4987914 114mm Engine Piston Kit With Pin For Cummins QSL 6L ISL QSL9 6LTAA 8.9L Diesel Engine Spare

Product Details

Product Overview

This high-performance engine piston kit, identified by OEM part number 4987914, is a critical replacement component designed for a range of heavy-duty Cummins diesel engines. Specifically engineered for the 8.9-liter displacement platform, this 114mm bore piston with pin is commonly used in Cummins ISL, QSL9, and 6LTAA series engines. As a core internal engine part, it ensures reliable compression and power delivery for demanding applications.

Manufactured to strict tolerances, this piston kit is an ideal solution for overhauling or repairing excavators, heavy trucks, construction machinery, and generator sets powered by these Cummins models. The kit includes the piston, piston pin, and necessary retaining rings, providing a complete replacement solution for a single cylinder. This part is a direct cross-reference for multiple OEM numbers including 5302254, 4936496, 5267632, and 5255218, ensuring broad compatibility across various engine configurations.

Key Features & Benefits

• Precision Fitment: Manufactured to a precise 114.0mm bore diameter, ensuring correct clearance and compression ratio for the 8.9L Cummins engine family.
• Durable Material Construction: Combines a high-strength cast iron piston body with a premium aluminum alloy skirt, offering excellent thermal conductivity and wear resistance for extended service life.
• Complete Kit Assembly: Supplied as a full set (1 piston + 1 pin + retaining rings), reducing sourcing complexity and ensuring component compatibility.
• Rigorous Quality Control: Each piston undergoes dimensional inspection and material verification to meet or exceed OEM specifications, with a provided machinery test report for quality assurance.
• Enhanced Reliability: Designed to withstand the high combustion pressures and temperatures of turbocharged diesel engines, minimizing the risk of piston failure in heavy-duty cycles.
• Cost-Effective Alternative: Offers a high-quality aftermarket solution at a competitive price point compared to genuine OEM parts, without compromising on core performance.

Technical Specifications

OEM Cross-Reference

This piston kit is a direct replacement for the following OEM part numbers, providing flexibility for sourcing and inventory management:

• Primary: 4987914
• Alternates: 5302254, 4936496, 5267632, 5255218

Note: Always verify your existing part number against the list above to ensure correct fitment before purchase.

Compatibility

This piston kit is commonly used for the following engine models and applications. Please confirm your engine model and serial number for exact compatibility.

• Engine Models: Cummins ISL, QSL9, 6L, 6LTAA, ISC (8.9L displacement)
• Vehicle/Equipment Applications: Heavy Duty Trucks, Construction Machinery, Excavators, Generator Sets

Global Supply & Distribution

We offer worldwide shipping capabilities, ensuring fast and reliable delivery to major ports and industrial centers across North America, Europe, Asia-Pacific, the Middle East, and South America. Our export experience allows for efficient logistics management, whether for single-unit orders or bulk container shipments. We comply with international trade standards to facilitate smooth customs clearance for our B2B partners.

Quality Assurance

Our pistons are manufactured in ISO-certified facilities, utilizing advanced casting and machining processes. Each production batch is subject to strict quality control procedures, including dimensional checks, material composition analysis, and pressure testing. A Machinery Test Report and Video Outgoing Inspection are available upon request to verify product quality. We back this product with a standard 6-month warranty against manufacturing defects, with extended warranty options available for volume orders.

FAQ

Q: Is this piston kit a direct fit for my Cummins ISL engine?
A: This kit is designed for the 8.9L Cummins engine family (ISL, QSL9, 6LTAA). To ensure a direct fit, please verify that your engine has a 114.0mm bore and that your current piston part number matches one of our cross-references (4987914, 5302254, 4936496, 5267632, or 5255218).

Q: What is included in the “Piston Kit”? Does it include rings?
A: This specific kit includes the piston body, piston pin, and retaining clips. It does not include piston rings. For a complete cylinder overhaul, we recommend purchasing piston rings separately, which can be sourced from our product line.

Q: What is the recommended installation procedure for this piston?
A: Installation should be performed by a qualified diesel technician. Key steps include: cleaning the cylinder bore, lubricating the piston and rings, using a proper ring compressor, and torquing the connecting rod bolts to the manufacturer’s specifications. Always refer to the Cummins service manual for your specific engine model for detailed torque values and procedures.