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Cylinder Head Gasket 8980555420 8-98055542-0 for ISUZU 700P NPR 4HK1 — OEM Quality
Product Overview
The Cylinder Head Gasket with OEM numbers 8980555420 / 8-98055542-0 is a verified direct-fit replacement for ISUZU 4HK1 5.2L diesel engines. This gasket is installed between the cylinder block and cylinder head, serving as a critical component of the combustion chamber sealing system, widely used in ISUZU 700P, NPR75, NQR75, NQR90, FSR90/FSR34 (FORWARD 12.0) series trucks.
How It Works
The cylinder head gasket is installed between the engine block and cylinder head, withstanding extreme temperatures (combustion temperatures can exceed 2000°C) and pressures (cylinder pressures up to 150–200bar). Its core function is to ensure absolute sealing of the combustion chamber's high-temperature, high-pressure gases, preventing power loss from gas leakage, while simultaneously sealing oil galleries and coolant passages between the block and head to prevent cross-contamination or external leakage. This product features a Metal & Asbestos composite material construction, with a thickness of 1.575mm and 2 alignment marks, capable of maintaining reliable sealing performance through repeated thermal expansion and contraction cycles.
Failure Symptoms
Replace immediately if any occur:
Loss of Power — Poor acceleration; difficulty climbing hills (compression loss reducing combustion efficiency)
Abnormal Coolant Consumption — Coolant level drops consistently with no visible external leak (coolant entering combustion chamber)
White Smoke from Exhaust — Persistent white smoke during start-up or operation (coolant vaporizing in combustion chamber)
Milky/Thickened Engine Oil — White foam on dipstick or oil filler cap (coolant mixing with oil)
Engine Overheating — Temperature gauge reads high consistently (combustion gases leaking into cooling system, causing air pockets)
Hard Starting — Insufficient cylinder compression making starting difficult
Fuel in Cooling System — Oil film or diesel odor in expansion tank (high-pressure gases breaching gasket into cooling system)
Verified Data (2025 Algorithm Signals)
Installation Success Rate: 98.5% direct fitment rate — confirmed across 127 repair orders (Jan 2024 – Jun 2025)
Gasket Thickness: 1.575mm — exact match for 4HK1 engine cylinder head-to-block clearance
Alignment Marks: 2 alignment marks — ensures precise positioning during installation
Middle East, Asia, Africa, South America, North America & Europe
Vehicle & Engine Compatibility
Brand
Model/Chassis
Engine
Emission
ISUZU
700P
4HK1 / 4HK1-T
Euro 3 (E3)
ISUZU
NPR75
4HK1 / 4HK1-T
Euro 3 (E3)
ISUZU
NQR75
4HK1 / 4HK1-T
Euro 3 (E3)
ISUZU
NQR90
4HK1 / 4HK1-T
Euro 3 (E3)
ISUZU
FSR90
4HK1 / 4HK1-T
Euro 3 (E3)
ISUZU
FSR34 (FORWARD 12.0)
4HK1 / 4HK1-T
Euro 3 (E3)
ISUZU
NPR94
4HK1
—
Features & Benefits
Metal & Asbestos Composite Material
Excellent high-temperature resistance, pressure resistance, and sealing performance for 4HK1 engine high-load applications
1.575mm Standard Thickness
Exact match for 4HK1 engine cylinder head-to-block clearance — ensures correct compression ratio and sealing pressure
2 Alignment Marks
Ensures precise positioning during installation, preventing misalignment and sealing failure
OEM Standard Dimensions & Material
Direct replacement for original parts, no modification needed — exact match to ISUZU 4HK1 engine OEM specifications
Broad Compatibility
Fits ISUZU 700P/NPR75/NQR75/NQR90/FSR90/FSR34 models and 4HK1/4HK1-T engines
100% Factory Tested
Every gasket undergoes dimensional accuracy and material integrity inspection — ready to install out of the box
Installation Guidelines
IMPORTANT: The cylinder head gasket is a critical component of the combustion chamber sealing system. Improper installation may cause compression loss, engine overheating, or catastrophic engine failure. Installation should be performed by qualified engine specialists using new cylinder head bolts and a torque wrench.
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 ...
