A/C Compressor Clutch - Installation

A/C CLUTCH

NOTE: Typical A/C compressor and clutch assembly shown in illustrations.





1. Align the dowel pin on the back of the A/C clutch coil (2) with the hole in the front of the A/C compressor (3) and position the coil onto the compressor. Be certain that the A/C clutch coil wire lead is properly routed so that it is not pinched between the A/C compressor and the coil.

CAUTION: The A/C clutch coil retaining screws must be securely installed or they may vibrate out, resulting in a clutch failure and severe damage to the A/C compressor.

2. Install the three screws (1) that secure the A/C clutch coil to the front of the A/C compressor. Tighten the screws to 5 Nm (44 in. lbs.).






CAUTION: Be certain to position the A/C clutch coil wire lead so that it is not damaged during A/C compressor pulley and bearing installation.

CAUTION: When installing the pulley and bearing assembly, DO NOT mar the friction surfaces of the pulley or premature failure of the A/C clutch will result.

3. Install the pulley and bearing assembly (1) onto the front of the A/C compressor. If necessary, tap the pulley gently with a block of wood (2) placed on the pulley friction surface.






CAUTION: The snap ring must be fully and properly seated in the groove or it will vibrate out, resulting in a clutch failure and severe damage to the A/C compressor.

NOTE: A new snap ring must be used to secure the pulley and bearing assembly to the A/C compressor. The bevel side of the snap ring must face outward.

4. Using A/C Snap Ring Pliers 9764 (1) or equivalent, install the snap ring (2) that secures the pulley and bearing assembly (3) to the front of the A/C compressor (4). Be certain that the snap ring is fully and properly seated in the groove.





5. If the original clutch plate (2) and pulley and bearing assembly are to be reused, reinstall the original shim(s) (3) onto the compressor shaft (1). If a new clutch plate and pulley and bearing assembly are being used, install a trial stack of shims 1.50 mm (0.059 in.) thick onto the compressor shaft.





6. Install the clutch plate (4) onto the front of the A/C compressor (5).
7. Install the compressor shaft bolt (3). Tighten the bolt to 20 Nm (177 in. lbs.).

NOTE: The shims may compress after tightening the shaft bolt. Check the air gap in four or more places to verify the air gap is correct. Spin the pulley before performing a final check of the air gap.

NOTE: On models with the clutch plate recessed into the pulley, use a 90° wire gap gauge to measure the clutch air gap. On other models, use a blade type feeler gauge to measure the air gap.

8. With the clutch plate assembled tight against the shim(s), measure the air gap between the clutch plate and the pulley and bearing assembly. The air gap should be between 0.30 - 0.60 mm (0.012 - 0.024 in.). If the air gap is not between specifications, add or subtract shims as needed until the correct air gap is obtained.

CAUTION: Be certain that the A/C clutch coil wire harness is properly routed so that it is not pinched between the A/C compressor and the coil connector bracket.

9. Carefully route the A/C clutch coil wire lead and install the connector bracket (2) and retaining screw onto the A/C compressor. Tighten the screw to 4.3 Nm (38 in. lbs.).
10. Connect the engine wire harness to the A/C clutch coil connector.
11. Install the accessory drive belt Serpentine Accessory Drive Belt - Installation.
12. On 2.8L equipped models, install the air cleaner housing Air Cleaner Body - Installation.
13. On 3.8L equipped models, install the coolant recovery container Coolant Recovery Bottle - Installation.
14. Reconnect the negative battery cable.