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Yimi (Guangzhou) Automotive Parts Co, Ltd

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China High-Temperature Alloy Exhaust Valve with Stellite-Faced Tip and Precision
China High-Temperature Alloy Exhaust Valve with Stellite-Faced Tip and Precision

  1. China High-Temperature Alloy Exhaust Valve with Stellite-Faced Tip and Precision
  2. China High-Temperature Alloy Exhaust Valve with Stellite-Faced Tip and Precision

High-Temperature Alloy Exhaust Valve with Stellite-Faced Tip and Precision

  1. MOQ: 10 pcs
  2. Price: Negotiable
  3. Get Latest Price
Payment Terms T/T,Western Union
Supply Ability 10000 pcs/month
Delivery Time 5-8 Work Days
Packaging Details Neutral Package or as customers’ request
Part Number 8-94247875-2, 8942478752
Head Diameter 32-36mm
Stem Diameter 8mm
Tip Treatment Hardened / Stellite-faced
Material High-alloy heat-resistant steel (21-4N or equivalent)
Stem Hardness HRC 50-55
Stem Roughness Ra ≤ 0.2 μm
Stem Runout ≤ 0.05mm
Brand Name YIMI
Model Number ISUZU
Certification ISO/TS16949
Place of Origin China

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  1. Product Details
  2. Company Details

Product Specification

Payment Terms T/T,Western Union Supply Ability 10000 pcs/month
Delivery Time 5-8 Work Days Packaging Details Neutral Package or as customers’ request
Part Number 8-94247875-2, 8942478752 Head Diameter 32-36mm
Stem Diameter 8mm Tip Treatment Hardened / Stellite-faced
Material High-alloy heat-resistant steel (21-4N or equivalent) Stem Hardness HRC 50-55
Stem Roughness Ra ≤ 0.2 μm Stem Runout ≤ 0.05mm
Brand Name YIMI Model Number ISUZU
Certification ISO/TS16949 Place of Origin China
High Light Isuzu exhaust valve with Stellite tipHigh-temperature alloy exhaust valve for Isuzu NKRPrecision-ground stem exhaust valve 6BD1 4JA1
Exhaust Valve 8-94247875-2 For Isuzu NKR 6BD1 4JA1 4JB1 8942478752 Isuzu Truck Accessories
Product Overview

The Exhaust Valve (OEM Numbers: 8-94247875-2 / 8942478752) is a premium-quality, direct replacement engine valvetrain component designed for Isuzu NKR light/medium-duty trucks equipped with 6BD1, 4JA1, or 4JB1 diesel engines.

Part Number 8-94247875-2, 8942478752
Product Name Exhaust Valve / Engine Exhaust Valve
Car Model ISUZU NKR
Engine Model ISUZU 6BD1 (5.8L), 4JA1 (2.5L), 4JB1 (2.8L) Diesel
Condition 100% Brand New
Origin China Mainland
Main Market Middle East, Asia, Africa, South America, North America & Europe
Warranty 6 Months
Exhaust Valve 8-94247875-2 for Isuzu NKR diesel engines
Features & Advantages
  • OE Quality: Manufactured to Isuzu dimensional and material specifications for perfect fit and long service life
  • High-Temperature Alloy: 21-4N or equivalent steel resists oxidation, creep, and thermal fatigue
  • Stellite-Faced Tip: Hardfacing on the valve tip reduces wear from rocker arm contact
  • Precision-Ground Stem: Smooth surface reduces guide wear and ensures proper oil control
  • Hardened Valve Face: Provides durable sealing against the valve seat, preventing gas leakage
  • Restores Engine Performance: Eliminates compression loss, rough idle, and excessive exhaust smoke
  • Direct Replacement: Matches OE length, head diameter, and stem size - no modification required
  • Cost-Effective: Affordable alternative to genuine OEM without compromising quality
Vehicle & Engine Compatibility

This exhaust valve is specifically designed for Isuzu NKR trucks with 6BD1, 4JA1, or 4JB1 engines.

Isuzu Truck Models:
  • ISUZU NKR (NKR55, NKR57, NKR59, NKR71, etc.)
  • ISUZU NPR (select models with these engines - verify)
Engine Specifications:
Engine Displacement Cylinders Application
6BD1 5.8L (5785cc) Inline 6 Heavy duty
4JA1 2.5L (2499cc) Inline 4 Light duty
4JB1 2.8L (2771cc) Inline 4 Light/medium duty
Installation Notes

Installation steps (overview for OHV engine):

  1. Remove cylinder head - as per engine service manual
  2. Clean cylinder head - remove carbon deposits from valve ports and combustion chamber
  3. Remove old exhaust valves - use valve spring compressor to release keepers, remove spring, and pull out valve
  4. Inspect valve guides - measure stem-to-guide clearance. Replace guides if worn
  5. Inspect valve seats - grind or cut seats to proper angle and width
  6. Lubricate new valve stem - with engine oil or assembly lube
  7. Insert new exhaust valve - into the guide from the combustion chamber side
  8. Install valve spring, retainer, and keepers - compress spring and secure keepers
  9. Lap the valve (if necessary) - apply lapping compound and rotate valve against seat to ensure sealing
  10. Check installed height - measure valve spring height; adjust with shims if needed
  11. Reinstall cylinder head - with new head gasket. Torque head bolts to specification
  12. Adjust valve clearance - set exhaust valve lash to OE specification (typically 0.35-0.45mm cold for these engines)
  13. Start engine - check for smooth operation and correct valve train noise
Quality Control
  • Material Verification: Alloy composition tested via spectrometer
  • Dimensional Inspection: Head diameter, stem diameter, overall length, and keeper groove position verified against OE blueprints
  • Hardness Testing: Tip hardness (HRC 50-55) and stem hardness checked
  • Surface Finish Inspection: Stem surface roughness measured (Ra ≤ 0.2 μm)
  • Straightness Test: Valve stem runout checked (≤ 0.05mm)
  • Visual Inspection: 100% checked for cracks, burrs, or surface defects
  • Packaged Safely: Valve wrapped in protective plastic or oiled paper, boxed individually or in sets
Packaging and 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
Inquiry

For pricing, availability, or bulk purchase of the Exhaust Valve 8-94247875-2 For Isuzu NKR 6BD1 4JA1 4JB1 8942478752 Isuzu Truck Accessories, please contact our sales team for a competitive quote and expert technical support.

Company Details

Bronze Gleitlager

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 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 automotiv... 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 automotiv...

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Get in touch with us

  • Reach Us
  • Yimi (Guangzhou) Automotive Parts Co, Ltd
  • 4F, 7th, No. 2, South Jinguu Road, Huadong Town, Huadu District, Guangzhou City
  • https://www.isuzucarsparts.com/

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