New A/c compressor replacement

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Virgil Orly Dela Pena, Aug 15, 2025 at 8:11 PM.

  1. Virgil Orly Dela Pena

    Virgil Orly Dela Pena Junior Member

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    Four
    I recently purchased a rebuilt A/C compressor from Four Seasons for my second-generation Prius and am unsure where to add the hybrid-grade oil. The compressor requires approximately 4.9 oz, but when I tried filling through the drain bolt, it only accepted about 3 oz. The low-side service port can accommodate the full 4.9 oz, yet when I add oil there, it doesn’t flow through to the drain bolt—and vice versa. It appears the two fill points are completely isolated from each other. Should I be distributing the oil between both ports?
     
    #1 Virgil Orly Dela Pena, Aug 15, 2025 at 8:11 PM
  2. Tombukt2

    Tombukt2 Senior Member

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    4.9 is full system you got a bit on condenser lines etc I wouldn't drop that whole amount I don't think . Wen I do reg Denso belt a/c I add about 1 ounce as a general rule . To mix with what's inside the rest of system . Unless replacing most hard parts condenser EVAP in car etc . Most are not replacing all that . I could be doing it wrong I have no idea I know once Ireplace a compressor on a Corolla I generally don't again . I've got 25 yr old Corollas w ice cold air running Enviro temp refrigerant from the 90's still freezing.
     
    #2 Tombukt2, Aug 15, 2025 at 8:41 PM
  3. Tombukt2

    Tombukt2 Senior Member

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    Member there's no hi and low sides till compressor pumps the system up . So hi and lo ports are same . Until
     
    #3 Tombukt2, Aug 15, 2025 at 10:05 PM
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