85°C Opening Temperature Thermostat for Isuzu 4HK1 Engine with OEM Standard Fitment and Precision Wax Element
A precision wax-element thermostat that regulates engine coolant flow to maintain optimal operating temperature (85°C). Prevents overheating, ensures fast warm-up, and protects the engine from thermal stress in commercial applications.
OEM Numbers: 8-97300787-0 / 8973007870
Primary Application: ISUZU 4HK1 5.2L turbo diesel engine
Compatible Engines: 4HF1, 4HG1, 4HE1, 4JJ1, and 6HK1
| Part Number | 8-97300787-0 8973007870 |
| Product Name | Thermostat |
| Car Model | Isuzu NPR 700P |
| Engine Model | Isuzu 4HK1 |
| Condition | 100% Brand New |
| Material | High-strength aluminum alloy & precision bearings |
| Cooling Type | Engine coolant circulation |
| Installation | Direct OEM replacement |
| Quality Standard | OEM equivalent / ISO quality control |
Primary Fitment - ISUZU N-Series / ELF Medium-Duty Trucks:
| Chassis / Model | Engine | Years / Notes |
|---|---|---|
| ISUZU NPR, NPR-HD, NPR66, NPR70, NPR71 | 4HK1 (5.2L), 4HE1 (4.8L), 4HF1 (4.3L), 4HG1 (4.6L) | 1998-2016 - primary fitment for 4HK1 |
| ISUZU NQR / NQR75 | 4HK1 (5.2L), 4HE1-XS | 2004-2016 |
| ISUZU NRR | 4HK1 (5.2L) | 2004-2016 |
| ISUZU 700P | 4HK1 (5.2L), 4HF1, 4HE1 | 2005-2016 |
Industrial & Off-Highway Equipment:
| Brand | Model / Series | Engine |
|---|---|---|
| Hitachi | ZX200-3, ZX210-3, ZX240-3, ZX270-3, ZX330-3, ZX350-3 | 4HK1, 6HK1 |
| Case | CX210B, CX210C, CX230B, CX330C | 4HK1, 6HK1 |
| Kobelco | SK series | 4HK1 |
- OE Quality: Manufactured to strict ISUZU OEM dimensional and material standards for perfect direct-fit replacement
- Precision Wax Element: Copper capsule expands at controlled rate for consistent opening characteristics
- Critical Engine Protector: Prevents overheating that can cause cylinder head warping and catastrophic engine damage
- Restores Fuel Economy: Correct warm-up performance saves up to 15% fuel in cold conditions
- Ensures Cab Heating & Defrosting: Restores full heat output for driver comfort and safety
- Prevents Sludge Formation: Maintains proper oil temperature to extend engine life
- 100% Factory-Tested: Validated for correct opening temperature and leak-free sealing
- Long Service Life: Designed for 500,000+ km of heavy-duty commercial operation
- Material Verification: Brass/copper composition tested to JIS/SAE durability standards
- Opening Temperature Calibration: 100% sample-tested at 85°C ±2°C
- Valve Lift Test: Travel verified to OE specification (minimum 8 mm at full open)
- Leak Testing: Each unit 100% pressure-tested for zero leakage
- Thermal Cycle Endurance: Sample units subjected to 50,000+ open/close cycles
- ISO 9001:2015 / IATF 16949 Certified: Facility meets international automotive quality standards
- Individual Packaging: Sealed in moisture-barrier VCI bag with OE-style labeling
- Wholesale/Bulk Orders: Available in case packs (10, 20, 50, 100 units)
- Customization: Private-label retail packaging available for volume orders
- Fast Shipping: Ready stock for immediate dispatch worldwide
- Wholesale Support: Long-term supply agreements and tiered commercial pricing
For pricing, availability, or bulk purchase of the ISUZU Thermostat 8-97300787-0 (8973007870), please contact our sales team for a competitive wholesale quote and expert technical support.
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