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Yimi (Guangzhou) Automotive Parts Co, Ltd

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China Forged Steel Rocker Arm with Corrosion-Resistant Coating and Hardened Contact
China Forged Steel Rocker Arm with Corrosion-Resistant Coating and Hardened Contact

  1. China Forged Steel Rocker Arm with Corrosion-Resistant Coating and Hardened Contact
  2. China Forged Steel Rocker Arm with Corrosion-Resistant Coating and Hardened Contact

Forged Steel Rocker Arm with Corrosion-Resistant Coating and Hardened Contact

  1. MOQ: 10 pcs
  2. Price: Negotiable
  3. Get Latest Price
Supply Ability 10000 pcs/month
Delivery Time 5-8 Work Days
Surface Treatment Corrosion-resistant coating
Engine Model ISUZU 4JJ1 (3.0L Turbo Diesel)
Hardness HRC 50-55
Part Number 8-98025059-4, 8980250594
Material Forged steel / ductile iron, hardened pad
Vehicle Model ISUZU NKR, NPR
Valve Lash 0.25-0.35mm cold
Engine Displacement 3.0L (2999cc)
Certifiion ISO/TS16949
Payment Terms T/T,
Packaging Details Neutral Package or as customers’ request
Model Number ISUZU NKR, NPR
Brand Name YIMI
Place of Origin China

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  1. Product Details
  2. Company Details

Product Specification

Supply Ability 10000 pcs/month Delivery Time 5-8 Work Days
Surface Treatment Corrosion-resistant coating Engine Model ISUZU 4JJ1 (3.0L Turbo Diesel)
Hardness HRC 50-55 Part Number 8-98025059-4, 8980250594
Material Forged steel / ductile iron, hardened pad Vehicle Model ISUZU NKR, NPR
Valve Lash 0.25-0.35mm cold Engine Displacement 3.0L (2999cc)
Certifiion ISO/TS16949 Payment Terms T/T,
Packaging Details Neutral Package or as customers’ request Model Number ISUZU NKR, NPR
Brand Name YIMI Place of Origin China
High Light Forged Steel Rocker Arm for Isuzu 4JJ1 ,Corrosion-Resistant Rocker Arm Isuzu Truck ,Hardened Contact Pad Rocker Arm 4JJ1
Rocker Arm 8-98025059-4 For Isuzu 4JJ1 NKR NPR Engine 8980250594 Isuzu Truck Spare Parts
Product Overview

The Rocker Arm (OEM Numbers: 8-98025059-4 / 8980250594) is a premium-quality, direct replacement valvetrain component designed for Isuzu NKR and NPR series medium-duty trucks equipped with the 4JJ1 diesel engine.

Part Number: 8-98025059-4, 8980250594
Product Name: Rocker Arm / Valve Rocker Arm
Car Model: ISUZU NKR, NPR
Engine Model: ISUZU 4JJ1 (3.0L Turbo Diesel)
Condition: 100% Brand New
Material: High-strength aluminum alloy & precision bearings
Warranty: 6 Months
Isuzu Rocker Arm 8-98025059-4 for 4JJ1 Engine
Function & Features

Function: Transfers motion from the camshaft or pushrod to the valve stem, opening and closing the engine valves at precise timing. Ensures efficient combustion and quiet valvetrain operation for Isuzu 4JJ1 diesel engines.

Key Advantages
  • OE Quality: Manufactured to Isuzu dimensional and material specifiions for perfect fit and reliable valve actuation
  • Hardened Contact Pad: Wear-resistant surface reduces friction and extends service life
  • Precision Pivot Bore: Smooth operation on the rocker shaft
  • Lightweight yet Strong: Forged construction minimizes reciproing mass
  • Restores Valvetrain Performance: Eliminates tapping noise, uneven valve lift, and power loss
  • Direct Replacement: Matches OE dimensions - simple installation
  • Cost-Effective: Affordable alternative to genuine OEM rocker arms
Vehicle Compatibility

This rocker arm is specifically designed for Isuzu NKR and NPR trucks with 4JJ1 engine.

Isuzu Truck Models:
  • ISUZU NKR (NKR55, NKR57, NKR59, NKR71 with 4JJ1)
  • ISUZU NPR (NPR66, NPR70, NPR71, NPR75 with 4JJ1)
  • Also fits Isuzu D-MAX, MU-X with 4JJ1 (verify)
Engine Specifiion - ISUZU 4JJ1:
  • 4-Cylinder, Inline Diesel, DOHC, Common Rail, Turbocharged
  • Displacement: 3.0L (2999cc)
Installation Guide

Installation steps (overview for OHV engine):

  1. Remove valve cover and any related components
  2. Remove the rocker shaft assembly or individual rocker arm (depending on design)
  3. Inspect the rocker shaft and pushrod for wear
  4. Lubrie the new rocker arm's pivot bore and pad with engine assembly lube
  5. Install the new rocker arm onto the shaft or pedestal. Ensure proper orientation (intake/exhaust)
  6. Torque the rocker arm shaft bolts or adjustment nut to specifiion
  7. Adjust valve lash to OE specifiion (typically 0.25-0.35mm cold for 4JJ1)
  8. Install new valve cover gasket and reassemble
  9. Start engine and check for abnormal noise
  10. Re-check valve lash after warm-up if required
Quality Assurance
  • Material Verifiion: Forged steel alloy composition and hardness tested
  • Dimensional Inspection: Pad radius, pivot bore diameter, and overall length verified
  • Hardness Testing: Pad hardness (HRC 50-55) and core hardness checked
  • Visual Inspection: 100% checked for forging defects, burrs, or surface flaws
  • Packaged Safely: Wrapped in protective oil 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
  • Shipping by Express Air or Sea
Contact Information

For pricing, availability, or bulk purchase of the Rocker Arm 8-98025059-4 For Isuzu 4JJ1 NKR NPR Engine 8980250594 Isuzu Truck Spare Parts, please contact our sales team for a competitive quote and expert technical support.

Company Details

Bronze Gleitlager

,

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 and 

Graphite Plugged Bushings

 from Quality China Factory
  • Business Type:

    Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller

  • Year Established:

    2005

  • Total Annual:

    8000000-10000000

  • Employee Number:

    100~150

  • Ecer Certification:

    Verified Supplier

Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...

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Get in touch with us

  • Reach Us
  • Yimi (Guangzhou) Automotive Parts Co, Ltd
  • Unit 1313, Building 5, Changsheng DDP Fashion Center, No. 17 Dachi Road, Tancun, Shijing Subdistrict, Baiyun District, Guangzhou City.
  • https://www.isuzucarsparts.com/

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