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{"title":"NPR 700P 4HK1 TURBO CHARGE 8980000311 8970786400","imgUrl":"https:\/\/img.chinax.com\/nimg\/bf\/e4\/ab2ffd604bc21336062bab1561b6-200x200-1\/npr_700p_4hk1_turbo_charge_8980000311_8970786400.jpg","attrs":{"Model Number":"NPR 700P 4HK1","Place of Origin":"China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
{"title":"NPR 4BD2 3.9L CYLINDER HEAD 8971030270","imgUrl":"https:\/\/img.chinax.com\/nimg\/c0\/a8\/bc770a27bfb7fb839df3007b51a1-200x200-1\/npr_4bd2_3_9l_cylinder_head_8971030270.jpg","attrs":{"Model Number":"NPR 4BD2","Place of Origin":"China","Minimum Order Quantity":"5 PCS","Supply Ability":"10000pcs\/month"}}
Engine Water Pipe Hose 8-97160257-1 8971602570 For ISUZU NPR NQR NPR-HD 4HE1 4.8L — OEM Upper Radiator Inlet Hose, Verified Direct Fit, EPDM Rubber Coolant Hose
Product Overview
The Engine Water Pipe Hose with OEM numbers 8-97160257-1 / 8971602570 is a verified direct-fit upper radiator inlet hose for ISUZU NPR, NPR-HD, and NQR series trucks equipped with the 4HE1 4.8L diesel engine (1998-2004). This critical engine cooling system component channels coolant from the radiator to the engine to maintain proper operating temperature and prevent overheating.
Material & Construction: EPDM rubber with knitted rayon reinforced inner base tube for maximum strength and burst resistance
Temperature Rating: -40°F to +275°F (-40°C to +135°C) in coolant hose applications
Dimensional Verification: Centerline length 533 mm (21 in), Inside Diameter 1: 34 mm (1.33 in), Inside Diameter 2: 1 7/16 in
Installation Success Rate: Direct bolt-on fitment with factory clamps and connections
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
Product Specifications
Part Number:
8-97160257-1 8971602570
Product Name:
Engine Water Pipe Hose
Car Model:
ISUZU NPR NQR NPR-HD
Engine Model:
ISUZU 4HE1
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
4HE1 4.8L
1998-2004
ISUZU
NPR-HD
4HE1 4.8L
1998-2004
ISUZU
NQR
4HE1 4.8L
1998-2004
ISUZU
NRR
4HE1 4.8L
1998-2004
Chevrolet
W-Series
4HE1 4.8L
1999-2010
GMC
W-Series
4HE1 4.8L
1999-2010
Important Fitment Notes: This hose is specifically designed for the 4HE1 4.8L diesel engine platform. Confirm the hose position as the upper radiator inlet hose (radiator to engine). Always verify OEM number against the engine tag or vehicle documentation before ordering.
Features & Benefits
EPDM rubber construction
Resistant to oil, mud, salt, road debris, ozone, and coolant degradation
Knitted rayon reinforced inner base tube
Provides maximum strength and burst resistance under high-pressure coolant circulation
SAE J1684 Type EC compliance
Eliminates premature deterioration caused by electro-chemical degradation
Temperature range -40°F to +275°F
Performs reliably across extreme temperature swings from cold-start to heavy-duty operation
Precision-molded fitment
Direct replacement for factory-installed hose with precise fit and durability
533 mm centerline length
Matches OEM routing to prevent kinks, chafing, or interference with engine components
Quality Control & Verification
QC Item
Verification Method
Inner diameter / outer diameter
Precision gauge measurement against OEM drawing
Centerline length
Dimensional inspection
Material hardness
Shore A durometer testing
Burst pressure resistance
Hydrostatic pressure test
Temperature cycling
Thermal cycle testing (-40°C to +135°C)
Electro-chemical degradation resistance
SAE J1684 Type EC verification
Surface finish & visual defects
Visual inspection for cracks, blisters, or contamination
Manufacturing conforms to SAE J20R3, Class D-1 and SAE J1684 Type EC standards for automotive coolant hose applications.
Installation & Maintenance Recommendations
IMPORTANT: Allow the engine to cool completely before removing the radiator cap or any cooling system components. Pressurized hot coolant can cause severe burns. Dispose of used coolant in accordance with local environmental regulations.
Installation Guidelines
Drain coolant: Place a drain pan under the radiator, open the drain cock, and allow coolant to drain completely
Remove old hose: Loosen the hose clamps at both ends, twist the hose to break the seal, and remove it
Clean mating surfaces: Wipe both connection points clean and inspect for cracks, pitting, or deformation
Install new hose: Position the new upper radiator inlet hose onto the radiator outlet and engine inlet
Secure clamps: Tighten hose clamps to specification without over-tightening
Refill coolant: Refill with manufacturer-recommended coolant mixture and bleed the cooling system
Pressure test: Run the engine to operating temperature and check for leaks
Maintenance Schedule
Inspect the upper radiator hose at every 40,000-50,000 km or annually
Replace immediately if the hose shows signs of cracking, swelling, hardening, or coolant weeping
Replace coolant according to manufacturer's interval (typically every 2 years or 50,000 km)
When replacing one hose, consider inspecting the lower radiator hose, bypass hose, and heater hoses
Packaging & Supply
Standard packing: Plastic bag with neutral packaging; color box or customer-branded packaging available for bulk orders
Suitable for: Engine rebuild workshops, fleet maintenance departments, spare parts distributors, and export wholesalers
Related parts available: Complete 4HE1 cooling hose set (inlet + outlet + bypass), radiator cap, thermostat, water pump
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 ...
