Cylinder Head Gasket 8-97375435-0 8973754350 For ISUZU NPR/NQR/NPR-HD 4HK1 5.2L Diesel — OEM Multi-Layer Steel (MLS) 2-Hole 1.60mm
Basic Properties
Place of Origin:
China
Brand Name:
YIMI
Model Number:
ISUZU NPR/NQR/NPR-HD 4HK1 5.2L Diesel
Trading Properties
Minimum Order Quantity:
10 pcs
Price:
Negotiable
Payment Terms:
T/T
Supply Ability:
10000 pcs/month
Specifications
| OEM Part Number: | 8-97375435-0 / 8973754350 | Part Name: | GASKET; CYL HD / Cylinder Head Gasket |
| Engine Compatibility: | ISUZU 4HK1, 4HK1-TC, 4HK1-TCS | Vehicle Models: | ISUZU NPR, NPR-HD, NQR, NPR75, ELF 400/500/600 |
| Gasket Grade / Notch: | 2-Hole (Two-Hole) | Gasket Thickness: | 1.575mm – 1.60mm |
| Projection Value Range: | 0.0232"–0.0263" (0.589–0.669mm) | Cylinder Bore Diameter: | 115.5mm |
| Material: | Stainless Steel / Multi-Layer Steel (MLS) | Net Weight: | 0.395 Kg |
| H/S Code: | 848410000 | Condition: | Brand New — 100% Quality Inspected |
| Warranty: | 12 Months | ||
| High Light: | Cylinder Head Gasket for ISUZU NPR 4HK1,MLS Cylinder Head Gasket 1.60mm,OEM ISUZU Diesel Head Gasket |
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Product Description
Cylinder Head Gasket 8-97375435-0 8973754350 For ISUZU NPR/NQR/NPR-HD 4HK1 5.2L Diesel — OEM Multi-Layer Steel (MLS) 2-Hole 1.60mm
Product Overview
The Cylinder Head Gasket with OEM numbers 8-97375435-0 and 8973754350 is a verified OEM-grade direct replacement for ISUZU 4HK1 5.2L diesel engines, commonly found in NPR, NQR, NPR-HD, and ELF series trucks.
Critical Fitment Note: The ISUZU 4HK1 engine uses three different thickness head gaskets based on piston protrusion. Using the wrong gasket can cause engine damage. Part number 8-97375435-0 is the 2-Hole (Two-Hole) variant with a thickness of 1.575-1.60mm.
Key Specifications:
- Real Shop Test Data: For piston protrusion range: 0.0232"-0.0263" (0.589-0.669mm)
- Proven Durability: Rated for 400,000+ km under normal operation
- Installation Success Rate: 99% direct replacement fitment
- OEM Cross-Reference Verified: Replaces 8-97375435-0, 8973754350, 8-97375435, 8973754351
Failure Symptoms
If your cylinder head gasket is failing, you may experience one or more of the following symptoms:
- Engine Overheating: Temperature gauge consistently rising above normal
- Coolant Loss: Unexplained drop in coolant level with no visible external leaks
- White Smoke from Exhaust: Steam-like white smoke indicating coolant entering combustion chamber
- Oil Contamination: Milky or frothy appearance on oil dipstick or filler cap
- Loss of Engine Power: Significant reduction in engine performance due to compression loss
- Bubbling in Radiator: Air bubbles visible in radiator or coolant reservoir
A failing cylinder head gasket can lead to severe engine damage including warped cylinder heads, cracked engine blocks, or complete engine failure. Prompt replacement is essential.
Thickness & Notch Selection Guide
IMPORTANT: 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) | 1.500mm | 8-97375433-21 |
| 1-Hole | 0.0204"-0.0232" (0.519-0.589mm) | 1.550mm | 8-97375434-21 |
| 2-Hole | 0.0232"-0.0263" (0.589-0.669mm) | 1.575-1.60mm | 8-97375435-21 |
How to Determine the Correct Gasket
- Clean the engine block deck of all gasket material, carbon, or other debris
- Place a dial indicator 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
- Hole ID Location: Check the gasket for holes - can be 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 Applications
| Brand | Model | Chassis / Series | Engine | Years |
|---|---|---|---|---|
| ISUZU | NPR / NPR-HD | N-Series | 4HK1 5.2L | 2005-2018 |
| ISUZU | NQR | N-Series | 4HK1 5.2L | 2005-2018 |
| ISUZU | NPR75 | N-Series | 4HK1-TCS | 2005-10/2007 |
| ISUZU | ELF 400 / 500 / 600 | N-Series | 4HK1 5.2L | 2022-12 |
Cross-Brand / Equipment Applications
| Brand | Equipment Type | Models | Engine |
|---|---|---|---|
| Hitachi | Crawler Excavators | ZX200-3, ZAX240-3 | 4HK1 |
| JCB | Construction Equipment | Various | 4HK1 |
Important:
- This cylinder head gasket is designed for ISUZU 4HK1 5.2L diesel engines only
- CRITICAL: This is a 2-Hole (1.575-1.60mm) gasket - verify your engine requires this thickness before ordering
- Please verify your vehicle's VIN number, engine serial number, or model code before ordering
Features & Benefits
Feature
Benefit + Verification Signal
OEM Specification - ISUZU Genuine Equivalent
Guarantees factory-fit quality and performance - verified by OEM part numbers
Multi-Layer Steel (MLS) Stainless Steel Construction
Delivers superior sealing under extreme combustion pressure and temperature
1.575-1.60mm Thickness (2-Hole)
Enables correct compression ratio maintenance for specified piston protrusion
Anti-Fatigue Design
Minimizes gasket fatigue and increases reliability against gas and water leakage
115.5mm Bore Diameter
Precision-matched to 4HK1 cylinder bore specifications
Lightweight Construction (0.395kg)
Easy to handle and install
Cross-Industry Compatibility
Fits ISUZU trucks and construction equipment
Direct Replacement Fitment
No modifications required - verified by 99% installation success rate
100% New - No Core Charge
Guarantees zero wear, immediate sealing performance, and full service life
Quality Control & Verification
| QC Item | Verification Method |
|---|---|
| Dimensional Accuracy | Precision inspection to verify 1.575-1.60mm thickness, 2-hole count, and 115.5mm bore diameter |
| Material Composition | Stainless steel / MLS 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 cycling and pressure cycling to verify 400,000+ km service life |
| Final Assembly Inspection | 100% visual and dimensional inspection before packaging |
Installation & Maintenance Recommendations
IMPORTANT: Professional Installation Highly Recommended
Replacing a cylinder head gasket requires proper torque specifications, correct gasket positioning, and thorough engine component inspection.
Replacing a cylinder head gasket requires proper torque specifications, correct gasket positioning, and thorough engine component inspection.
Pre-Installation Checklist
- Verify gasket thickness matches the original - confirm 2-Hole (1.575-1.60mm) designation
- Measure piston protrusion for each of the four cylinders - use the highest value recorded
- Inspect the cylinder head and engine block sealing surfaces for warpage or damage
- Clean all sealing surfaces thoroughly - any debris can cause premature gasket failure
- Check cylinder head bolt threads and replace if damaged
- Use new cylinder head bolts if recommended by the workshop manual
Installation Guidelines
- Ensure the engine is completely disassembled with the cylinder head removed
- Clean the cylinder head and engine block sealing surfaces with appropriate solvent
- Check the flatness of both surfaces using a precision straightedge and feeler gauge
- CRITICAL: Position the new gasket correctly - ensure the 2-hole orientation matches OEM specifications
- Install the cylinder head onto the gasket
- CRITICAL: Follow the angular tightening method specified in the ISUZU workshop manual
- Torque cylinder head bolts in the correct sequence and to the specified torque values
- Reassemble remaining engine components
- Refill with fresh coolant and engine oil
- Start the engine and check for leaks
- Perform a cooling system pressure test to verify seal integrity
Maintenance Schedule
- Inspection: During any cooling system service or if overheating symptoms appear
- Replacement: Immediately if failure symptoms appear. Also recommended during major engine overhauls
Packaging & Supply
- Packaging: Protective packaging (neutral box, color box, or custom brand package)
- Pack Quantity: 1 PCS
- Net Weight: 0.395 kg
- H/S Code: 848410000
- MOQ: Small quantity accepted; quantity discounts available
- Suitable for: Wholesale distributors, engine rebuild shops, truck repair facilities, construction equipment service centers, and fleet owners
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