Part Name: SCU Valve
Part No:4HK1 6HK1
Applicable Models: Isuzu NPR
Delivery Options : Express freight / Standard (sea) Freight
Condition/Options: New/ OEM replacement / Genuine original
Warranty : 6 months
MOQ : 1 Piece
Growshine Valve 4HK1 and 6HK1 for Isuzu NPR, NQR, and F-Series Trucks
Growshine International specializes in premium quality engine valves for Isuzu commercial vehicles, including Valve 4HK1 and Valve 6HK1 models designed for optimal performance in Isuzu NPR, NQR, and F-Series trucks.
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Product Overview
Growshine Valve 4HK1 and Valve 6HK1 are precision-engineered engine components designed specifically for Isuzu commercial vehicles. These valves are manufactured to exact OEM specifications to ensure optimal performance, fuel efficiency, and longevity in demanding operating conditions.
The 4HK1 engine is a 5.2L diesel powerplant commonly found in Isuzu NPR and NQR models, while the 6HK1 is a larger 7.8L engine used in Isuzu F-Series trucks. Both engines are known for their reliability and durability in commercial applications.
Compatible Isuzu Models
Isuzu NPR75 2005-2008 with 6 stud wheels
Isuzu NPR75 2008-2011 with 5 stud disc brakes
Isuzu NPS75 4X4 4WD 2005-2008 models
Isuzu F-Series FVR 18.5 ton trucks
Isuzu FVR 15 ton and 18.5 ton Euro 6 compliant models
Technical Specifications
The 6HK1 engine in Isuzu FVR 18.5 ton trucks features significantly upgraded performance with maximum horsepower increased to 275ps at 2,400rpm and torque improved to 100.1kgm at 1,450rpm :cite[1]:cite[5]. The engine can maintain 81.6kgm (800Nm) or higher torque output 50% of the time, providing exceptional pulling power for heavy-duty applications.
Growshine valves are manufactured using premium materials and precise engineering to withstand the high temperatures and pressures in modern diesel engines, ensuring reliable performance and extended service life.
Growshine International Business Services
Growshine International (格莳国际) specializes in the import and export of engineering machinery parts, heavy truck parts, agricultural machinery parts, and automotive parts. Our product range includes engine components, hydraulic systems, transmission parts, and electrical components for various industrial applications.
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Click Here for Denso Relay DealsComponent Explanations
Turbocharger
A device that uses exhaust gases to force more air into the combustion chamber, increasing engine power and efficiency. Installed on the exhaust manifold. Example: Garrett turbocharger on Volvo EC480D excavator.
涡轮增压器 / Турбокомпрессор
Hydraulic Pump
Converts mechanical power into hydraulic energy, creating flow and pressure in hydraulic systems. Mounted on the engine. Example: Kawasaki K3VLS series pump on Komatsu PC300-8 excavator.
液压泵 / Гидравлический насос
Fuel Injection Nozzle
Precisely atomizes and delivers fuel into the combustion chamber at high pressure. Installed in the cylinder head. Example: Bosch injector on John Deere 6135M tractor.
喷油嘴 / Форсунка впрыска топлива
Starter Motor
Electrical motor that rotates the engine to initiate operation. Mounted on the engine block. Example: Mitsubishi starter on Isuzu FVR 18.5 ton truck.
起动机 / Стартер
Wheel Cylinder
Converts hydraulic pressure from the brake fluid into mechanical force to press brake shoes against drums. Located in brake assemblies. Example: Wheel cylinder on Isuzu NPR75 brake system :cite[9].
车轮制动缸 / Тормозной цилиндр колеса
Control Valve
Regulates fluid flow and direction in hydraulic systems. Critical component in hydraulic circuits. Example: Control valve on Caterpillar 320GC excavator :cite[2].
控制阀 / Управляющий клапан
Piston Ring
Seals the combustion chamber, regulates oil consumption, and transfers heat from piston to cylinder wall. Fitted on pistons. Example: Piston rings in Cummins QSL9 engine.
活塞环 / Поршневое кольцо
Radiator
Cools engine coolant to maintain optimal operating temperature. Mounted at the front of vehicles. Example: Radiator on Kenworth T680 truck.
散热器 / Радиатор
Alternator
Charges the battery and powers electrical systems while the engine is running. Driven by engine belt. Example: Hitachi alternator on Hino 500 Series truck.
交流发电机 / Генератор переменного тока
Clutch Disc
Transmits engine power to transmission and allows for smooth engagement. Located between engine and transmission. Example: Clutch disc on Ford F-650 transmission.
离合器片 / Ведущий диск сцепления
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Find Caterpillar PartsTroubleshooting Guide: Isuzu FVR 18.5 Ton Truck Engine Overheating
Problem: Isuzu FVR 18.5 ton truck with 6HK1 engine experiencing consistent overheating during heavy load operations, particularly in hot weather conditions.
Diagnosis: After comprehensive inspection, identified multiple contributing factors including partially blocked radiator, worn water pump impeller, and degraded coolant.
Solution:
Completely flush cooling system to remove debris and deposits
Replace water pump with new OEM unit to restore proper coolant flow
Install new thermostat and pressure test radiator cap
Refill with appropriate ethylene glycol-based coolant at correct concentration
Clean external radiator fins and ensure proper airflow through radiator core
Verify proper operation of cooling fan and fan clutch
Result: Engine operating temperature returned to normal range (80-90°C) even under full load conditions, preventing potential engine damage and maintaining optimal performance.
