High-strength forged steel connecting rod with shot-peened surface for direct OEM replacement in Isuzu 4JB1 engine

Connecting rod transmits the reciprocating motion of the piston to the rotational motion of the crankshaft. Forged steel construction ensures high strength and fatigue resistance for Isuzu 4JB1 diesel engines and excavator applications.

• OE Quality: Manufactured to Isuzu dimensional and material specifications for perfect fit and reliable power transmission
• High-Strength Forging: Forged steel construction provides superior tensile and fatigue strength
• Precision Machining: Center-to-center length, bore roundness, and weight matched within tight tolerances
• Shot-Peened Surface: Enhances fatigue resistance and stress distribution
• Full Floating Design: Bushed small end allows for serviceable wrist pin bushing
• Restores Engine Performance: Eliminates knocking, vibration, and power loss caused by worn or bent rods
• Direct Replacement: Matches OE weight, length, and pin/bearing diameters
• Cost-Effective: Affordable alternative to genuine Isuzu connecting rods without compromising quality

This connecting rod is specifically designed for Isuzu 4JB1 engines. Common applications include:

• ISUZU NKR series (light-duty trucks with 4JB1)
• EC55B excavator
• DH55 excavator
• Forklifts with 4JB1 engine
• Industrial applications using 4JB1 engine

• 4-Cylinder, Inline Diesel, OHV
• Displacement: 2.8L (2771cc)

Installation steps (overview):

1. Clean the connecting rod and inspect for cracks or damage
2. Install new connecting rod bearings (upper and lower halves)
3. Lubricate bearings and crank journal with engine assembly lube
4. Attach the piston to the connecting rod using the piston pin and retainers
5. Install piston rings and compress them with a ring compressor
6. Insert piston/rod assembly into the cylinder bore, guiding the rod onto the crankshaft journal
7. Install the connecting rod cap with new bolts. Torque bolts to specification in stages
8. Verify bearing clearance using plastigauge before final torque
9. Rotate crankshaft to ensure smooth movement after all rods are installed
10. Proceed with engine assembly

• Material Verification: High-strength steel/alloy composition and tensile strength tested
• Dimensional Inspection: Center-to-center length, bore diameters, parallelism, and twist verified against OE blueprints
• Hardness Testing: Core hardness within specified range
• Magnaflux Inspection: 100% crack detection on forged blanks
• Weight Matching: Balanced for consistent reciprocating mass (when ordered as a set)
• Visual Inspection: 100% checked for machining defects, burrs, or surface flaws
• Packaged Safely: Rod wrapped in protective plastic, boxed 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