Question about 1999 Honda Civic

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1999 honda Civic Ex 5sp. I'd like to know how many PSI of freon should i put in the ac lines. I replaced my ac compressor and I have the freon gage (the one that has the blue and red gages). I know how to plug the 2 hoses into the 2 lines. but I'm not sure how much PSI of freon to add. thanks

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HI. A good pressure will be near 80 lbs on the blue side and, roughly, 140 Ibs on the red side. Be sure to hook up the A/C gauges to the system with the red line going to the high side (the small line) and the blue line going to the opposite, large-diameter, low-pressure side.

NOTE_ the stated pressure rates should be present with the engine off.

Posted on Jul 09, 2010

  • 3 more comments 
  • Michael Masters
    Michael Masters Jul 09, 2010


    • NOTE_Total pressure should be around 400 psi when the compressor is running and clutch engaged.


  • Michael Masters
    Michael Masters Jul 09, 2010

    NOTE_ Only 18oz should be inserted into the system. No more no less.

  • Michael Masters
    Michael Masters Jul 10, 2010

    NOTE_ The temperatures may fluctuate your reading, so for example:

    At 1500 rpm on an approximately *80F day in the shade:

    Low side should be between 22-36 psi
    High side should be between 220-295 psi

  • SERGIO S ROSA, JR Jul 10, 2010

    how do I know how much freon I put in?

    Is there a special tool to measure?

    thanks

  • Michael Masters
    Michael Masters Jul 10, 2010

    Actually; this is not for the novice. A very expensive reclaimer must be used to adjust the Freon level, during recharging.. An ASE technician certification and a MACs card is needed to own one, so you must go to a shop for further diagnosis. You could injure yourself at this point.

    With that said, you will need to evacuate the system at you local oil change garage before recharging. You should only use up to 18oz of your recharge reservoir. look on the can to see how much is actually stored in the recharge refrigerant can you purchased.

    Procedure:

    1.The proper procedure will be to start the engine and set the air conditioner to its maximum setting. Open the valve and allow the coolant to be sucked into the system. This usually takes about ten minutes. Don't shake or turn the can, simply allow it to empty while upright. Once the coolant in the can has been dispensed, pull the nozzle from the low pressure port by pulling up on its outer ring while simultaneously pulling the nozzle. Turn the can of coolant counterclockwise and dispose of it.

    2.Repeat Step 1 by using a can of compressor lubricant. This lubricant can already be added to the coolant, but typically they are separate. Allow the can to empty, then remove it as before. Continue this process with more coolant until the system does not take in any more. Civic air conditioning systems use about one and a half to two cans of coolant and a can of lubricant.




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