Centrifugally Cast High-Alloy Cast Iron Cylinder Liner Set Wet Type with O-rings for Isuzu NHR55 4JB1 Engine OEM Specification 93mm

• OE Quality: Manufactured to Isuzu dimensional and material specifications for perfect fit and long service life
• Complete Set: Includes 4 liners - no need to order individually
• Centrifugal Casting: Produces dense, uniform grain structure for high strength and wear resistance
• Precision Machined: Accurate bore size (93mm) and roundness for proper ring seal
• Plateau Honed Finish: Optimized surface finish for immediate ring seating
• Corrosion Resistant: Alloy composition resists cavitation erosion in wet liner applications
• Restores Engine Performance: Eliminates blow-by, low compression, and high oil consumption
• Direct Replacement: Drop-in or press-fit installation
• Cost-Effective: Affordable alternative to genuine OEM liners

This cylinder liner set is specifically designed for Isuzu NHR55 trucks with 4JB1 engine.

• ISUZU NHR55 (light-duty truck, 4JB1 engine)
• May also fit other Isuzu models using the 4JB1 engine (e.g., NKR, NPR, TFR) - verify compatibility

• 4-Cylinder, Inline Diesel, OHV
• Displacement: 2.8L (2771cc)
• Bore × Stroke: 93mm × 102mm (typical)

Installation steps (overview for wet liners - typical for 4JB1):

1. Remove cylinder head, pistons, and old liners from block (use a liner puller)
2. Clean block liner bores - remove rust, old O-ring residue, and debris
3. Inspect block counterbores - check for damage or corrosion
4. Install new O-rings onto the new liners (upper and lower seals)
5. Lubricate O-rings and liner outer surface with clean engine oil or soapy water
6. Press or drop new liners into the block bores - ensure they seat fully against the counterbore
7. Measure liner protrusion above the block deck using a dial indicator and straight edge. Protrusion should be within OE spec (typically 0.05-0.15mm). Adjust with shims if necessary
8. Hone the liners to final size (if needed) and to create a cross-hatch pattern
9. Clean liners thoroughly - remove honing residue
10. Install new pistons and rings, then cylinder head with new head gasket
11. Fill coolant and check for leaks

• Material Verification: Cast iron alloy composition and hardness tested
• Dimensional Inspection: ID (93mm), OD, length, flange height, and concentricity verified
• Surface Finish Test: Bore roughness (Ra) measured
• Hydrostatic Test: Liners pressure-tested for porosity
• Visual Inspection: 100% checked for casting defects or machining errors
• Packaged Safely: Coated with anti-rust oil, individually wrapped, boxed as a set with foam

• 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