High-Strength Alloy Steel Connecting Rod Assembly for ISUZU 4JJ1 4JK1 - OEM Spec H-Beam Construction

The Connecting Rod Assembly with OEM numbers 8-97388921-0 and 8973889210 is a verified OEM-grade direct replacement for ISUZU 4JJ1 and 4JK1 diesel engines, commonly found in NKR, NPR, N-Series trucks, and D-MAX pickups.

As one of the most critical components in the engine, the connecting rod provides the vital mechanical link between the piston and the crankshaft. It is responsible for converting the linear reciprocating motion of the piston into the rotational motion of the crankshaft, transmitting immense combustion forces under continuous high-stress conditions.

If your connecting rod is failing, you may experience one or more of the following symptoms:

• Engine Knocking Noise: A deep, metallic knocking or rattling sound from the engine block, especially under load or acceleration — indicates excessive bearing clearance or rod bolt failure.
• Loss of Engine Power: Significant reduction in engine performance and responsiveness — the piston is not transmitting force efficiently.
• Oil Pressure Drop: Low oil pressure warning — worn bearings or a cracked rod can cause oil pressure loss.
• Metal Shavings in Oil: Visible metallic particles in the engine oil during servicing — indicates severe internal wear.
• Catastrophic Engine Failure: If a connecting rod breaks, it can punch through the engine block, resulting in complete engine destruction.

Our manufacturing and inspection processes ensure every connecting rod meets or exceeds ISUZU OEM standards.

• Always replace connecting rods in complete sets (4 per engine for 4-cylinder) to maintain balance
• Inspect the crankshaft journals for scoring or wear — regrind or replace if necessary
• Replace connecting rod bearings simultaneously
• Ensure the engine block and cylinder bores are clean and free of debris
• Use new rod bolts — they are torque-to-yield and must be replaced

1. Ensure the engine is completely disassembled and the cylinder block is clean
2. Lubricate the new connecting rod bearings with clean engine oil
3. Install the connecting rod onto the crankshaft journal with the bearing in place
4. CRITICAL: Install the connecting rod cap and torque the rod bolts to the manufacturer's specified torque settings (refer to ISUZU workshop manual)
5. Verify the connecting rod side clearance meets specifications
6. Install the piston and piston pin assembly onto the connecting rod small end
7. Rotate the crankshaft to verify smooth operation and no binding
8. Reassemble the engine following the workshop manual procedures

• Inspection: During major engine overhauls (every 300,000-500,000 km). Check for unusual knocking noises or metal particles in oil
• Replacement: Recommended during engine rebuilds or immediately if failure symptoms appear

Packaging: Each connecting rod is securely packed in protective packaging to prevent shipping damage.

Suitable for: Wholesale distributors, engine rebuild shops, truck repair facilities, construction equipment service centers, and fleet owners.