Cylinder Liner Kit for ISUZU 4JH1T Engine - Centrifugally Cast High-Strength Alloy Iron with Plateau-Honed Finish and Direct OEM Replacement

An OE-grade, plateau-honed wet cylinder liner set for ISUZU 4JH1T diesel engines. Provides a precision wear surface for piston rings, restores compression, eliminates blow-by, and ensures optimal heat transfer—critical for a successful high-mileage engine overhaul.

The Engine Cylinder Liner Kit (OEM Numbers: 5-87814091-3 / 5878140913) is a direct-fit, OE-quality wet cylinder sleeve set engineered for ISUZU NKR77 series light/medium trucks and compatible commercial platforms powered by the 4JH1-TC 3.0L turbo-diesel engine —the same 3.0L 4-cylinder engine family that also includes 4JH1-T and early 4JJ1-TC variants.

This comprehensive kit includes four precision-cast wet liners, providing a brand-new, factory-spec working surface for the piston rings. As the single most important wear component in a diesel engine, these liners are responsible for restoring cylinder compression, eliminating blow-by, reducing oil consumption, and enabling efficient heat transfer from the combustion process to the cooling system.

Manufactured under ISO/TS16949 quality management standards, each liner features centrifugally cast, high-strength alloy iron construction—a process that produces a liner with a dense, uniform grain structure, free from blow holes or internal voids, for exceptional wear resistance and durability under heavy-duty conditions.

The inner bore receives a plateau-honed finish (Ra 0.2–0.4 μm) that promotes rapid ring seating, reduces friction, and minimizes oil consumption, while the outer diameter is precision-ground to tight tolerances for a proper interference fit.

• OE Quality: Manufactured under strict ISO/TS16949 quality management, ensuring consistent, traceable, and reliable output
• Centrifugal Casting: Premium Cr-Mo alloy iron cast using centrifugal force for maximum wear resistance and structural integrity
• Plateau-Honed Finish: Two-step honing process creates smooth surface with fine oil-retaining valleys for rapid ring seating
• Wet Liner Design: Direct coolant contact provides superior heat transfer for high-load operation
• Complete Set: Includes all four liners required for full engine rebuild
• Restores Compression & Power: Replaces worn bores to eliminate blow-by and power loss
• Stops Oil Consumption: Fresh bore surface combined with new piston rings drastically reduces oil consumption
• Extends Engine Life: Can extend service life by another 300,000 km when installed with new components
• Wet Liner Serviceability: Enables multiple rebuilds without scrapping the engine block
• Proven Performance: Trusted solution for Isuzu NKR77, NPR, D-MAX, and Holden Rodeo vehicles worldwide

• Material Verification: High-strength Cr-Mo alloy iron composition verified via spectrographic analysis
• Dimensional Accuracy: All critical dimensions measured to within ±0.01 mm using CMM equipment
• Surface Finish Inspection: Plateau-honing verified with profilometer for optimal oil retention
• Hardness Testing: Brinell hardness range 207–255 HB verified across multiple points
• Leak Testing: 100% hydraulic pressure-tested at 1.5 bar for 30 seconds
• Fitting Interference Validation: Sample liners installed into test blocks to verify correct fit
• Metallurgical Microstructure: Checked for uniform distribution of Type A graphite
• Quality Certified: ISO 9001:2015 / IATF 16949 certified facility

• Individual Packaging: Each set of 4 liners oiled, wrapped in anti-corrosion VCI paper, and boxed in heavy-duty carton
• Wholesale Orders: Available in case packs of 5 sets (20 liners) or 10 sets (40 liners); pallet pricing available
• Customization: Neutral or private-label retail packaging available for volume orders
• Fast Shipping: Ready stock for immediate dispatch worldwide via express courier or sea freight
• Wholesale Support: Long-term supply agreements and tiered commercial pricing available