Thermostat Hose 8-97209949-0 8972099490 For ISUZU NPR NQR 4HF1 4HG1 — OEM Verified Direct Fit, Reinforced Rubber Coolant Hose
Basic Properties
Place of Origin:
China
Brand Name:
YIMI
Certification:
ISO/TS16949
Model Number:
ISUZU NPR NQR 4HF1 4HG1
Trading Properties
Minimum Order Quantity:
20 pcs
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| OEM Part Number: | 8-97209949-0 / 8972099490 | Part Name: | Thermostat Hose / Water Bypass Hose |
| Engine Compatibility: | ISUZU 4HF1 (4.3L), 4HG1 (4.6L), 4HK1 (5.2L) | Vehicle Models: | ISUZU NPR, NQR, NKR, ELF, NPR75, NQR75 |
| Material: | Heat-resistant Reinforced Rubber | Function: | Transfers Coolant Between Thermostat Housing, Water Pump, And Engine |
| Resistance: | Heat, Pressure, Coolant Corrosion, Vibration | Country of Origin: | Japan (OEM) / China (aftermarket Replacement) |
| Packaging: | Neutral Packaging / Custom Packaging Available | Condition: | Brand New — 100% Quality Inspected |
| Warranty: | 6–12 Months | ||
| High Light: | ISUZU NPR thermostat hose OEM,reinforced rubber coolant hose,4HF1 4HG1 direct fit hose |
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Product Description
Thermostat Hose 8-97209949-0 8972099490 For ISUZU NPR NQR 4HF1 4HG1
OEM Verified Direct Fit, Reinforced Rubber Coolant Hose
Product Overview
The Thermostat Hose with OEM numbers 8-97209949-0 / 8972099490 is a verified direct-fit replacement for ISUZU NPR, NQR, NKR, and ELF series trucks equipped with the 4HF1 (4.3L) and 4HG1 (4.6L) diesel engines. This critical cooling system component channels coolant between the thermostat housing, water pump, and engine block to maintain proper operating temperature and prevent overheating.
- Material & Construction: Heat-resistant, reinforced rubber designed to withstand high-temperature coolant circulation, pressure pulsation, and vibration
- Temperature & Pressure Resistance: Engineered for stable performance in continuous high-temperature operation
- Dimensional & Fitment Verification: Direct OEM-equivalent replacement with matching bends, end diameters, and length
- OEM Cross-Reference Verified: Primary part number 8-97209949-0 / 8972099490, compatible with 8-97209949-1 / 8972099491
- Multi-Platform Application: Compatible with ISUZU NPR, NQR, NKR, ELF, NPR75/NQR75 platforms and Hitachi excavators with ISUZU 4HK1 engines
Failure Symptoms & Replacement Indicators
- Coolant leaks: Visible drips or puddles under the vehicle, low coolant levels requiring frequent top-ups
- Engine overheating: Temperature gauge rising above normal operating range
- Cracked, spongy, or hardened hose: Visual inspection reveals degradation, swelling, or stiffness
- Coolant residue or white staining: Dried coolant traces around hose connections
- Loose or brittle hose clamps: Clamps that no longer hold tension
| Part Number: | 8-97209949-0 8972099490 | Product Name: | Thermostat Hose |
| Car Model: | ISUZU NPR NQR | Engine Model: | ISUZU 4HF1 4HG1 |
| Condition: | 100% Brand New | Origin: | China Mainland |
| Main Market: | Middle East, Asia, Africa, South America, North America & Europe | ||
Vehicle & Engine Compatibility
| Brand | Model / Series | Engine | Years |
|---|---|---|---|
| ISUZU | NPR | 4HF1 / 4HG1 | 1999-2016 |
| ISUZU | NQR | 4HF1 / 4HG1 | 1997-2016 |
| ISUZU | NKR | 4HF1 / 4HG1 | -- |
| ISUZU | ELF | 4HK1 | -- |
| ISUZU | NPR75 | 4HK1 | -- |
| ISUZU | NQR75 | 4HK1 | -- |
| Hitachi | Excavators / Bulldozers | 4HK1 | -- |
Important Fitment Notes:
- This hose is used across multiple ISUZU engine platforms including 4HF1, 4HG1, and 4HK1
- Verify hose routing and bends against original component
- Always inspect thermostat, water pump, and radiator hoses when replacing
- Verify OEM number against engine tag or vehicle documentation before ordering
Features & Benefits
Heat-resistant reinforced rubber
Withstands continuous high-temperature coolant circulation
Withstands continuous high-temperature coolant circulation
Pressure-pulsation resistant construction
Prevents hose expansion and cracking under pressure cycles
Prevents hose expansion and cracking under pressure cycles
Coolant corrosion resistance
Resists chemical degradation from ethylene glycol coolants
Resists chemical degradation from ethylene glycol coolants
Vibration-resistant design
Maintains integrity under continuous engine vibration
Maintains integrity under continuous engine vibration
Direct OEM-equivalent fitment
Matches factory bends, end diameters, and length
Matches factory bends, end diameters, and length
Multi-platform compatibility
One hose covers multiple ISUZU and Hitachi applications
One hose covers multiple ISUZU and Hitachi applications
Quality Control & Verification
| QC Item | Verification Method |
|---|---|
| Inner diameter / outer diameter | Precision gauge measurement against OEM drawing |
| Hose length / bend geometry | Dimensional inspection |
| Material hardness | Shore A durometer testing |
| Burst pressure resistance | Hydrostatic pressure test |
| Temperature cycling | Thermal cycle testing |
| Coolant chemical resistance | Immersion test in coolant solution |
| Surface finish & visual defects | Visual inspection for cracks, blisters, or contamination |
Each unit undergoes 100% quality inspection before packaging. Manufactured to meet ISUZU OEM specification standards.
Installation & Maintenance
IMPORTANT: Allow the engine to cool completely before removing radiator cap or cooling system components. Pressurized hot coolant can cause severe burns. Dispose of used coolant according to local environmental regulations.
Installation Guidelines:
- Drain coolant: Place drain pan under radiator, open drain cock, allow coolant to drain completely
- Remove old hose: Loosen hose clamps at both ends, twist hose to break seal, remove and inspect connections
- Clean mating surfaces: Wipe connection points clean, inspect for cracks or deformation
- Install new hose: Position new thermostat hose onto thermostat housing and water pump connections
- Secure clamps: Tighten hose clamps to specification without over-tightening
- Refill coolant: Refill with manufacturer-recommended coolant mixture, bleed system to remove air
- Pressure test: Run engine to operating temperature, check for leaks, verify thermostat operation
Maintenance Schedule:
- Inspect thermostat hose every 40,000-50,000 km or annually
- Replace immediately if hose shows cracking, swelling, hardening, or coolant weeping
- Replace coolant according to manufacturer's interval (typically every 2 years or 50,000 km)
- Inspect all cooling system hoses when replacing one hose
Packaging & Supply
- Standard packing: Neutral packaging in carton; custom packaging available for bulk orders
- Suitable for: Truck repair workshops, fleet maintenance departments, spare parts distributors, and export wholesalers
- Related parts available: Complete 4HF1/4HG1 cooling hose set, thermostat, water pump, and radiator cap
B2B Advantage: Stable supply, consistent quality, wholesale pricing available for fleet and distributor quantities.
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