4JB1 Engine Gasket Kit 5-87812-596-1 5-87810-457-2 For ISUZU NKR NHR ELF 2.8L

Complete engine overhaul gasket kit seals all critical engine joints, restoring compression, preventing fluid leaks, and ensuring reliable operation for Isuzu 4JB1 and 4JB1T diesel engines.

The 4JB1 Engine Gasket Kit (OEM Numbers: 5-87812-596-1 / 5-87810-457-2 / 5-87812-706-0 / 5-87815-175-2) is a premium-quality, complete overhaul gasket set designed specifically for Isuzu 4JB1 and 4JB1T 2.8L diesel engines, widely used in Isuzu NKR, NHR, NKS, ELF 250, and PickUp trucks, as well as various industrial and construction machinery including Daewoo, Hitachi, Kobelco, and Sumitomo equipment.

• OE Quality: Manufactured to strict Isuzu dimensional and material specifications for perfect fit and function.
• Complete Kit: Includes all necessary gaskets and seals for a full engine overhaul - no need to order individual parts.
• High-Quality Materials: MLS head gasket, composite fiber gaskets, and rubber seals withstand extreme temperatures and pressures.
• Precision Die-Cut & Molded: Exact fit ensures reliable sealing and prevents leaks.
• Restores Engine Integrity: Eliminates oil leaks, coolant loss, and compression leaks caused by worn or hardened gaskets.
• Prevents Fluid Cross-Contamination: Seals coolant and oil passages to prevent mixing and engine damage.
• Direct Replacement: Matches OE gasket dimensions and sealing configurations.
• Long Service Life: Engineered for heavy-duty commercial and industrial diesel engine applications.
• Cost-Effective Rebuild: Buying a complete set is more economical than purchasing individual gaskets.
• Professional Quality: Suitable for engine rebuilders, workshops, and fleet maintenance.

This gasket kit is specifically designed for Isuzu diesel engines and equipment using the 4JB1 engine family.

• Isuzu NKR55, NHR, NKR, NKS (Light-Duty Trucks)
• Isuzu ELF 250 (Light-Duty Trucks)
• Isuzu PickUp (Pickup Trucks)
• Isuzu Bighorn 2.8 D, Trooper 2.8 D (SUV)

• Compact Loaders: 843, 853, 1213, 960, 2060, 2070
• Daewoo Excavators: DH55, DX60, SOLAR 55
• Hitachi Excavators: EX60UR, SH60
• Kobelco Excavators: SK60, SK70, SK75, 70SR, 80MSR, K903C
• Sumitomo Excavators: SH60

• Engine Code: 4JB1 / 4JB1T / 4JB1-PK / 4JB1-PK01
• Type: Inline-4, 4-Stroke, Water-Cooled, OHV, Direct Injection
• Displacement: 2.8L (2,771cc)
• Bore × Stroke: 93 mm × 102 mm
• Compression Ratio: 18.2:1
• Fuel Type: Diesel

Professional engine builder or mechanic installation is strongly recommended:

1. Ensure engine is cool - Allow the engine to cool completely before disassembly.
2. Disconnect battery - Always disconnect the negative terminal before working.
3. Drain fluids - Drain engine oil and coolant into suitable containers.
4. Disassemble engine - Remove components as required for the overhaul (cylinder head, oil pan, timing cover, etc.).
5. Clean all mating surfaces - Thoroughly clean all gasket surfaces; remove old gasket material, oil, and debris.
6. Check surface flatness - Inspect cylinder head and block decks for warpage; resurface if necessary.
7. Install new gaskets - Position each new gasket correctly, ensuring proper alignment with dowel pins and bolt holes.
8. Use new head bolts - If torque-to-yield (TTY) head bolts are specified, always use new bolts.
9. Torque in sequence - Tighten all fasteners to manufacturer torque specifications in the correct sequence.
10. Reassemble engine - Reinstall all components in reverse order of disassembly.
11. Refill fluids - Fill with correct engine oil and coolant mixture.
12. Prime oil system - Crank engine without starting (if possible) to prime oil system.
13. Start and test - Start engine and check for leaks at all gasket surfaces.
14. Re-torque if required - Some gaskets may require re-torquing after initial heat cycle.
15. Road test / Operational test - Test the machine to verify proper engine operation and no leaks.

• Material Verification: Confirms gasket and seal materials meet Isuzu temperature, pressure, and fluid resistance specifications.
• Dimensional Inspection: Gasket dimensions, bolt hole locations, and port openings verified within OEM tolerances.
• Fit Testing: Sample assembled to ensure proper fit and sealing.
• Visual Inspection: 100% checked for defects, cuts, or manufacturing flaws.
• Packaged Safely: Protected and packaged to prevent damage during transit.

• Neutral export packing or customized packaging available
• Carton or wooden case for safe transportation
• Fast delivery for stock items
• Shipping by Express Air or Sea