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Cylinder Head Gasket 8-97375435-0 8973754350 for ISUZU NPR 4HK1 5.2L — OEM MLS 1.60mm (2-Hole)
Product Overview
The Cylinder Head Gasket with OEM numbers 8-97375435-0 and 8973754350 is a verified OEM-grade direct replacement for ISUZU NPR, NPR-HD, and NQR series trucks equipped with the 4HK1 5.2L diesel engine. This critical sealing component features Multi-Layer Steel (MLS) construction to seal combustion chambers, coolant passages, and oil channels between engine block and cylinder head.
Real Shop Test Data: Precision-engineered MLS construction with 2-hole designation verified against ISUZU OEM specifiions
Proven Durability: Rated for 400,000+ km under normal operation per ISUZU N-Series standards
Installation Success Rate: 99% direct replacement fitment confirmed across thousands of engine rebuilds
If your cylinder head gasket is failing, you may experience:
Engine overheating with temperature gauge rising above normal
Unexplained coolant loss without visible external leaks
White smoke from exhaust indiing coolant in combustion chamber
Oil contamination with milky or frothy appearance
Significant loss of engine power due to compression loss
Bubbling in radiator or coolant reservoir
Warning: A failing cylinder head gasket can lead to severe engine damage including warped cylinder heads, cracked engine blocks, or complete engine failure.
Part Number
8-97375435-0 8973754350
Product Name
Cylinder Head Gasket
Car Model
ISUZU NPR
Engine Model
ISUZU 4HK1
Condition
100% Brand New
Thickness & Notch Selection Guide
CRITICAL: ISUZU 4HK1 engines use three different thickness head gaskets. Using the wrong gasket can cause engine damage. The correct gasket is determined by measuring piston protrusion.
Gasket Grade / Notch
Projection Value
Gasket Thickness
Part Number
No-Hole
0.0173"-0.0204" (0.439-0.519mm)
1.50mm
8-97375433-1
1-Hole
0.0204"-0.0232" (0.519-0.589mm)
1.55mm
8-97375434-1
2-Hole
0.0232"-0.0263" (0.589-0.669mm)
1.575-1.60mm
8-97375435
How to Determine the Correct Gasket
Clean the engine block deck of all gasket material, carbon, or debris
Place a dial indior on the deck surface and measure piston protrusion at TDC
Measure each of the four cylinders
The gasket to use is based on the highest projection value recorded
Check the gasket for holes (no hole, one hole, or two holes depending on thickness)
Please confirm with your customer:
Piston protrusion measurement from the engine (highest value)
Hole count on the original gasket (0, 1, or 2 holes)
Original part number from the old gasket
Vehicle & Engine Compatibility
Primary Appliions
Brand
Model
Series / Chassis
Engine
Years
ISUZU
NPR
N-Series
4HK1 5.2L
2005-2007
ISUZU
NPR-HD
N-Series
4HK1 5.2L
2005-2009
ISUZU
NQR
N-Series
4HK1 5.2L
2005-2007
ISUZU
NRR
N-Series
4HK1 5.2L
1998-2010
Cross-Brand / Equipment Appliions
Brand
Equipment Type
Models
Hitachi
Crawler Excavators
ZX Series (4HK1 powered)
JCB
Crawler Excavators
JS Series (4HK1 powered)
Case
Crawler Excavators
CX Series (4HK1 powered)
Important:
Designed for ISUZU 4HK1 5.2L diesel engines only
This is a 2-hole (1.575-1.60mm) gasket - verify your engine requires this thickness
Compatible with ISUZU NPR, NPR-HD, NQR, NRR, and ELF series trucks
Also used in Hitachi, JCB, Case, and New Holland construction equipment
Verify vehicle VIN number, engine serial number, or model code before ordering
Features & Benefits
OEM Specifiion
Guarantees factory-fit quality and performance with verified ISUZU OEM part numbers
Multi-Layer Steel Construction
Superior sealing under extreme combustion pressure and temperature
1.575-1.60mm Thickness (2-Hole)
Maintains correct compression ratio for specific piston protrusion requirements
Anti-Fatigue Design
Minimizes gasket fatigue and increases reliability against leaks
Heat-Resistant & Durable
Withstands extreme combustion conditions while maintaining performance
Cross-Industry Compatibility
Fits ISUZU trucks and construction equipment with verified cross-reference
Quality Control & Verifiion
QC Item
Verifiion Method
Dimensional Accuracy
Precision inspection to verify 1.575-1.60mm thickness, 2-hole count, and sealing surface dimensions
Material Composition
Laminated steel layer analysis to verify anti-fatigue characteristics and heat resistance
Leakage Test
100% pressure testing to guarantee zero gas, coolant, or oil leakage
Compression Simulation
Dynamic compression testing to verify sealing performance under operating conditions
Durability Cycle Test
500+ hour thermal and pressure cycling to verify 400,000+ km service life
Installation & Maintenance Recommendations
Professional Installation Highly Recommended
Replacing a cylinder head gasket requires proper torque specifiions, correct gasket positioning, and thorough engine component inspection.
Pre-Installation Checklist
Verify gasket thickness matches original - confirm 2-hole (1.575-1.60mm) designation
Measure piston protrusion for each cylinder - use highest value recorded
Inspect cylinder head and engine block sealing surfaces for warpage or damage
Clean all sealing surfaces thoroughly - debris can cause premature failure
Check cylinder head bolt threads and replace if damaged
Use new cylinder head bolts if recommended by workshop manual
Installation Guidelines
Ensure engine is completely disassembled with cylinder head removed
Clean cylinder head and engine block sealing surfaces with appropriate solvent
Check flatness of both surfaces using precision straightedge and feeler gauge
Position new gasket correctly - ensure 2-hole orientation matches OEM specifiions
Install cylinder head onto gasket
Follow angular tightening method specified in ISUZU workshop manual
Torque cylinder head bolts in correct sequence to specified values
Reassemble remaining engine components
Refill with fresh coolant and engine oil
Start engine and check for leaks
Perform cooling system pressure test to verify seal integrity
Packaging & Supply
Packaging: Securely packed in protective packaging to prevent shipping damage
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 ...
