8-94391-696-0 8943916960 Isuzu 4HE1 4HE1-TC Engine Piston STD 110mm for NPR66 NPR70 Cylinder Block

Product Details

Product Overview

This high-quality diesel engine piston, referencing OEM numbers 8-94391-696-0 and 8943916960, is specifically designed for the Isuzu 4HE1 and 4HE1-TC engine platforms. Manufactured to standard (STD) size specifications with a diameter of 110mm, this piston is a critical component for cylinder block repair and overhaul.

Commonly used in Isuzu NPR66 and NPR70 series trucks, as well as the GMC W4500 and W5500 models, this component ensures reliable compression and combustion efficiency. Please verify your engine model and existing piston dimensions to confirm compatibility before purchase.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM specifications (8-94391-696-0 / 8943916960) for a direct fit and reliable performance in 4HE1 and 4HE1-TC diesel engines.
• Durable Material Construction: Constructed from a high-silicon aluminum alloy with an Alfin insert in the ring groove area, providing excellent heat resistance, reduced expansion, and long service life under high-load conditions.
• Standard Size (STD) Accuracy: Delivered at the standard 110.0mm diameter, ensuring proper cylinder wall clearance when used with a correctly honed or new cylinder bore.
• Optimized Pin Fit: Features a precise pin diameter of 40.0mm and a compression height of 87.0mm for correct wrist pin alignment and connecting rod geometry.
• Enhanced Combustion Efficiency: The piston design helps maintain optimal compression ratios, contributing to better fuel economy, reduced emissions, and consistent power output.
• Comprehensive Overhaul Support: An essential part for cylinder block repair, often used in conjunction with piston rings, liners, and bearings for a complete engine rebuild.

Technical Specifications

OEM Cross-Reference

This piston is a direct replacement for the following original equipment manufacturer (OEM) numbers. Always cross-check your old part for visual and dimensional match.

• Isuzu: 8-94391-696-0, 8943916960

Compatibility

Engine Applications:
This piston is commonly used for the Isuzu 4HE1, 4HE1-T, and 4HE1-TC diesel engines.

Vehicle Applications:
Commonly used for the following vehicle models (fitment is inferred based on engine platform; please verify your specific engine code):

• Isuzu NPR (NPR66, NPR70)
• Isuzu NQR
• Isuzu NPR-HD
• GMC W4500
• GMC W5500

Global Supply & Distribution

We maintain a robust global supply chain to serve B2B clients in key markets, including North America, Europe, Asia-Pacific, the Middle East, and South America. Our inventory management system ensures fast processing and dispatch.

Stock items like this STD piston are typically shipped within 3-7 business days. For bulk production orders, lead times are between 15-30 days. We offer reliable shipping via air freight, sea freight, and express couriers to major ports and industrial hubs worldwide. Our team has extensive experience in international trade documentation and compliance.

Quality Assurance

Every piston undergoes rigorous quality control checks to ensure dimensional accuracy and material integrity. We provide a Machinery Test Report and Video Outgoing Inspection upon request to verify part quality before shipment.

Manufactured in ISO-certified facilities in Guangdong, China, our pistons meet high industry standards for durability and performance. This product is backed by a warranty of 6 to 12 months (depending on the specific purchase agreement), covering manufacturing defects under normal operating conditions.

FAQ

Q1: How do I confirm this piston will fit my 4HE1 engine?
A: First, check the engine code on your valve cover or block to ensure it is a 4HE1, 4HE1-T, or 4HE1-TC. Then, measure your current piston diameter. It should be 110.0mm (STD). Finally, verify the pin diameter (40mm) and compression height (87mm) match your connecting rod assembly. If your block has been rebored, you may require an oversized piston.

Q2: What is included in the “Piston Kit”?
A: This listing is for the piston body itself. It includes the piston with the Alfin ring carrier. Please note that piston rings, wrist pins, and circlips are typically sold separately unless specified. We recommend ordering a complete piston ring set and wrist pin for a proper rebuild.

Q3: What is the recommended installation procedure for this piston?
A: Installation should be performed by a qualified diesel mechanic. Ensure the cylinder bore is clean, properly sized, and honed to the correct crosshatch pattern. Lubricate the piston and rings with clean engine oil during assembly. Use a proper ring compressor to install the piston into the cylinder without damaging the rings or piston skirt. Always torque the connecting rod bolts to the manufacturer’s specifications.