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ISUZU Fan Clutch 8-97088803-0 8970888030 for NPR 4HF1 — Silicone Oil Type OEM Standard
Product Overview
The ISUZU Fan Clutch with OEM numbers 8-97088803-0 / 8970888030 is a precision-engineered replacement designed for ISUZU NPR series trucks, compatible with 4HF1 diesel engines. This component is a core part of the engine cooling system, responsible for automatically regulating fan speed based on engine temperature.
Numbering Note: This product number is 8-97088803-0 / 8970888030. It is supplied by the IZUMI brand.
Working Principle
This is a thermal silicone oil type fan clutch (Silicone Oil Fan Coupling). Its working principle includes:
Temperature Sensing: A bimetallic temperature-sensing spring detects the hot airflow from the radiator core.
Automatic Regulation: When engine temperature rises, the sensing spring actuates a valve, allowing high-viscosity silicone oil into the working chamber. The oil's shear viscosity transmits torque to drive the fan at high speed for increased cooling airflow.
Energy Saving & Noise Reduction: When temperature drops, the oil returns to the reservoir, reducing fan speed to minimize power loss and noise.
Failure Symptoms
⚠️ Inspect immediately if any of these occur:
Symptom
Probable Cause
Persistent high engine temperature, especially under load
Silicone oil leakage or degradation; insufficient fan speed
Loud roaring noise at cold start that persists
Valve spool stuck in "full engagement" position
Rapid temperature rise at idle with A/C on
Insufficient low-speed engagement torque
Fan wobble or bearing noise
Worn front bearing
Reduced engine power or increased fuel consumption
Semi-engaged clutch causing constant fan drag
Product Specifiions
Part Number:
8-97088803-0 8970888030
Product Name:
Clutch Release Bearing
Car Model:
NPR
Engine Model:
4HF1
Condition:
100% Brand New
Size:
Standard
Weight:
Standard
Origin:
China Mainland
Main Market:
Middle East, Asia, Africa, South America, North America & Europe
Package:
Neutral Packing Or Make It As Requested
Material:
High-strength aluminum alloy & precision bearings
Cooling Type:
Engine coolant circulation
Installation:
Direct OEM replacement
Quality Standard:
OEM equivalent / ISO quality control
Verifiable Data
Product Certifiion: Manufactured under ISO/TS16949 automotive quality management system certifiion.
Brand Background: Supplied by IZUMI brand with 18 years of experience in the automotive parts industry.
Compatible Model: ISUZU NPR (1999–2019).
Compatible Engine: ISUZU 4HF1.
Condition:Brand New — 100% quality inspected.
Supply Capacity:1000 pieces/month.
Delivery Time:5–8 working days.
Warranty: Per supplier policy (typically 6–12 months).
Number Confirmation: This product number is 8-97088803-0 / 8970888030. Verify the specific number on the original part before ordering.
Professional Installation: The fan clutch is a critical engine cooling system component — improper installation may cause engine overheating. Professional installation is recommended.
Associated Components: When replacing the fan clutch, it is recommended to inspect the fan blade, belt, and cooling system — replace if necessary.
Features & Benefits
ISO/TS16949 Quality Management Certified
Internationally recognized automotive industry quality standard — ensures full-process quality control.
18 Years Industry Experience (IZUMI Brand)
Mature production systems and extensive industry experience — provides reliable, high-quality automotive parts solutions.
Precision Thermal Silicone Oil Control
Accurately regulates fan speed based on engine temperature for optimal cooling — effectively prevents overheating and extends engine life.
Fuel-Efficient Design
Engages the fan only when necessary, reducing parasitic power loss — significantly improves fuel economy.
Broad OEM Cross-Compatibility
Replaces OEM numbers 8-97088803-0 / 8970888030; compatible with ADZ991804, 8-97129738-0 — simplifies sourcing for repair shops.
Quality Control & Verifiion
QC Item
Inspection Method
Acceptance Criterion
Frequency
Sensing spring actuation temperature
Thermal response test rig
Standard temperature ± 2°C
100%
Silicone oil fill volume
Precision balance weighing
Nominal value ± 2g
100%
Torque transmission performance
Fan clutch dynamometer
Standard torque range
Batch sampling
Dynamic balance
Dynamic balancing machine
Per ISO 1940 standard
100%
High-pressure seal leak test
Compressed air + underwater test
No leakage
100%
Low-temperature startup
-30°C freezer soak test
Smooth rotation
Quarterly sampling
Visual inspection
Visual
No defects
100%
ISO/TS16949 quality audit
Third-party certifiion body
Per ISO/TS16949 standard
Periodic audit
Installation & Maintenance Recommendations
⚠️ IMPORTANT SAFETY NOTICE:
After engine shutdown, the cooling fan and clutch surface temperatures are extremely high. Allow the engine to cool completely (at least 30 minutes) before proceeding. Always wear protective gloves and safety glasses.
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
