This procedure adds the correct amount of PAG oil to the AC compressor to ensure proper lubrication and prevent compressor damage after oil loss or component replacement.

Warnings

Tools required

Parts

• AC line O-rings × 2 — Use OEM specification
• PAG oil ND-11 or equivalent × 1 — Toyota ND-11 PAG oil

Fluids

• PAG oil ND-11 (varies by need, typically 1-3 oz) — 0.1 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Allow engine to cool completely if recently operated
3. Verify AC system refrigerant type (R-1234yf for 2018-2024 Camry)
4. Determine correct oil quantity needed based on service performed or oil loss
5. Ensure PAG oil is fresh and sealed (PAG oil absorbs moisture rapidly when exposed to air)

Procedure

1. 1

   Recover refrigerant from AC system
   Connect AC recovery machine to service ports. Follow machine instructions to completely recover all refrigerant from the system. Verify system is at 0 PSI before proceeding. Record amount of refrigerant recovered for proper recharge.
2. 2

   Access AC compressor
   Remove engine splash shield if necessary for access. The compressor is located on the passenger side of the engine, driven by the serpentine belt. Identify the suction line (larger diameter) and discharge line (smaller diameter) connections on the compressor.
3. 3

   Disconnect AC line from compressor
   Disconnect the suction line fitting from the compressor. Use two wrenches to prevent twisting the compressor port. Immediately cap the open connection to prevent moisture contamination. Remove and discard the old O-rings from the fitting.
   ⚠Small amount of residual oil may drain from connection. Catch with shop towel and measure quantity if assessing total system oil.
4. 4

   Drain and measure existing compressor oil
   Slowly rotate the compressor clutch by hand while draining oil from the suction port into a clean graduated container. Continue rotating until no more oil drains. Record the amount of oil removed. This helps determine if system oil level was correct before service.
5. 5

   Add fresh PAG oil to compressor
   Using PAG oil injector tool, add the specified amount of fresh ND-11 PAG oil through the suction port. For routine oil addition, add equivalent amount that was drained plus any required makeup quantity. If replacing compressor or other components, follow Toyota specification for total system oil capacity (typically 120-150ml total system capacity).
   ⚠Do not overfill. Excess oil will reduce AC efficiency and may damage compressor.
6. 6

   Rotate compressor to distribute oil
   After adding oil, slowly rotate the compressor clutch by hand 10-15 complete revolutions to distribute oil internally and prevent hydraulic lock when system is started.
7. 7

   Install new O-rings and reconnect line
   Install new O-rings on the AC line fitting. Lightly coat O-rings with fresh ND-11 PAG oil. Reconnect the suction line to the compressor and torque to specification using two wrenches to prevent compressor port rotation.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
8. 8

   Evacuate AC system
   Connect evacuation equipment to service ports. Evacuate system to at least 29 inches of mercury (inHg) vacuum for minimum 30 minutes. System should hold vacuum without rising for at least 10 minutes to confirm no leaks.
9. 9

   Recharge AC system
   Recharge system with the amount of R-1234yf refrigerant that was recovered (or per specification if system was empty). 2018-2024 Camry 2.5L requires approximately 450-550 grams total. Monitor pressures during charging to ensure proper fill.

Reassembly

1. Reinstall engine splash shield if removed
2. Double-check all AC line connections are tight and properly torqued
3. Verify no tools or parts are left in engine compartment

Verification

• Start engine and turn AC to MAX cool with blower on high
• Verify compressor clutch engages and compressor operates smoothly without noise
• Check AC line connections for refrigerant leaks using leak detector
• Confirm center vent temperature reaches 40-50°F within 5 minutes of operation
• Verify proper AC pressures: low side 25-35 PSI, high side 200-280 PSI at idle with 95°F ambient
• Listen for unusual compressor noise that could indicate incorrect oil level

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