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Yimi (Guangzhou) Automotive Parts Co, Ltd

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China Standard Piston 8-97183666-0 8971836660 For ISUZU NPR NQR NKR 4HG1 4HG1T 4.6L —
China Standard Piston 8-97183666-0 8971836660 For ISUZU NPR NQR NKR 4HG1 4HG1T 4.6L —

  1. China Standard Piston 8-97183666-0 8971836660 For ISUZU NPR NQR NKR 4HG1 4HG1T 4.6L —
  2. China Standard Piston 8-97183666-0 8971836660 For ISUZU NPR NQR NKR 4HG1 4HG1T 4.6L —
  3. China Standard Piston 8-97183666-0 8971836660 For ISUZU NPR NQR NKR 4HG1 4HG1T 4.6L —
  4. China Standard Piston 8-97183666-0 8971836660 For ISUZU NPR NQR NKR 4HG1 4HG1T 4.6L —

Standard Piston 8-97183666-0 8971836660 For ISUZU NPR NQR NKR 4HG1 4HG1T 4.6L —

  1. MOQ: 4 pcs
  2. Price: Negotiable
  3. Get Latest Price
OEM Part Number 8-97183666-0 / 8971836660
Vehicle Models ISUZU NPR, NQR, NKR, NHR (2000–2016)
Piston Diameter 115 mm
Warranty 1 Year (standard replacement warranty)
Engine Compatibility ISUZU 4HG1 / 4HG1T (4.6L, naturally aspirated & turbocharged)
Construction Features Alfin insert, oil gallery
Delivery Time 5-8 Work Days
Certifiion ISO/TS16949
Supply Ability 4000 pcs/month
Material Aluminum alloy with Alfin insert
Surface Treatment Tin coating
Part Name Standard Engine Piston (with pin & clip options)
Ring Groove (Top / 2nd / Oil) 3.0 mm (3.0K) / 2.5 mm / 4.0 mm
Payment Terms T/T
Packaging Details Neutral Package or as customers’ request
Total Height 104.4–104.5 mm
Compression Height (KH) 60.7 mm
Piston Pin Diameter 36 × 79 mm
Combustion Chamber Ф51.6 mm
Condition Brand New — 100% quality inspected
Model Number ISUZU NPR NQR NKR 4HG1 4HG1T
Certification ISO/TS16949
Brand Name YIMI
Place of Origin China

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  1. Product Details
  2. Company Details

Product Specification

OEM Part Number 8-97183666-0 / 8971836660 Vehicle Models ISUZU NPR, NQR, NKR, NHR (2000–2016)
Piston Diameter 115 mm Warranty 1 Year (standard replacement warranty)
Engine Compatibility ISUZU 4HG1 / 4HG1T (4.6L, naturally aspirated & turbocharged) Construction Features Alfin insert, oil gallery
Delivery Time 5-8 Work Days Certifiion ISO/TS16949
Supply Ability 4000 pcs/month Material Aluminum alloy with Alfin insert
Surface Treatment Tin coating Part Name Standard Engine Piston (with pin & clip options)
Ring Groove (Top / 2nd / Oil) 3.0 mm (3.0K) / 2.5 mm / 4.0 mm Payment Terms T/T
Packaging Details Neutral Package or as customers’ request Total Height 104.4–104.5 mm
Compression Height (KH) 60.7 mm Piston Pin Diameter 36 × 79 mm
Combustion Chamber Ф51.6 mm Condition Brand New — 100% quality inspected
Model Number ISUZU NPR NQR NKR 4HG1 4HG1T Certification ISO/TS16949
Brand Name YIMI Place of Origin China
High Light Isuzu NPR diesel engine piston ,OEM direct fit 115mm piston ,Alfin oil-gallery piston 4HG1
Standard Piston 8-97183666-0 8971836660 For ISUZU NPR NQR NKR 4HG1 4HG1T 4.6L — Verified OEM Direct Fit, 115mm STD Alfin Oil-Gallery Diesel Engine Piston
Product Overview

The Engine Piston with OEM numbers 8-97183666-0 / 8971836660 is a verified direct-fit replacement for ISUZU NPR, NQR, and NKR series trucks equipped with the 4HG1 / 4HG1T (4.6L) diesel engine. This critical reciprocating component converts combustion pressure into crankshaft rotation and manages thermal load within the cylinder.

Part Number: 8-97183666-0 8971836660
Vehicle Model: ISUZU NPR NQR NKR
Engine Model: ISUZU 4HG1 4HG1T
Condition: 100% Brand New
Size: Standard 115mm
Key Specifications:
  • Piston Diameter: 115 mm
  • Compression Height: 60.7 mm
  • Pin Diameter: 36 × 79 mm
  • Total Height: 104.4 - 104.5 mm
  • Combustion Chamber: Ф51.6 mm
  • Ring Grooves: 3.0 mm (top, Keystone) / 2.5 mm (second) / 4.0 mm (oil control)
ISUZU 4HG1 Engine Piston - Standard 115mm Alfin Oil-Gallery Design
Vehicle & Engine Compatibility
Brand Model / Series Engine Years
ISUZU NPR 4HG1 / 4HG1T 2000-2016
ISUZU NPR71 4HG1 1996-2002
ISUZU NQR 4HG1 1997-2016
ISUZU NQR71 4HG1 1996-2002
Chevrolet NPR / NQR / NNR 4HG1 1999-2012
Important Fitment Notes:
  • Confirm engine variant: 4HG1 (naturally aspirated) vs. 4HG1T (turbocharged)
  • Verify piston-to-bore clearance and valve-to-piston clearance against ISUZU workshop manual
  • 4HG1-T engines are known for tight valve clearances that can cause piston contact
  • Piston rings and pin are not included unless specified
Features & Benefits
Alfin Insert
Reinforces top ring groove against thermal fatigue and micro-welding
Oil Gallery Construction
Improves heat dissipation from crown and ring zone, reducing scuffing risk
Tin Coating
Enhances break-in characteristics and reduces friction during initial operation
Precision Ring Grooves
Ensures correct ring seating and sealing to restore compression
115mm STD Diameter
Direct-fit replacement for original bore without machining
4-Cylinder Application
Matched to 4HG1's 4-cylinder configuration for balanced performance
Failure Symptoms - When to Replace
  • Loss of engine compression: Worn or stuck piston rings reduce cranking pressure
  • Excessive exhaust smoke: Blue/white/black smoke indicates oil passing rings or incomplete combustion
  • Increased oil consumption: Glazed bores or tired ring packs allow oil into combustion chamber
  • Piston-to-valve contact: 4HG1-T engines are known for interference when valve clearances aren't maintained
  • Knocking or tapping noise: Piston slap or bearing wear requiring inspection
Quality Control & Verification
QC Item Verification Method
Piston diameter / ovality CMM dimensional inspection against OEM drawing
Ring groove width & depth Go/no-go gauge verification
Pin bore diameter & concentricity Precision bore gauge
Material chemistry Spectrometer analysis (aluminum alloy composition)
Surface treatment thickness Tin coating thickness measurement
Weight consistency Batch weighing tolerance control

Manufacturing conforms to ISO/TS16949 quality management system standards. Each unit undergoes 100% quality inspection before packaging.

Installation & Maintenance
IMPORTANT: Professional engine rebuild experience required. Always refer to the ISUZU 4HG1 workshop manual for complete specifications. Improper installation can result in engine damage and serious injury.

Installation Guidelines:

  1. Verify fitment: Confirm piston diameter, compression height, and ring groove dimensions
  2. Check piston-to-bore clearance: Measure cylinder liner bore and piston skirt diameter
  3. Check valve-to-piston clearance: Verify thermal clearances within specification
  4. Ring installation: Install rings with correct orientation; stagger ring end gaps at 120° intervals
  5. Pin & clip installation: Lubricate pin bore and install piston pin; secure with new snap rings

Maintenance Schedule:

  • Inspect compression and oil consumption every 50,000 km or annually
  • Replace piston rings and inspect pistons during any top-end overhaul
  • Monitor valve clearances - 4HG1 is sensitive to thermal valve clearance adjustments
  • After 400,000 km, inspect for cylinder ellipticity and piston wear
Packaging & Supply
  • Standard packing: Corrugated carton with anti-rust paper; 4 pcs in one box
  • Set options: Piston only, or piston set with pin & clips
  • Suitable for: Engine rebuild workshops, fleet maintenance, spare parts distributors
  • Related parts available: Piston ring sets, cylinder liner kits, piston pins, and full overhaul kits

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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