Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2008FX45 AWD V8-4.5L (VK45DE)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCOMPRESSOR HVACCOMPRESSOR CLUTCHSERVICE AND REPAIR
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)
Compressor Clutch: Service and Repair
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)SECTION Service and Repair
Removal and Installation of Compressor Clutch
REMOVAL
Overhaul
1. When removing center bolt, hold clutch disc with a clutch disc wrench (SST).
2. Remove clutch disc using a clutch disc puller (SST).
3. Remove snap ring using external snap ring pliers.
4. Position center pulley puller on the end of drive shaft, and remove pulley assembly using any commercially available pulley puller.
To prevent pulley groove from being deformed, puller claws should be positioned into the edge of pulley assembly.
5. Remove field coil harness clip using a pair of pliers.
6. Remove snap ring using external snap ring pliers.
Inspection
Clutch disc
If the contact surface shows signs of damage due to excessive heat, replace clutch disc and pulley.
Pulley
Check appearance of pulley assembly. If contact surface of pulley shows signs of excessive grooving, replace clutch disc and pulley.
Contact surfaces of pulley assembly should be cleaned with a suitable solvent before reinstallation.
Coil
Check coil for loose connection or cracked insulation.
INSTALLATION
1. Install field coil.
Be sure to align coil's pin with hole in compressor's front head.
2. Install field coil harness clip using a screwdriver.
3. Install pulley assembly using pulley installer (SST) and a hand press, and then install snap ring using snap ring pliers.
4. Install clutch disc on drive shaft, together with original shim(s).
Press clutch disc down by hand.
5. Using holder to prevent clutch disc rotation.
Torque : 14 N.m (1.4 kg-m, 10 ft-lb)
After tightening bolt, make sure pulley rotates smoothly.
6. Check clearance around entire periphery of clutch disc.
Disc to pulley clearance : 0.25 - 0.6 mm (0.010 - 0.024 in)
If specified clearance is not obtained, replace adjusting spacer and readjust.
Break-in Operation
When replacing compressor clutch assembly, always carry out break-in operation. This is done by engaging and disengaging clutch about thirty-times. Break-in operation raises the level of transmitted torque.
REMOVAL
Overhaul
1. When removing center bolt, hold clutch disc with a clutch disc wrench (SST).
2. Remove clutch disc using a clutch disc puller (SST).
3. Remove snap ring using external snap ring pliers.
4. Position center pulley puller on the end of drive shaft, and remove pulley assembly using any commercially available pulley puller.
To prevent pulley groove from being deformed, puller claws should be positioned into the edge of pulley assembly.
5. Remove field coil harness clip using a pair of pliers.
6. Remove snap ring using external snap ring pliers.
Inspection
Clutch disc
If the contact surface shows signs of damage due to excessive heat, replace clutch disc and pulley.
Pulley
Check appearance of pulley assembly. If contact surface of pulley shows signs of excessive grooving, replace clutch disc and pulley.
Contact surfaces of pulley assembly should be cleaned with a suitable solvent before reinstallation.
Coil
Check coil for loose connection or cracked insulation.
INSTALLATION
1. Install field coil.
Be sure to align coil's pin with hole in compressor's front head.
2. Install field coil harness clip using a screwdriver.
3. Install pulley assembly using pulley installer (SST) and a hand press, and then install snap ring using snap ring pliers.
4. Install clutch disc on drive shaft, together with original shim(s).
Press clutch disc down by hand.
5. Using holder to prevent clutch disc rotation.
Torque : 14 N.m (1.4 kg-m, 10 ft-lb)
After tightening bolt, make sure pulley rotates smoothly.
6. Check clearance around entire periphery of clutch disc.
Disc to pulley clearance : 0.25 - 0.6 mm (0.010 - 0.024 in)
If specified clearance is not obtained, replace adjusting spacer and readjust.
Break-in Operation
When replacing compressor clutch assembly, always carry out break-in operation. This is done by engaging and disengaging clutch about thirty-times. Break-in operation raises the level of transmitted torque.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.