Isuzu 4JB1 Engine Gasket Kit for Excavator – Complete Overhaul Set | Isuzu Excavator Engine Parts
This premium Isuzu 4JB1 Engine Gasket Kit is specifically engineered for Isuzu 4JB1 diesel engines used in compact to mid-sized excavators. Manufactured to meet or exceed OEM specifications, this comprehensive set includes every sealing component needed for complete upper and lower engine overhaul, ensuring leak-free operation and restored engine compression.
Engine Specifications
The Isuzu 4JB1 is a 2.8L (2771cc), inline 4-cylinder, 4-stroke, water-cooled diesel engine known for robust cast iron construction, fuel efficiency, and legendary reliability. This engine delivers 57-68 kW (76-91 HP) depending on configuration.
OEM Reference Numbers
5878107470, 5878108830, 5878116640, 5878107480, 5878108840, 5878116650, 5878107490, 5878108850, 5878116660, 5878127426, 5878127436, 5878127446, 5-87810-289-2, 8-97080-893-0
Kit Contents
| Component |
Quantity |
Material / Remarks |
| Cylinder Head Gasket |
1 |
Multi-Layer Steel (MLS) / Stainless Steel |
| Exhaust Manifold Gasket |
1 |
Graphite with steel core |
| Intake Manifold Gasket |
1 |
Composite fiber |
| Valve Cover Gasket |
1 |
Silicone rubber |
| Oil Pan Gasket |
1 |
Rubber / cork blend |
| Front Timing Cover Gasket |
1 |
Fiber / paper |
| Rear Main Seal |
1 |
PTFE / nitrile rubber |
| Front Crankshaft Oil Seal |
1 |
Nitrile rubber |
| Turbocharger Gaskets (set) |
2 |
Metal / graphite (for 4JB1T turbo models) |
| Fuel Injection Pump Gasket |
1 |
Paper |
| Water Pump Gasket |
1 |
Fiber |
| Thermostat Housing Gasket |
1 |
Rubber |
| EGR Cooler Gasket |
1 |
Multi-layer steel (where applicable) |
| Valve Stem Seals |
8 |
Viton |
| Injector Seals (copper) |
4 |
Annealed copper |
| Rocker Cover Gasket |
1 |
Silicone rubber |
| Oil Cooler Gasket |
1 |
Rubber / fiber composite |
| Oil Filler Cap Gasket |
1 |
Rubber |
| Glow Plug Seals (set) |
4 |
Copper / crush type |
| O-Ring Assortment |
Set |
Various sizes (Viton / NBR) |
Note: Kit contents may vary slightly depending on engine configuration (naturally aspirated vs. turbocharged, mechanical injection) and application. Please verify your engine serial number before ordering. Cylinder head gasket thickness must be selected based on engine block protrusion measurement.
Key Features
- OEM-Equivalent Quality – Strictly adheres to Isuzu dimensions and material standards
- Complete Overhaul Set – Includes all gaskets and seals for both upper and lower engine sections
- Multiple Thickness Options – Available in 1.60mm, 1.65mm, and 1.70mm cylinder head gasket thicknesses
- Superior Durability – MLS head gasket withstands extreme temperatures up to 1200°C
- Corrosion-Resistant Materials – Stainless steel and coated components resist rust
- Precision Fit – Direct bolt-on replacement; no modifications needed
- Comprehensive Leak Protection – Ensures oil, coolant, and combustion gases remain sealed
- High-Temperature Performance – Excellent resistance to exhaust gas temperatures
Applications
Engine Models
Isuzu 4JB1, 4JB1T (Turbocharged), 4JB1-TC diesel engine (2.8L / 2771cc)
Excavator Models
- Hitachi EX55, EX60, EX60-2, EX60-3, EX70, EX75
- Kobelco SK55, SK60, SK70, SK75, SK80
- SANY SY55C, SY60C, SY65C, SY70C, SY75C
- JCB JS55, JS60, JS70, JS75
- Case CX55, CX60, CX70, CX75
- Sumitomo SH55, SH60, SH70, SH75
- Kubota KX155, KX161, KX185 (with 4JB1 engine)
- And many more compatible models
Material Advantages
- MLS Cylinder Head Gasket: Multi-layer steel construction maintains sealing pressure under varying loads
- Viton Valve Stem Seals: Superior heat and oil resistance extending service life
- Precision-Machined Components: Ensures optimal alignment for maximum sealing performance
Important Installation Note: When installing the cylinder head gasket, tighten cylinder head bolts in 2-3 stages from the center outward following manufacturer torque specifications to ensure even compression and prevent distortion.
This full gasket set saves time and money compared to sourcing individual components separately, while ensuring all sealing points are addressed with matched, compatible components.
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