AC Compressor Clutch

This procedure covers the replacement of the AC compressor clutch assembly on the 2018-2024 Honda Accord 1.5L Turbo, including refrigerant recovery, clutch removal, and system recharge.

Warnings

Tools required

Parts

• AC compressor clutch assembly × 1 — Use OEM specification for 1.5T engine
• AC line O-rings × 1 — Use OEM specification
• Snap ring (if damaged) × 1 — Use OEM specification
• Compressor pulley bearing (if worn) × 1 — Use OEM specification

Fluids

• PAG 46 refrigerant oil — 0.25 qt
• R1234yf refrigerant (or R134a depending on model year)

Preparation

1. Verify refrigerant type using identifier tool or service records
2. Ensure engine is completely cool to the touch
3. Disconnect negative battery terminal and wait 3 minutes for system discharge
4. Raise vehicle and secure on jack stands, apply wheel chocks to rear wheels
5. Remove passenger front wheel and inner fender splash shield for improved access
6. Recover AC refrigerant using certified equipment and record amount removed
7. Measure and record PAG oil recovered during refrigerant recovery process

Procedure

1. 1

   Disconnect AC line from compressor
   Locate the AC line fitting on the rear of the compressor. Remove the bolt securing the line to the compressor using appropriate socket. Immediately cap both the line and compressor ports to prevent contamination and moisture entry. Discard old O-rings.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
2. 2

   Remove serpentine belt
   Locate the belt tensioner on the passenger side of the engine. Using a breaker bar or serpentine belt tool, rotate tensioner counterclockwise to release tension. Slip belt off compressor pulley first, then remove from other pulleys. Inspect belt for wear and replace if necessary.
3. 3

   Remove compressor electrical connector
   Locate the electrical connector on the front of the compressor clutch assembly. Press the locking tab and disconnect the clutch field coil connector. Move wiring harness aside to prevent damage during clutch removal.
4. 4

   Remove clutch hub snap ring
   Using snap ring pliers, carefully remove the snap ring retaining the clutch hub to the compressor shaft. Work carefully to avoid bending or damaging the snap ring. Set snap ring aside for inspection - replace if deformed or damaged.
5. 5

   Remove clutch hub assembly
   Install clutch puller tool onto the clutch hub threads per tool manufacturer instructions. Tighten puller evenly to extract clutch hub from compressor shaft. Do not strike or hammer the assembly. If hub is seized, apply penetrating oil and allow to soak for 15 minutes before attempting removal again.
6. 6

   Remove pulley and bearing assembly
   Remove the bolts securing the pulley and bearing assembly to the compressor front housing (typically 3 or 4 bolts in a circular pattern). Carefully pull pulley assembly forward off the compressor. Inspect bearing for roughness or noise by spinning by hand - replace if worn.
7. 7

   Remove field coil assembly
   Remove the retaining screws or bolts holding the electromagnetic field coil to the compressor front housing. Carefully extract field coil, noting wire routing for reinstallation. Inspect coil terminals and wiring for damage or corrosion.
8. 8

   Clean compressor shaft and surfaces
   Thoroughly clean the compressor shaft, front housing mounting surface, and all mating surfaces using lint-free cloth and AC-safe solvent. Remove all old oil, dirt, and debris. Inspect shaft for scoring or damage - minor imperfections can be addressed with fine emery cloth.
9. 9

   Install new field coil assembly
   Position new field coil onto compressor front housing, aligning wire routing with original path. Install retaining screws or bolts and tighten in a cross pattern. Verify field coil sits flush against housing with no gaps.
10. 10

    Install pulley and bearing assembly
    If bearing was replaced, ensure it is properly pressed into pulley housing. Position pulley assembly onto compressor front housing, aligning bolt holes. Install and hand-tighten bolts in cross pattern, then torque to specification. Verify pulley rotates freely without binding.
11. 11

    Install new clutch hub
    Apply thin film of refrigerant oil to compressor shaft. Using clutch installation tool, carefully drive new clutch hub onto shaft until fully seated. Ensure hub slides on smoothly - excessive force indicates misalignment. Measure clutch air gap with feeler gauge - should be 0.35-0.50mm (0.014-0.020 inches). Adjust shims if necessary.
12. 12

    Install snap ring and verify assembly
    Install new or inspected snap ring into groove on compressor shaft using snap ring pliers. Ensure snap ring is fully seated in groove around entire circumference. Attempt to pull clutch hub - it should not move. Rotate pulley by hand to verify smooth operation without interference.
13. 13

    Reconnect electrical connector and reinstall belt
    Connect clutch field coil electrical connector until locking tab clicks into place. Route serpentine belt per underhood routing diagram, ensuring proper engagement on all pulleys. Release tensioner to apply proper belt tension. Verify belt alignment on all pulleys.
14. 14

    Reconnect AC lines with new O-rings
    Install new O-rings onto AC line fitting, lubricating with appropriate PAG oil. Connect AC line to compressor and install retaining bolt. Torque to specification using torque wrench. Add the measured amount of PAG oil that was removed during recovery, plus any additional oil as specified by clutch manufacturer (typically 1-2 oz for clutch replacement).
    Torque spec

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

    Evacuate and recharge AC system
    Using AC service machine, evacuate system to 500 microns or lower for minimum 30 minutes to remove all moisture and air. Verify system holds vacuum for 10 minutes without decay. Recharge system with refrigerant to factory specification (verify on underhood label). Add total PAG oil as calculated from recovery plus component replacement.

Reassembly

1. Reinstall inner fender splash shield and secure all fasteners
2. Reinstall passenger front wheel and torque lug nuts to specification
3. Lower vehicle and remove jack stands
4. Reconnect negative battery terminal
5. Start engine and verify no unusual noises from compressor area

Verification

• Start engine and turn AC to maximum cold with fan on high
• Verify compressor clutch engages with audible click when AC is activated
• Check for proper cooling - vent temperature should reach 38-42°F within 5 minutes
• Inspect all AC line connections for refrigerant leaks using leak detector
• Verify clutch disengages smoothly when AC is turned off
• Check serpentine belt alignment and tension - belt should not slip or squeal
• Monitor AC system operation for 10-15 minutes to ensure consistent cooling and clutch cycling
• Verify no abnormal noises from compressor pulley or bearing during operation

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