Rocker Arm Assembly for Isuzu CXZ51 6WF1 6WG1 with Induction-hardened Shaft and Precision-drilled Oil Passages

The Rocker Arm Assembly (OEM Numbers: 1-12610080-0 / 1126100800) is a premium-quality, direct replacement valvetrain component designed for Isuzu CXZ51 heavy-duty trucks equipped with 6WF1 or 6WG1 diesel engines.

Function: Transfers motion from the camshaft or pushrods to the valves, opening and closing them at precise timing. Ensures proper engine breathing and valvetrain reliability for Isuzu 6WF1/6WG1 diesel engines.

• OE Quality: Manufactured to Isuzu dimensional and material specifications for perfect fit and reliable valve actuation
• Precision Ground Shaft: Smooth, hardened surface reduces wear on rocker arm bushings
• Integrated Oil Passages: Ensures consistent lubrication to all rocker arm pivot points
• Complete Assembly: Includes shaft, rocker arms, springs, and retainers - ready to install
• Heat-Treated: Induction-hardening provides wear resistance (HRC 50-55) while maintaining core toughness
• Restores Valvetrain Performance: Eliminates tapping noise, uneven valve lift, and oil pressure loss
• Direct Replacement: Matches OE bore spacing, mounting holes, and oil feed alignment
• Cost-Effective: Affordable alternative to genuine OEM assemblies

Isuzu Truck Models:

• ISUZU CXZ51 (heavy-duty truck, 6×4 or 8×4)
• ISUZU CYZ51, EXZ51 (select models with same valvetrain - verify)

Engine Specifications:

1. Remove valve cover and any related components
2. Remove old rocker arm shaft assembly - unbolt the rocker shaft pedestal bolts in a sequence (loosen gradually). Lift the shaft with rocker arms attached
3. Inspect pushrods and lifters - replace if worn
4. Clean cylinder head mating surface - remove old gasket material
5. Lubricate new rocker arm shaft - apply engine assembly lube to the shaft and rocker arm bushings
6. Install new assembly - position on the cylinder head with pushrods aligned in the rocker arm sockets. Torque pedestal bolts to specification (typically 35-45 Nm for 6WF1/6WG1) in sequence
7. Adjust valve lash - set intake and exhaust clearances to OE specification (typically 0.25-0.35mm cold for Isuzu large engines)
8. Install new valve cover gasket - torque cover bolts
9. Start engine - check for abnormal noise and oil leaks
10. Re-check valve lash after warm-up - if required

• Material Verification: Ensures metal brackets meet strength and corrosion-resistance standards
• Damping Element Testing: Confirms proper elasticity and fluid integrity (where applicable)
• Dimensional Accuracy: Verified against OE specifications for precise fit
• Visual Inspection: 100% checked for cracks, defects, or manufacturing imperfections
• Packaged Safely: Protected 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