Ac Recharged with wrong oil from walmart

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Apatel1101, Apr 27, 2019.

  1. Apatel1101

    Apatel1101 Member

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    Hello, yesterday i replaced ( took it out when i did the engine swap) ac compressor. I bought a interdynamics hybrid vehicle oil from auto zone and 20 oz can of stp ultra synthetic r134a. Just read that the can has leak sealent and other additives and that additives are regular pag oil. I only ran for 2 minutes. What are my chances of saving the ac compressor?

    Also read that i need to flush every component but cant find anyone in illinois or wisconsin. If i replace a compressor from ebay and vaccum it for couple of hours. Would that fix it or do i need to have everything pulled and do a flush. Never did flush but i have 4 years of experience with residental and commercial hvac systems. Also called toyota and they said to replace every component which is more than the car
     

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  2. ChapmanF

    ChapmanF Senior Member

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    I would think that replacing the compressor and the receiver/dryer while thoroughly flushing everything else might at least be worth a shot.

    As you've discovered, it's really important (and not as easy as it should be) to find refrigerant that is only refrigerant, without oil or any other "helpful" stuff added.
     
  3. bisco

    bisco cookie crumbler

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    there is a recent thread here reporting that a prius a/c system with the wrong oil has been working for 5 years
     
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  4. Apatel1101

    Apatel1101 Member

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    Would you be able to share the link?
    I am so pissed right now. I love this car but the problems with it never ends for me.

    Anyway you know the procedure for the flush.
    Flush :
    The condenser
    The lines

    Replace:
    Compressor
    Drier.

    Just dont know how to flush the evap because of the txv valve.
     
  5. bisco

    bisco cookie crumbler

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    i don't have it off the top of my head, but i'll look around. iirc, it was a hybrid garage
     
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  6. jzchen

    jzchen Senior Member

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    I’ll try to look also....
     
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  7. jzchen

    jzchen Senior Member

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    Here it is:

    AC Compressor Oil - Interesting Article | PriusChat

    I’ve also read somewhere that PAG is more likely to become conducting when contaminated, but is not conducting in itself, the reason manufacturers switched. That I can not find, was a long time ago.
     
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  8. bisco

    bisco cookie crumbler

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    i can't link, but go to 'fix hybrid.com'

    then go to his blog

    then put in the search bar 'a/c oil'

    then scroll down and select the first link, 'high voltage compressor a/c oil issues'

    all the best!(y)
     
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  9. bisco

    bisco cookie crumbler

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    you beat me, thanks man!
     
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  10. jzchen

    jzchen Senior Member

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    Search function on this forum works pretty well, (if that’s any help to you in the future)....
     
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  11. ChapmanF

    ChapmanF Senior Member

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    Whether the oil is conductive or not would seem to matter more if the compressor windings were bare, which they can't really be (or they'd be shorted out from the get-go, oil or no oil).

    The compressor has to be wound with insulated wire, so a better question about an oil might be not "does it conduct?" but "will it deteriorate the insulating coating on the windings?"
     
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  12. Apatel1101

    Apatel1101 Member

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    Flush is the only option i see. Its snowing in chicago so i can live without it for few weeks. Just ordered new compressor and will flush out the condensor. Should i evacuate the freon and pull the vaccuam or wait till i have the new compressor.
     
  13. jzchen

    jzchen Senior Member

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    At this point I would think your current compressor is still fine. ChapmanF must have a level of understanding that is more than mine, I must confess, but that was my understanding. Everything in vehicles are designed more robust, so preventing a short is what comes to my (honestly) naive mind, if the insulation were to fail...

    Pulling vacuum will remove everything, no? Then just refill with the proper specs. (AC is important for defrost functionality in Japanese and American vehicles I’ve found, good in snow)....
     
  14. ChapmanF

    ChapmanF Senior Member

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    Preventing a short is the name of the game. But insulated wires don't become shorted just because there's conductive stuff around them, unless the insulation also gets damaged somehow (say, by the oil dissolving it).

    And if that's what happens, some amount of damage is going to remain even if all the offending oil is then removed. But maybe it's a slow process (5 years?), in which case one might get away with it.
     
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  15. Apatel1101

    Apatel1101 Member

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    I pulled freon to the recovery tank. Now i am going to pull the vaccum. Then my plan of attack is to add 4oz to the compressor and drain it. Hopefully it carries along other oil
    I wont have this car after 2-3 years. Maybe tho because it still gets 58mpg for my 110 miles commute 5 days a week. Its eazy place to get to evap ports for flush and might aswell replace condenser if i find it cheap.
     
  16. ChapmanF

    ChapmanF Senior Member

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    The article linked above says they put in 5 ounces of the wrong oil, did not have any immediate problems, and then did a complete flush with a HECAT H-1000 flush machine, replaced the compressor, and recharged with the proper oil.

    It reports the A/C working fine 49,000 miles later ... but that does not seem to mean 49,000 miles on the wrong oil. More like 49,000 miles on the right oil, after quickly flushing the wrong stuff out, and with a replaced compressor.

    The HECAT flush machine seems pretty nifty. The solvent stays liquid under the pressure used for flushing, then is boiled and vacuumed out, leaving no residue.
     
  17. Apatel1101

    Apatel1101 Member

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    Update:
    I had both high and low pressure line out and cleaned it. I used compressor to dry it and let it sit in sun for a day. Bought a used compressor ( the seller sent 2012 prius version which some people said wont work BUT IT DOES WORK). Also removed old condenser and broke one bolt so bought new one from ebay. the condenser was in bad shape so i was going to do it anyways. BUY NEW O-RING kit. I changed all the o-rings. just bought a set of 300 from amazon for like $10. Make sure to use hand tools instead of power tools. At last i pulled vacuum and filled PURE 134A freon and ac recharge hose with gauge.

    notes:
    - Before mounting the compressor back. Drain all the oil( mine dint come with any ) So i added 2 oz of ND-11 electric compressor oil for hybrid cars.
    - Buy new set of manifold gauge so you don't contaminate the system again. bought mine from harbor freight.
    - The compressor comes out from bottom so use jack stand and have someone help/watch while you work.
     

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