8-94438-981-0 Isuzu 4JA1 Engine Piston 93mm Bore 31mm Pin 92.5mm Height for TF Pickup Rodeo

Product Details

Product Overview

This high-performance diesel engine piston is a direct replacement for the Isuzu 4JA1 and 4JA1-T engine platforms. Designed with precision engineering, this piston features a 93.00mm bore diameter, a 31.00mm pin diameter, and a total height of 92.50mm, matching the specifications required for reliable engine rebuilds and overhauls.

Commonly used for the Isuzu TF Pickup, Rodeo, Campo, KB250, and JMC Baodian models, this component is a critical part for maintaining compression and combustion efficiency in turbocharged and naturally aspirated 4JA1 diesel engines. The OEM reference number 8-94438-981-0 confirms its compatibility with original Isuzu specifications, ensuring a precise fit for your aftermarket replacement needs.

Key Features & Benefits

• Precise Fitment: Engineered to OEM specifications with a 93.00mm bore, 31.00mm pin diameter, and 92.50mm height for direct bolt-in replacement in 4JA1 and 4JA1-T engines.
• High-Silicon Aluminum Alloy: Manufactured from premium high-silicon aluminum alloy, providing excellent thermal conductivity, reduced weight, and superior resistance to thermal fatigue under high-load diesel operation.
• Advanced Surface Treatment: Features tin-plated surfaces, an anodized top ring land, and a graphite skirt coating to reduce friction, improve scuff resistance, and optimize oil control during break-in and long-term use.
• Optimized Ring Grooves: Precision-machined ring grooves (top: 2.0mm, 2nd: 2.0mm, oil: 5.0mm) ensure proper ring sealing and oil management, reducing blow-by and improving engine efficiency.
• Durability for Turbo Applications: Designed to withstand the increased cylinder pressures and temperatures of the 4JA1-T turbo diesel, offering reliable performance in both naturally aspirated and forced induction configurations.
• Complete Aftermarket Solution: Supplied as a single piston unit, ideal for individual cylinder replacement or full engine rebuild kits for Isuzu and JMC diesel applications.

Technical Specifications

OEM Cross-Reference

This piston is a direct aftermarket replacement for the following original equipment manufacturer (OEM) part numbers. Verify your existing part number for compatibility before ordering.

• Isuzu OEM: 8-94438-981-0, 8-97176-633-0
• Cross References: Compatible with Isuzu 4JA1 and 4JA1-T engine service parts.

Compatibility

This piston is commonly used for the following engine models and vehicle applications. Fitment is inferred based on the 4JA1 engine platform. Always verify with your engine block casting number or existing piston part number.

• Engine Models: Isuzu 4JA1 (Naturally Aspirated), 4JA1-T (Turbocharged)
• Vehicle Applications: Isuzu TF Pickup, Isuzu Rodeo, Isuzu Campo, Isuzu KB250, JMC Baodian
• Additional Applications: Commonly found in various Isuzu and JMC light trucks and utility vehicles equipped with the 4JA1 diesel engine.

Global Supply & Distribution

We offer worldwide shipping and export services for this 4JA1 engine piston, ensuring fast and reliable delivery to major markets across the globe. Our logistics network supports air freight, sea freight (FCL/LCL), and express courier services.

• North America: Fast delivery to Los Angeles, Houston, New York, and Toronto ports.
• Europe: Efficient shipping to Rotterdam, Hamburg, and Felixstowe for distribution across the EU.
• Asia-Pacific: Direct routes to major hubs in Singapore, Dubai, Sydney, and Tokyo.
• Middle East & Africa: Reliable service to Jebel Ali (Dubai), Jeddah, and Durban.
• South America: Shipping available to Santos, Buenos Aires, and Valparaiso.

As a supplier based in Guangdong, China, we have extensive export experience and comply with international trade documentation requirements. We welcome bulk orders, OEM inquiries, and distributor partnerships.

Quality Assurance

Every piston undergoes rigorous quality control to meet aftermarket standards. Our manufacturing process emphasizes dimensional accuracy and material integrity.

• Manufacturing Standards: Produced in ISO-compliant facilities with precision CNC machining.
• Testing: Machinery test reports and outgoing inspection videos are provided upon request to verify specifications.
• Warranty: Backed by a 6-month warranty against manufacturing defects in materials and workmanship.
• Certification: Products are tested for hardness, dimensional tolerance, and surface finish consistency.

FAQ

Q1: Will this piston fit my Isuzu 4JA1-T turbo engine?
A: Yes, this piston (93.00mm bore, 92.50mm height) is designed for both the naturally aspirated 4JA1 and the turbocharged 4JA1-T engine. The high-silicon aluminum alloy and graphite skirt coating provide the necessary durability for turbo applications. However, always verify your existing piston part number (8-94438-981-0 or 8-97176-633-0) to confirm compatibility before purchase.

Q2: What is the correct installation clearance for this piston?
A: For optimal performance, we recommend following the standard Isuzu 4JA1 service manual specifications. Typical piston-to-cylinder wall clearance for this high-silicon alloy piston is between 0.03mm and 0.05mm. The ring end gaps should be set according to the manufacturer’s guidelines for the 2.0mm/2.0mm/5.0mm ring grooves. Always use a proper ring compressor during installation to avoid damaging the graphite skirt coating.

Q3: Can I use this piston for a complete engine rebuild on a JMC Baodian?
A: Yes, this piston is commonly used for the JMC Baodian, which shares the 4JA1 engine platform. For a complete rebuild, you will need to order the correct quantity (typically 4 pistons for a 4-cylinder engine) and pair them with matching piston rings, cylinder liners, and bearings. We recommend using genuine or high-quality aftermarket parts from the same production batch to ensure balanced weight and uniform compression ratios across all cylinders.