This procedure covers replacement of the AC compressor clutch assembly on a 2018-2024 Toyota Camry with 2.5L I4 engine, including refrigerant recovery, clutch removal, and system recharge.

Warnings

Tools required

Parts

• AC compressor clutch assembly × 1 — Use OEM specification
• AC line O-rings × 2 — Use OEM specification
• PAG oil for AC system × 1 — ND-11 or equivalent
• R-1234yf refrigerant × 1 — As needed for system capacity

Preparation

1. Ensure engine is completely cool before beginning work
2. Disconnect negative battery terminal and wait 90 seconds
3. Remove engine under cover to access compressor from below
4. Recover AC refrigerant using certified recovery equipment and document quantity removed
5. Take photos of serpentine belt routing for reference during reinstallation
6. Verify new clutch assembly matches existing part number and configuration

Procedure

1. 1

   Remove serpentine drive belt
   Using a 14mm wrench on the tensioner pulley, rotate tensioner counterclockwise to release belt tension. Remove belt from all pulleys including AC compressor. Inspect belt for wear and replace if necessary.
2. 2

   Disconnect AC line fittings
   Remove the two AC line fittings from the rear of the compressor. Cap all open lines and compressor ports immediately to prevent moisture and debris contamination. Discard old O-rings.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
3. 3

   Disconnect compressor electrical connector
   Press the tab on the clutch coil electrical connector and pull straight off. Move harness aside to provide clearance for clutch removal.
4. 4

   Remove clutch hub snap ring
   Using snap ring pliers, carefully remove the large snap ring that retains the clutch hub to the compressor shaft. The snap ring is located in a groove on the front of the compressor shaft. Keep snap ring for potential reuse if undamaged.
   ⚠Snap ring is under slight tension. Wear safety glasses and control removal to prevent snap ring from flying off.
5. 5

   Remove clutch hub assembly
   Using a clutch hub holding tool, thread the tool into the clutch hub center. Turn the tool to pull the clutch hub, pulley bearing, and shim assembly straight off the compressor shaft. Note the position and thickness of any shims behind the hub for air gap reference.
6. 6

   Remove clutch coil
   Remove the single bolt securing the clutch coil to the compressor front housing. Carefully slide the coil assembly forward off the compressor. Inspect coil wiring for damage or wear.
7. 7

   Remove pulley and bearing assembly
   If pulley bearing is damaged or noisy, remove the retaining snap ring from the compressor nose and pull the pulley assembly forward off the bearing. Note bearing orientation for correct installation of new assembly.
8. 8

   Clean and inspect compressor mounting surfaces
   Clean the compressor shaft, nose housing, and all mounting surfaces with lint-free shop towels. Inspect shaft for scoring, burrs, or damage. Remove any debris or old lubricant. Check that shaft rotates freely by hand.
9. 9

   Install new clutch coil
   Apply a thin film of clean PAG oil to the compressor nose housing. Slide new clutch coil onto housing ensuring alignment with mounting hole. Install retaining bolt and tighten securely. Do not over-tighten small mounting bolt.
10. 10

    Install new pulley and clutch hub assembly
    If pulley was removed, install new pulley bearing assembly with snap ring. Slide new clutch hub assembly onto compressor shaft with appropriate shim(s) behind it. Install snap ring into shaft groove ensuring it fully seats in the groove.
11. 11

    Check and adjust clutch air gap
    Using feeler gauge, measure air gap between clutch hub face and pulley face at three points around circumference. Gap should be 0.35-0.50mm (0.014-0.020 inches). Add or remove shims as needed to achieve proper gap. This is critical for clutch engagement and longevity.
    ℹ️Incorrect air gap will cause clutch slipping, noise, or premature failure. Take time to measure accurately at multiple points.
12. 12

    Install new AC line O-rings
    Install new O-rings onto both AC line fittings. Coat O-rings lightly with clean PAG oil (ND-11). Add approximately 30ml of fresh PAG oil into the compressor suction port to replace oil lost during service.
    Torque spec

    AC Line Fittings20 Nm (15 lb-ft)
13. 13

    Reconnect AC lines and electrical connector
    Thread AC line fittings into compressor ports by hand until finger tight. Torque fittings to specification using two wrenches to prevent component twisting. Reconnect clutch coil electrical connector ensuring it clicks into place.
    Torque spec

    AC Line Fittings20 Nm (15 lb-ft)
14. 14

    Reinstall serpentine belt
    Route serpentine belt around all pulleys per routing diagram. Rotate tensioner counterclockwise and slip belt onto last pulley. Release tensioner slowly. Verify belt is properly seated in all pulley grooves.
15. 15

    Evacuate and recharge AC system
    Reconnect battery. Using AC service equipment, evacuate system to 500 microns or less for minimum 30 minutes to remove all moisture. If system holds vacuum, recharge with R-1234yf refrigerant to factory specification (approximately 420-450g). Add any additional PAG oil per manufacturer specifications if needed based on oil drained during recovery.

Reassembly

1. Verify all AC line fittings are torqued to specification and show no signs of refrigerant leakage
2. Check that serpentine belt is properly seated and tensioned on all pulleys
3. Reinstall engine under cover with all fasteners secure
4. Reconnect negative battery terminal

Verification

• Start engine and set AC to maximum cold with blower on high
• Verify AC clutch engages smoothly with audible click when AC is turned on
• Check that clutch disengages properly when AC is turned off
• Listen for unusual noises from compressor area during operation
• Using AC manifold gauges, verify system pressures are within specification (typically 25-35 psi low side, 200-250 psi high side at idle with 95°F ambient)
• Check that vent temperature reaches 40-45°F within 5 minutes of operation
• Inspect all AC line connections for refrigerant leaks using electronic leak detector
• Verify no warning lights are illuminated on instrument cluster

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