Thermal Viscous Fan Clutch Direct Replacement for Isuzu NPR 4HF1 Diesel Engine
| Part Number: | 8-97088803-0, 8970888030 | Engine Model: | ISUZU 4HF1 (3.9L Diesel) |
| Type: | Thermal Viscous (silicone Fluid + Bi-metallic Spring) | Engagement Temperature: | 75-85°C (radiator Outlet Air) |
| Material: | Aluminum Housing, Sealed Bearing | Mounting: | Bolts To Water Pump Hub (4 Bolts Typical) |
| Displacement: | 3.9L (3856cc) | Cooling Type: | Engine Coolant Circulation |
| High Light: | Thermal viscous fan clutch for Isuzu NPR,Isuzu 4HF1 diesel engine fan clutch,Direct replacement fan clutch with warranty |
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| Part Numbers | 8-97088803-0, 8970888030 |
| Product Name | Fan Clutch / Viscous Fan Clutch / Fan Coupling |
| Car Model | ISUZU NPR |
| Engine Model | ISUZU 4HF1 (3.9L Diesel) |
| Condition | 100% Brand New |
| Material | High-strength aluminum alloy & precision bearings |
| Warranty | 6 Months |
| Origin | China Mainland |
- OE Quality: Manufactured to Isuzu 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
- Direct Replacement: Simple bolt-on installation with proper tools
- Cost-Effective: Affordable alternative to genuine OEM fan clutches
- Disconnect battery negative cable
- Remove cooling fan blades from old clutch (bolts or nuts)
- Remove old fan clutch from water pump hub (typically left-hand thread - turn clockwise to loosen)
- Clean water pump spindle threads
- Apply anti-seize to threads if recommended
- Install new fan clutch onto water pump and tighten center nut to specification
- Reinstall cooling fan blades onto new clutch and torque fan bolts evenly (8-12 Nm)
- Reconnect battery
- 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
- 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
- Packaged Safely: Sealed in plastic bag, boxed with foam
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