High-Strength Forged Alloy Steel Connecting Rod Assembly with Precision-Ground Bearing Surfaces for ISUZU 4JB1 Engine

Precision-forged connecting rod assembly connects the piston to the crankshaft, converting reciproing motion into rotary motion for efficient power delivery in ISUZU 4JB1 diesel engines.

• OE Quality: Manufactured to strict ISUZU dimensional and material specifiions for perfect fit and function
• Precision Forged Construction: High-strength alloy steel forging provides exceptional durability and fatigue resistance
• Precision Machining: Bearing surfaces ground to exacting tolerances for proper fitment and reliable operation
• No-Nut Design: Simplifies installation and maintenance
• Restores Engine Balance: Replaces worn or damaged rods to restore proper engine balance and smooth operation
• Ensures Reliable Power Transfer: Proper connecting rod function is essential for efficient power delivery
• Direct Replacement: Simple installation during engine rebuild or overhaul
• Long Service Life: Engineered to withstand the extreme forces of diesel engine operation

This connecting rod assembly is specifically designed for ISUZU vehicles and equipment equipped with the 4JB1 engine.

• ISUZU TFR55 - Pickup Trucks
• ISUZU TFS55 - Pickup Trucks
• ISUZU NPR - Light to Medium-Duty Trucks
• ISUZU NKR - Light to Medium-Duty Trucks
• Industrial Appliions - Forklifts, generators, compressors, and various equipment using 4JB1 engines

• 4-Cylinder, Inline Diesel
• Displacement: 2.8L (2771cc)
• Naturally Aspirated / Turbocharged (4JB1T)
• Valvetrain: OHV
• Widely used in TFR55, NPR, NKR, and various industrial appliions

Professional installation required. Proper assembly is critical for engine reliability:

1. Disconnect battery - Disconnect the negative battery cable before beginning work
2. Drain engine oil and coolant - Drain fluids as necessary
3. Remove the cylinder head - Remove the cylinder head for access to the piston and connecting rod
4. Remove the oil pan - Remove the oil pan for access to the crankshaft and connecting rod bolts
5. Remove the old connecting rod - Mark the cylinder position, remove the connecting rod cap, and carefully push the piston/rod assembly out
6. Inspect the crankshaft journal - Check for wear, scoring, or damage; polish or replace if necessary
7. Inspect the piston pin - Check for wear or damage; replace if necessary
8. Clean thoroughly - Clean all components and oil passages
9. Prepare the new connecting rod - Inspect the new rod and verify it matches the original
10. Install new bearings - Install new connecting rod bearings (upper and lower)
11. Install the piston and rod assembly - Carefully install the piston/rod assembly into the cylinder
12. Install the connecting rod cap - Install the rod cap and torque bolts to manufacturer specifiion
13. Check bearing clearance - Verify bearing clearance using plastigauge (per service manual)
14. Reinstall the oil pan - Install the oil pan with a new gasket
15. Reinstall the cylinder head - Install the cylinder head with a new head gasket
16. Refill fluids - Refill with the correct type and grade of engine oil and coolant
17. Reconnect battery - Reconnect the negative battery cable
18. Start the engine - Start the engine and check for unusual noise or vibration
19. Break-in procedure - Follow the manufacturer's recommended break-in procedure

• Material Verifiion: Confirms forged alloy steel composition meets OE strength and durability specifiions
• Dimensional Inspection: Center-to-center length, big end bore, small end bore, and overall dimensions verified against OEM tolerances
• Surface Finish Inspection: Bearing surfaces checked for proper finish and roundness
• Hardness Testing: Material hardness verified for wear resistance and durability
• Crack Detection: Non-destructive testing for forging defects or cracks
• Visual Inspection: 100% checked for defects, machining flaws, or damage
• Packaged Safely: Protected and securely packaged to prevent damage during 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

For pricing, availability, or bulk purchase of the Connecting Rod Assembly 8-98013962-0 For ISUZU 4JB1 TFR55 Engine 8980139620 8980132902, please contact our sales team for a competitive quote and expert technical support.