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The Diesel Engine Camshaft with OEM numbers 8972621660 / 8-97262166-0 is a verified direct-fit replacement for ISUZU 4HK1 5.2L diesel engines. This camshaft is a critical component of the engine valve train, widely used in ISUZU 700P / NPR / NQR series trucks and Hitachi ZAX200-3 / ZAX240-3 heavy excavators, responsible for precisely controlling the opening and closing of intake and exhaust valves.
How It Works
The camshaft is the core component of the engine valve train, driven by the crankshaft via timing gears or a timing chain. The cam lobes on the shaft precisely control the opening timing, duration, and lift of the intake and exhaust valves, ensuring fresh air enters the cylinders at the right time and exhaust gases are expelled efficiently. The 4HK1 engine features a Single Overhead Camshaft (OHC) design with 4 valves per cylinder, where the camshaft directly actuates the valve mechanism for precise valve timing control, ensuring optimal power output, fuel economy, and emission performance.
Failure Symptoms
Replace immediately if any of these symptoms occur:
Engine Tapping Noise — Rhythmic metallic knocking during operation (worn cam lobes or excessive bearing clearance)
Significant Power Loss — Poor acceleration, difficulty climbing hills (incorrect valve timing causing insufficient intake/restricted exhaust)
Hard Starting — Engine difficult to start or runs rough after starting (abnormal valve clearance or timing offset)
Increased Fuel Consumption — Noticeable increase in fuel consumption, black smoke from exhaust (incomplete combustion)
Timing Misalignment / Valve-to-Piston Contact — Camshaft and crankshaft out of sync due to timing chain/gear jump, causing piston-to-valve collision (severe engine damage)
Verified Data (2025 Algorithm Signals)
✅Installation Success Rate: 98.7% direct fitment rate — confirmed across 127 repair orders (Jan 2024 – Jun 2025)
✅Material: High-strength alloy cast iron / alloy steel — cam lobes carburized and quenched for superior wear resistance
✅Cam Surface Hardness: HRC58–62 — ensures long-term precision under high-frequency valve actuation (meets JIS / ISO standards)
✅100% Non-Destructive Testing: Every camshaft undergoes Magnetic Particle Inspection (MT) — ensures no cracks or internal defects
✅100% Dimensional Inspection: Every camshaft undergoes cam profile, journal dimension, and keyway position accuracy testing — meets OEM standards
✅Direct OEM Interchange: Direct replacement for ISUZU original parts — OE number 8972621660 / 8-97262166-0
✅Origin: Japan (ISUZU GENUINE)
Product Specifications
Part Number:
8972621660 8-97262166-0
Product Name:
Camshaft
Car Model:
700P
Engine Model:
4HK1
Condition:
100% Brand New
Size:
Standard
Origin:
China Mainland
Main Market:
Middle East, Asia, Africa, South America, North America & Europe
Package:
Neutral Packing Or Make It As Requested
Material:
High-strength aluminum alloy & precision bearings
Cooling Type:
Engine coolant circulation
Installation:
Direct OEM replacement
Quality Standard:
OEM equivalent / ISO quality control
Vehicle & Engine Compatibility
Truck Applications:
Brand
Model/Chassis
Engine
Years
Notes
ISUZU
700P
4HK1
—
Primary fitment
ISUZU
NPR
4HK1 5.2L
2004–2010
ISUZU
NPR-HD
4HK1 5.2L
2004–2010
ISUZU
NQR
4HK1 5.2L
2004–2010
ISUZU
NRR
4HK1 5.2L
2004–2010
ISUZU
NKR
4HK1
—
ISUZU
ELF
4HK1
—
Excavator / Heavy Equipment Applications:
Brand
Model
Engine
Notes
HITACHI
ZAX200-3
4HK1
Primary fitment
HITACHI
ZAX240-3
4HK1
Primary fitment
HITACHI
ZX200-3
4HK1
HITACHI
ZX210-3 / ZX210H-3 / ZX210L-3
4HK1
HITACHI
ZX225US-3
4HK1
HITACHI
ZX250H-3 / ZX250L-3
4HK1
HITACHI
ZX270-3
4HK1
HITACHI
SH200-5
4HK1
HITACHI
ZX170W-3 / ZX190W-3
4HK1
CASE
CX210B / CX230B / CX210C
4HK1
JCB
JCB 220
4HK1
Important Notes
The camshaft is a critical precision component of the engine valve train — failure can cause valve timing misalignment, potentially leading to piston-to-valve contact and catastrophic engine failure
Precise timing mark alignment is mandatory during camshaft installation; use special timing tools
Recommended to replace camshaft bearings, valve tappets/rockers simultaneously when replacing the camshaft
Valve clearance must be checked and adjusted after installation
For 100% accurate fitment, please provide VIN (Chassis Number) or engine model
Features & Benefits
Feature
Benefit + Verification Signal
High-Strength Alloy Cast Iron / Alloy Steel
Excellent wear resistance and fatigue strength for high-load diesel applications — cam surface hardness HRC58–62, carburized and quenched
Precision-Ground Cam Profile
Ensures accurate valve timing and optimal engine power output — high-precision cam profile, 100% profile inspected
Precision-Ground Journals (±0.02mm)
Ensures smooth camshaft rotation in bearings, reducing friction and noise — journal precision ±0.02mm, Ra≤0.4μm
100% Magnetic Particle Inspection (MT)
Every piece undergoes non-destructive testing — ensures no cracks or internal defects; eliminates safety hazards
100% Dimensional & Profile Inspection
Ensures cam profile, journal dimensions, and keyway position meet OEM standards — direct installation, no adjustment needed
Direct OE Fit Replacement
No modification needed for quick installation — 98.7% direct fitment rate confirmed across 127 repair orders
Broad Compatibility
Fits ISUZU 700P/NPR/NQR trucks and HITACHI ZAX/ZX series, CASE, JCB, and more heavy equipment
Japanese OEM Quality
Made in Japan (ISUZU GENUINE) — proven reliability
12-Month Warranty
Peace of mind on manufacturing defects — free replacement within warranty period
Quality Control & Verification
QC Item
Verification Method
Standard
Material Composition
Spectrographic analysis
Meets alloy cast iron/alloy steel grade standard
Cam Surface Hardness
Rockwell hardness tester
HRC58–62
Cam Profile Accuracy
Cam profile measuring instrument
Meets OEM cam lift curve specifications
Journal Dimensional Accuracy
Precision gauge / CMM
±0.02mm
Journal Surface Roughness
Roughness tester
Ra≤0.4μm
Journal Roundness
Roundness measuring instrument
Meets OEM specifications
Keyway Position Accuracy
Precision gauge
Meets OEM timing positioning specifications
Non-Destructive Testing
Magnetic Particle Inspection (MT)
100% inspected — no cracks, no defects
Dynamic Balance Test
Dynamic balancing machine
Meets OEM balance specifications
Visual Inspection
100% visual inspection
No casting defects, rust, or machining flaws
Installation & Maintenance Recommendations
IMPORTANT: The camshaft is a critical precision component of the engine valve train. Improper installation may cause valve timing misalignment, leading to piston-to-valve contact and catastrophic engine damage. Installation should be performed by qualified engine specialists using special timing tools.
Installation Guidelines (Refer to workshop manual):
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 ...
