Question about 2005 Nissan Altima 2.5

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What does a new air compressor need before adding frion

I recently bought a new air compressor, does it need oil before adding the frion?

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  • Nissan Master
  • 20,706 Answers

Did you read the FSM yet or at alldata.com yet,then ask about steps
there that are confusing, or ??? any thing?
air? what air?
the steps for A/C HVAC are all the same.
1: capture the old Freon (liquid gold) or go to jail. (USA)
2: run cleaner through system, to get the debris from death of old compressor out, (if the expansion valve is packed it's hopeless)
3: back together. now. with new receiver dryer.
4: pump it down with the vacuum pump, this removes all moisture , that kills Freon(tm) Dead. A/C loop hates water, in any form.
5: Add the R134 oil. (new unisiveral type)
6: add the freon by weight, do not overfill. FSM tells this,,,, read it.
7; Run it and adjust freon amounts, per the tables in the FSM.
The table shows 2 things, (input) air temp, and humidity, then adjust
pressure per chart.
8: using a vent thermometer check that the system really is at spec.

(i do the elect side, the above, is the loop side. and above is SHORT LIST)

Posted on Jun 23, 2014

  • _-__-___-_
    _-__-___-_ Jun 23, 2014

    alldata.com log in and read HVAC chapter, please.

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  • Nissan Expert
  • 180 Answers

Read the directions, in most cases you need to drain the shipping oil in the compressor the refill with the proper type and amount. Go to a reputable parts store in your area and they should supply you with the proper stuff

Posted on Jun 23, 2014

  • Lynsie Jo Booth
    Lynsie Jo Booth Jun 24, 2014

    Agree with solution 2. Flush out old oil with old compressor before adding new.

  • jagornot Jun 24, 2014

    Thanks, number 1 gives the proper procedure to flush and refill. I think he is right too. Hope you have the equipment needed. You should take it to a a/c specialist because you do need to vac it to get all the air out of the system.

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