Rocker Arm Shaft with HRC 50-55 Hardness and Anti-corrosion Coating for Isuzu NKR55 4JB1 Engine - Direct OEM Replacement

Name: Rocker Arm Shaft with HRC 50-55 Hardness and Anti-corrosion Coating for Isuzu NKR55 4JB1 Engine - Direct OEM Replacement
Brand: Yimi (Guangzhou) Automotive Parts Co, Ltd
SKU: ISUZU NKR55
Availability: InStock

Basic Properties

Place of Origin: China

Brand Name: YIMI

Certification: ISO/TS16949

Model Number: ISUZU NKR55

Trading Properties

Minimum Order Quantity: 10 pcs

Price: Negotiable

Payment Terms: T/T,

Supply Ability: 10000 pcs/month

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Specifications

Hardness:	HRC 50-55	Surface Treatment:	Anti-corrosion Coating
Part No:	8-97036197-0, 8970361970, 8-94152346-0, 8941523460	Material:	Hardened Steel (induction-hardened)
Engine Application:	ISUZU 4JB1 (2.8L Diesel)	Displacement:	2.8L (2771cc)
Valve Lash:	0.25-0.35mm Cold	Cooling Type:	Engine Coolant Circulation
High Light:	Rocker Arm Shaft for Isuzu NKR55 4JB1 Engine , HRC 50-55 hardened Rocker Arm Shaft , OEM replacement Rocker Arm Shaft with anti-corrosion coating

Product Description

Rocker Arm Shaft 8-97036197-0 For Isuzu NKR55 4JB1 Engine 8970361970 Truck Parts

Premium-quality direct replacement rocker arm shaft designed for Isuzu NKR55 light-duty trucks with 4JB1 diesel engine. Supports and aligns rocker arms while ensuring precise valve timing and quiet valvetrain operation.

Part Numbers	8-97036197-0, 8970361970, 8-94152346-0, 8941523460
Product Name	Rocker Arm Shaft / Rocker Shaft
Vehicle Model	ISUZU NKR55
Engine Model	ISUZU 4JB1 (2.8L Diesel)
Condition	100% Brand New
Material	High-strength aluminum alloy & precision bearings
Warranty	6 Months

Isuzu Rocker Arm Shaft component showing detailed construction and oil passages

Key Features & Advantages

OE Quality: Manufactured to Isuzu dimensional and material specifications
Precision Ground Shaft: Smooth, hardened surface reduces wear on rocker arm bushings
Induction-Hardened: HRC 50-55 surface hardness for excellent wear resistance
Integrated Oil Passages: Ensures proper lubrication to all rocker arm pivot points
Corrosion Protected: Coated to resist rust and environmental damage
Direct Replacement: Perfect fit with matching length, diameter, and mounting hole spacing
Cost-Effective: Affordable alternative to genuine Isuzu shafts

Close-up view of Isuzu rocker arm shaft showing manufacturing quality and surface finish

Vehicle & Engine Compatibility

Specifically designed for Isuzu NKR55 trucks with 4JB1 engine. May also fit other Isuzu models with 4JB1 engine (e.g., NPR, TFR) - verification recommended.

Engine Specification - ISUZU 4JB1

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

Installation Overview

Remove valve cover and rocker arm assembly
Remove old rocker arm shaft from pedestals
Clean cylinder head pedestal bores and new shaft
Lubricate new shaft with engine assembly lube
Slide new shaft through pedestals and rocker arms in correct orientation
Install retaining bolts and torque to specification
Adjust valve lash to OE specification (0.25-0.35mm cold for 4JB1)
Install new valve cover gasket and reassemble
Start engine and check for abnormal noise
Re-check valve lash after warm-up if required

Quality Control Standards

Material Verification: Steel alloy composition and hardness tested
Dimensional Inspection: Length, diameter, oil hole positions, and straightness verified
Hardness Testing: Surface hardness (HRC 50-55) confirmed
Oil Flow Test: Sample shaft tested for unrestricted oil passage
Visual Inspection: 100% checked for scratches, burrs, or heat treatment defects
Packaged Safely: Wrapped in oiled paper, sealed in plastic bag, boxed with foam

Packaging & Delivery

Neutral export packing or customized packaging available. Carton or wooden case for safe transportation. Fast delivery for stock items via Express Air or Sea.

Inquiries & Orders

For pricing, availability, or bulk purchase of the Rocker Arm Shaft 8-97036197-0, please contact our sales team for competitive quotes and expert technical support.