a/c recharge
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Cadillac Seville / Cadillac Eldorado Forum Discussion, a/c recharge in Past Cadillac Vehicle Discussion; So tomorrow I am probably going to recharge my ac. A friend of mine has the ac recharge machine, so ...
  1. #1
    eldorado_sean's Avatar
    eldorado_sean is offline Cadillac Owners Fanatic
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    a/c recharge

    So tomorrow I am probably going to recharge my ac. A friend of mine has the ac recharge machine, so we will be using that.
    Is there a special procedure you need to do before or after the recharge? And how much 134 refrigerant will the system take if its completely empty? (98 eldorado)

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    MoistCabbage's Avatar
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    Not sure what the capacity is, but you need to find the leak first.

    ...And if your friend doesn't know how to charge an A/C system, he shouldn't be using the machine.

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    Ranger's Avatar
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    Re: a/c recharge

    If the '98 is the same as the 2000+ it holds 2.2 lbs or refrigerant. You have to clear any low refrigerant codes to enable the compressor and draw a vacuum first, but if your friend has an expensive A/C machine I would assume he has a shop and knows how to use it.

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    basscatt's Avatar
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    Re: a/c recharge

    I hope by "AC MACHINE" you are referring to a real recharging station -
    and you DON'T mean the mickeymouse single gauge can-tapper -

    if your system was/is low on freon there IS a leak somewhere -
    and that leak needs to be found/fixed -

    Is there a special procedure you need to do before or after the recharge

    ignition ON - clear all codes -

    ignition OFF - evacuate the system -
    vacuum the system down to 29" for MINIMUM of 15 minutes -

    turn the vacuum pump off -
    verify the system maintains the 29" of vacuum for a MINIMUM of 15 minutes -

    with the engine OFF - start charging the freon -
    when one can - or one pound of freon is in the system -

    start the engine - turn the AC ON -
    set the temp to 60* -
    fan to medium speed -

    the compressor will cycle on and off as more freon enters the system -

    the cycling should stop after the second pound - full charge is 2.2 pounds -

    to verify proper AC operation -
    with the engine at a high idle - 1500-rpm -
    the air emitting from the center vent should be 37* to 42* -
    with an ambient temp of 85 or less -

    HIGH side pressure should be around 175 to 225 -
    LOW side pressure should be around 30 to 35 -

  6. #5
    eldorado_sean's Avatar
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    Yes he has the real a/c charging machine. I was asking this because I didn't know if Cadillac's ac system had a different procedure of recharging.

    Another question... does the system hold refrigerant after dropping the engine? Or do I have a leak???

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    basscatt's Avatar
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    Re: a/c recharge

    Quote Originally Posted by eldorado_sean View Post
    Yes he has the real a/c charging machine. I was asking this because I didn't know if Cadillac's ac system had a different procedure of recharging.

    Another question... does the system hold refrigerant after dropping the engine? Or do I have a leak???
    ------------------------
    does the system hold refrigerant after dropping the engine?
    Or do I have a leak??

    there is no connection between the engine and the AC system -
    other than the engine spins the compressor -

    depending on HOW the engine was removed -
    would determine whether or not the AC system was opened or not -

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    Ranger's Avatar
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    Re: a/c recharge

    Quote Originally Posted by eldorado_sean View Post
    Another question... does the system hold refrigerant after dropping the engine? Or do I have a leak???
    It all depends on how it was done. The compressor COULD have been dismounted and left in place without opening the system, but I think most open it and remove the engine with the compressor still mounted.

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