Thermal Viscous Fan Clutch Direct Replacement for Isuzu NPR 4HF1 Truck 8-97088803-0

• OE Quality: Manufactured to Isuzu dimensional and thermal specifications for perfect fit and reliable cooling
• Automatic Temperature Regulation: Engages only when needed, preventing unnecessary fan drag
• Reduces Fuel Consumption: Disengaged clutch reduces parasitic engine load, saving fuel
• Lowers Noise Levels: Fan spins slowly when cold, reducing cabin and exterior noise
• Prevents Overheating: Provides full fan speed when engine reaches high temperatures
• Durable Silicone Fluid: Long-lasting viscosity characteristics for consistent performance
• Precision Thermostatic Spring: Responds accurately to radiator outlet air temperature
• Restores Cooling System Performance: Eliminates overheating, roaring fan, or poor A/C function
• Direct Replacement: Simple bolt-on installation with proper tools
• Cost-Effective: Affordable alternative to genuine OEM fan clutches

This fan clutch is specifically designed for Isuzu NPR trucks with 4HF1 engine.

• ISUZU NPR (NPR59, NPR66, NPR70, NPR71, NPR75, etc. with 4HF1)
• May also fit other Isuzu medium trucks with 4HF1 - verify compatibility

• 4-Cylinder, Inline Diesel, Direct Injection
• Displacement: 3.9L (3856cc)

1. Disconnect battery negative cable
2. Remove the cooling fan blades from the old clutch (often held by bolts or nuts)
3. Remove the old fan clutch from the water pump hub (typically left-hand thread on the center nut - turn clockwise to loosen)
4. Clean the water pump spindle threads
5. Apply anti-seize to threads (if recommended)
6. Install the new fan clutch onto the water pump. Tighten the center nut to specification (do not overtighten)
7. Reinstall the cooling fan blades onto the new clutch. Torque fan bolts evenly (8-12 Nm)
8. Reconnect battery
9. Start engine and check for wobble or noise. Listen for clutch engagement as engine warms up

• Fluid Fill Check: Ensures correct silicone oil quantity and viscosity
• Temperature Response Test: Clutch engaged/disengaged at specified temperatures (bench test)
• Leak Test: Seal integrity verified to prevent silicone fluid leakage
• Bearing Noise Test: Rotated to check for smooth, quiet operation
• Dimensional Inspection: Mounting flange, thread size, and bolt pattern verified
• Visual Inspection: 100% checked for casting defects or damaged threads
• ISO/TS16949 Certified: Manufactured under strict quality management systems
• Packaged Safely: Sealed in plastic bag, boxed with foam

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea