to the new compressor. If you measured more than 1oz, add that same ammount to the new compressor.

  13. #13

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    Re: a/c compressor replace- how much oil to add??

    How does one drain the compressor?

  14. #14
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    Re: a/c compressor replace- how much oil to add??

    Remove it from the vehicle and dump it out while turning the compressor over by hand.
    Jeff L. :: 2nd Canadian to win COTM The Preservation for POS W-bodies Canada Chapter
    2004 Acura TSX | 2.4L I4 iVTEC; 5 Speed Auto | 1 of Many Made In '04 | 89,XXXKM
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    1985 Mazda RX-7 S | 1.1L 70ci 12A Twin Rotor RE; 5spd | 1 of 63,105 Made in '85 | 130,XXXKM

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