High-Grade Alloy Cast Iron Cylinder Block Liner with Wet Liner Design and Precision Machining for ISUZU 6HK1 4HK1 Engine

The Cylinder Block Liner (OEM Numbers: 8943916020 / 8-94391602-0) is a premium-quality, direct replacement engine component designed specifically for ISUZU FVZ34 heavy-duty trucks equipped with 6HK1 and 4HK1 diesel engines.

• OE Quality: Manufactured to strict ISUZU dimensional and metallurgical specifications for perfect fit and function
• High-Grade Alloy Cast Iron: Provides exceptional wear resistance and long service life under heavy-duty conditions
• Precision Machining: Cylinder bore finished to exacting tolerances for correct piston-to-wall clearance
• Optimized Honed Surface: Promotes rapid ring seating and reduces oil consumption from the first start
• Excellent Heat Transfer: Wet liner design ensures efficient heat transfer from combustion chamber to coolant
• Restores Compression: Eliminates blow-by and power loss caused by worn or out-of-round cylinder bores
• Reduces Oil Consumption: Restores proper bore geometry to minimize oil consumption
• Direct Replacement: Simplifies installation during engine overhaul
• Reliable Sealing: Correct liner protrusion ensures proper cylinder head gasket sealing
• Long Service Life: Engineered to withstand the rigorous demands of heavy-duty commercial operation

This cylinder liner is specifically designed for ISUZU heavy-duty trucks and equipment.

• ISUZU FVZ34 - Heavy-Duty Trucks
• ISUZU FR Series - Various commercial vehicle models

• ISUZU 6HK1 - 6-Cylinder, Inline Diesel
  • Displacement: 7.8L (7790cc)
  • Turbocharged, Intercooled
  • Widely used in FVZ series heavy-duty trucks
• ISUZU 4HK1 - 4-Cylinder, Inline Diesel
  • Displacement: 5.2L (5193cc)
  • Turbocharged, Intercooled
  • Used in NPR, NQR, and various industrial applications

• Heavy-duty trucks, buses, construction equipment, generators, and various industrial machinery utilizing 6HK1 or 4HK1 engines

1. Prepare the cylinder block - Thoroughly clean the block and inspect for cracks or damage
2. Remove old liners - Use a proper liner puller to remove worn liners from the block
3. Clean liner bores - Remove all debris, old sealant, and rust from the block liner counterbores
4. Inspect and measure block bores - Ensure block bore dimensions are within specification for new liner installation
5. Measure new liners - Verify all dimensions (ID, OD, length) against OEM specifications
6. Check liner protrusion - Install liners without seals to measure protrusion above the deck; shim if necessary
7. Install liner seals (O-rings) - Install new O-ring seals on the liner lower section (wet liner design)
8. Apply sealant - Apply approved sealant to the liner seating surface if specified
9. Press-fit the liner - Use a proper press and mandrel to install the liner into the block
10. Check protrusion again - Measure final liner height above the block deck to ensure correct cylinder head clamping
11. Hone if necessary - Perform final plateau honing to achieve the correct finish for ring seating
12. Clean thoroughly - Wash the block and bores to remove all installation debris
13. Install new pistons and rings - Use new rings and ensure proper ring gap orientation
14. Check rotating assembly - Ensure crankshaft and connecting rods rotate freely

• Material Verification: Spectrographic analysis confirms alloy composition meets ISUZU specifications
• Dimensional Inspection: Inner diameter, outer diameter, and height verified against OEM tolerances
• Surface Finish Inspection: Honed surface roughness (Ra) verified to optimize ring seating and oil retention
• Roundness & Straightness: Cylinder bore roundness and straightness checked to prevent blow-by and oil consumption
• Hardness Testing: Material hardness verified to ensure wear resistance
• Wall Thickness Check: Uniform wall thickness verified for consistent heat transfer
• Visual Inspection: 100% checked for casting porosity, cracks, or machining defects
• Rust Protection: Coated with rust inhibitor and sealed for storage and 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