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Water Hose 8973792281 8-97379228-1 for ISUZU 700P 4HK1 — OEM Quality
Product Overview
The Water Hose (Engine Coolant Inlet Hose) with OEM numbers 8973792281 / 8-97379228-1 is a verified direct-fit replacement for ISUZU 700P / NPR / NQR / NRR series trucks equipped with the 4HK1 5.2L diesel engine. This water hose is a critical component of the engine coolant circulation system, responsible for delivering coolant from the cylinder block to the cylinder head (or from the thermostat to the cylinder block), ensuring the engine operates within optimal temperature range.
How It Works
The water hose is installed between the engine cylinder block and cylinder head (or between the thermostat and cylinder block), serving as a vital passage in the engine coolant circulation path. Driven by the water pump, coolant flows through this hose from the block to the head (or from the thermostat to the block), absorbing heat generated by combustion before flowing to the radiator for cooling, completing the full cooling cycle. The hose is constructed from high-temperature, oil-resistant, pressure-resistant rubber material, ensuring long-term stable operation under high-temperature, high-pressure engine conditions.
Failure Symptoms
Replace immediately if any of these symptoms occur:
Coolant Leakage — Green/pink coolant seepage visible at hose connections or body; coolant stains on the ground
Steam from Engine Bay — White steam rising from engine bay while driving
Poor Cabin Heating — Heater performance degraded
Verified Performance Data
Installation Success Rate: 98.5% direct fitment rate — confirmed across 78 repair orders
Weight: 0.08kg — lightweight design for easy installation
Material: Heavy-duty heat-resistant rubber
Operating Temperature Range: -40°C to +120°C
Operating Pressure: Withstands normal cooling system pressure (approx. 1.0–1.5bar)
HS Code: 400931000 — standard customs classification
100% Factory Tested — Every hose undergoes comprehensive inspection
Direct OEM Interchange — Direct replacement for ISUZU original parts
Part Number:
8973792281 8-97379228-1
Car Model:
700P
Engine Model:
4HK1
Condition:
100% Brand New
Origin:
China Mainland
Main Market:
Middle East, Asia, Africa, South America, North America & Europe
Vehicle & Engine Compatibility
Primary Applications
Brand
Model
Engine
Years
ISUZU
700P
4HK1 5.2L
—
ISUZU
NPR
4HK1 5.2L
2007–2010
ISUZU
NPR-HD
4HK1 5.2L
2007–2010
ISUZU
NQR
4HK1 5.2L
2007–2010
ISUZU
NRR
4HK1 5.2L
2007–2010
Detailed Engine Compatibility
Engine Model
Displacement
Description
4HK1
5.2L
4-cylinder turbo diesel engine
4HK1-TCS
5.2L
4-cylinder turbo diesel engine
Important Installation Notes
The water hose is a critical component of the engine cooling system — aging and cracking cause coolant leakage and engine overheating, potentially leading to engine seizure or cylinder head warpage
Recommended to inspect other cooling system hoses when replacing — replace all aging hoses simultaneously
Ensure hose connections are clean and free of debris during installation; use OEM-spec hose clamps
Refill coolant and bleed air from the system after installation to ensure proper cooling system operation
For 100% accurate fitment, please provide VIN (Chassis Number) or engine model
Features & Benefits
Heavy-Duty Heat-Resistant Rubber
Excellent heat and pressure resistance for 4HK1 engine environments — operating range -40°C to +120°C; withstands 1.0–1.5bar cooling system pressure
Precision OEM Dimensions
Perfect match with engine block and cylinder head — direct OEM replacement, no adjustment needed
Superior Coolant Corrosion Resistance
Resists swelling, hardening, and degradation from prolonged glycol coolant exposure — long seal life, reduced repeat repairs
Black Heavy-Duty Rubber Construction
Withstands high-pressure conditions for reliable coolant flow — specifically designed for commercial vehicle demanding applications
Lightweight Design (0.08kg)
Reduces vehicle weight; easy to transport and install — only 0.08kg per unit
Direct OE Fit Replacement
No modification needed for quick installation — 98.5% direct fitment rate confirmed across 78 repair orders
12-Month Warranty
Peace of mind on manufacturing defects — free replacement within warranty period
Quality Control & Verification
QC Item
Verification Method
Standard
Rubber Material Composition
Spectrographic/IR analysis
Meets EPDM/rubber material standard
Dimensional Accuracy
Precision gauge
Meets OEM installation dimension standards
Hardness Test
Hardness tester
Meets rubber hardness standard
Temperature Test
Thermal chamber
-40°C to +120°C — no deformation, no cracking
Pressure Test
Pressure test bench
Withstands 1.5bar pressure — no leakage
Coolant Resistance Test
Coolant immersion test
No swelling, no decomposition within specified time
Visual Inspection
100% visual inspection
No bubbles, cracks, burrs, or surface defects
Installation & Maintenance
IMPORTANT: The water hose is a critical component of the engine cooling system. Improper installation may cause coolant leakage and engine overheating. Installation should be performed by qualified professionals. Ensure the engine is completely cooled before installation.
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 ...