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Yimi (Guangzhou) Automotive Parts Co, Ltd

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China Piston Oil Jet 8-94370579-1 8943705791 For ISUZU NPR66 4HF1 Diesel Engine
China Piston Oil Jet 8-94370579-1 8943705791 For ISUZU NPR66 4HF1 Diesel Engine

  1. China Piston Oil Jet 8-94370579-1 8943705791 For ISUZU NPR66 4HF1 Diesel Engine
  2. China Piston Oil Jet 8-94370579-1 8943705791 For ISUZU NPR66 4HF1 Diesel Engine

Piston Oil Jet 8-94370579-1 8943705791 For ISUZU NPR66 4HF1 Diesel Engine

  1. MOQ: 10 pcs
  2. Price: Negotiable
  3. Get Latest Price
Mounting Type Press-Fit or Bolt-On to Engine Block (as per OE)
Delivery Time 5-8 Work Days
Orifice Precision-Drilled for Correct Oil Flow
Payment Terms T/T
Part Name Piston Oil Jet / Piston Cooling Jet / Oil Spray Nozzle / JET; OIL,PISTON
Material High-Quality Steel
Engine Application ISUZU 4HF1 (4.3L) Diesel Engine
Packaging Details Neutral Package or as customers’ request
Position Engine Block – Piston Cooling Gallery
Fitment OEM Standard, Direct Replacement
Vehicle Application ISUZU NPR66 (also NK, NP model)
Supply Ability 10000 pcs/month
Part No 8-94370579-1, 8943705791
Net Weight 10 kg per piece (as per source data)
Condition Brand New
H/S Code 840999100
Model Number ISUZU NPR66 (also NK, NP model)
Brand Name YIMI
Place of Origin China
Certification ISO/TS16949

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  1. Product Details
  2. Company Details

Product Specification

Mounting Type Press-Fit or Bolt-On to Engine Block (as per OE) Delivery Time 5-8 Work Days
Orifice Precision-Drilled for Correct Oil Flow Payment Terms T/T
Part Name Piston Oil Jet / Piston Cooling Jet / Oil Spray Nozzle / JET; OIL,PISTON Material High-Quality Steel
Engine Application ISUZU 4HF1 (4.3L) Diesel Engine Packaging Details Neutral Package or as customers’ request
Position Engine Block – Piston Cooling Gallery Fitment OEM Standard, Direct Replacement
Vehicle Application ISUZU NPR66 (also NK, NP model) Supply Ability 10000 pcs/month
Part No 8-94370579-1, 8943705791 Net Weight 10 kg per piece (as per source data)
Condition Brand New H/S Code 840999100
Model Number ISUZU NPR66 (also NK, NP model) Brand Name YIMI
Place of Origin China Certification ISO/TS16949
High Light Piston Oil Jet for ISUZU NPR66 ,ISUZU 4HF1 Diesel Engine part ,8943705791 oil jet piston
Piston Oil Jet 8-94370579-1 8943705791 For ISUZU NPR66 4HF1 Diesel Engine
Product Overview

The Piston Oil Jet (OEM Numbers: 8-94370579-1 / 8943705791) is a premium-quality, direct replacement engine component designed specifically for ISUZU NPR66 series medium-duty trucks equipped with 4HF1 diesel engines. This precision-engineered oil jet directs a stream of pressurized oil onto the underside of the piston crown for essential cooling and lubrication.

Part Number 8-94370579-1, 8943705791
Product Name Piston Oil Jet / Piston Cooling Jet / Oil Spray Nozzle
Car Model ISUZU NPR66 (also NK, NP model)
Engine Model ISUZU 4HF1 (4.3L) Diesel Engine
Condition 100% Brand New
Material High-strength aluminum alloy & precision bearings
Piston Oil Jet component for ISUZU 4HF1 diesel engine
Features & Advantages
  • OE Quality: Manufactured to strict ISUZU dimensional and material specifications for perfect fit and function
  • Precision Orifice: Delivers correct oil flow rate and spray pattern for optimal piston cooling
  • Durable Steel Construction: Withstands high oil pressure, temperature, and vibration
  • Restores Piston Cooling: Eliminates overheating, scuffing, and seizure caused by clogged or damaged jets
  • Direct Replacement: Matches OE jet dimensions and mounting configuration
  • Long Service Life: Engineered for heavy-duty diesel engine applications
  • Essential for Engine Overhaul: Critical component to replace during piston or block service
  • Reliable Performance: Ensures proper lubrication and cooling for extended engine life
Piston Oil Jet installation and application details
Vehicle & Engine Compatibility

This piston oil jet is specifically designed for ISUZU medium-duty trucks and commercial vehicles:

  • ISUZU NPR66 (Medium-Duty Trucks)
  • ISUZU N Series (NK, NP - as applicable)
  • ISUZU 4HF1 Engine Specifications:
    • 4-Cylinder, Inline Diesel
    • Displacement: 4.3L
    • Valvetrain: OHV
    • Application: Medium-duty trucks and commercial vehicles

Also compatible with various ISUZU models using the 4HF1 engine with the same piston cooling jet configuration.

Installation Notes

Professional engine builder installation recommended:

  1. Drain engine oil - Drain oil to prevent spills during component removal
  2. Remove the oil pan - Remove the oil pan to access the piston oil jets
  3. Locate the oil jets - Identify the piston cooling jets and note their orientation
  4. Remove the old oil jet - Carefully remove the old jet from the engine block
  5. Clean the mounting area - Remove dirt, debris, and old sealant from the jet bore
  6. Inspect oil galleries - Ensure all oil passages are clear and free from sludge
  7. Install the new oil jet - Press or thread the new jet into position with correct orientation
  8. Torque if applicable - Tighten to manufacturer torque specifications if threaded
  9. Check clearance - Ensure the jet does not contact moving parts
  10. Reinstall oil pan - Install new oil pan gasket and reinstall pan with proper torque
  11. Refill with engine oil - Fill with correct grade and quantity of engine oil
  12. Start and check - Start engine; check oil pressure warning light and inspect for leaks
Quality Control
  • Material Verification: Confirms steel composition meets ISUZU strength specifications
  • Dimensional Inspection: Jet dimensions and mounting points verified within OEM tolerances
  • Flow Testing: Sample tested to ensure correct oil flow rate and spray pattern
  • Pressure Testing: Sample tested for integrity under operating oil pressure
  • Visual Inspection: 100% checked for cracks, burrs, or manufacturing defects
  • Packaged Safely: Protected and packaged to prevent damage during transit
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

For pricing, availability, or bulk purchase of the Piston Oil Jet 8-94370579-1 8943705791 For ISUZU NPR66 4HF1 Diesel Engine, 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

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  • 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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