Isuzu K4N Piston Ring Set MM438689 4-Cylinder Diesel Engine Parts

Product Details

Product Overview

This high-quality Isuzu K4N Piston Ring Set (Part Number: MM438689) is a critical engine component designed for reliable performance in Isuzu machinery diesel engines. As a direct replacement part, it ensures optimal compression, oil control, and combustion efficiency. We provide global shipping to major industrial markets including North America, Europe, Southeast Asia, the Middle East, and Oceania, ensuring fast and reliable delivery for B2B buyers worldwide.

Key Features & Benefits

• Superior Durability: Manufactured from high-grade cast iron or steel alloy, providing exceptional wear resistance and long service life under high-stress conditions.
• Precision Engineering: Each ring is precisely ground and profiled to exact OEM specifications, ensuring a perfect seal within the cylinder bore.
• Optimized Oil Control: The ring set is designed to minimize oil consumption while maintaining proper cylinder wall lubrication, reducing friction and heat.
• Enhanced Performance: Restores engine compression, reduces blow-by, and improves fuel efficiency, leading to lower operating costs.
• Direct Fitment: Engineered for a seamless installation on Isuzu K4N engines, eliminating the need for modifications.

Technical Specifications

OEM Cross-Reference

This piston ring set replaces the following original equipment manufacturer (OEM) numbers:

• Isuzu OEM: MM438689
• Alternative Part Numbers: 5-87811017-0, 8-98023526-0 (verify fitment)

Compatibility

• Engine Models: Isuzu K4N (4BG1, 4BD1 variants may share compatibility, please confirm)
• Typical Applications: Isuzu Excavators, Wheel Loaders, Forklifts, and Industrial Generator Sets
• Year Range: Compatible with production years 1990s to 2010s (please verify engine serial number)

Global Supply & Distribution

As a leading supplier of diesel engine parts, we ensure efficient logistics for B2B clients worldwide. Our inventory supports:

• Major Markets: USA, Canada, UK, Germany, Australia, UAE, Saudi Arabia, Singapore, Indonesia, and Thailand.
• Shipping Ports: Fast delivery to major ports like Los Angeles, Rotterdam, Shanghai, Jebel Ali, and Singapore.
• Export Expertise: Experienced in international trade documentation, customs clearance, and bulk order fulfillment.

Quality Assurance

• Manufacturing Standards: Produced under ISO 9001:2015 quality management systems.
• Testing: 100% dimensional inspection and hardness testing before shipment.
• Warranty: 12-month warranty against manufacturing defects under normal operating conditions.

FAQ

Q: Is this piston ring set compatible with the Isuzu 4BG1 engine?
A: The MM438689 is primarily designed for the Isuzu K4N engine. While the 4BG1 series shares similar architecture, we recommend cross-referencing your engine’s bore size (typically 105mm for K4N) and ring groove dimensions to ensure a precise fit. Please consult your engine manual or contact our technical support with your engine serial number.

Q: What is the recommended installation procedure for these rings?
A: Standard diesel engine rebuild procedures apply. Ensure the cylinder bore is honed to the correct crosshatch pattern and within wear limits. Install the rings using a ring expander tool, staggering the ring gaps 120 degrees apart. Lubricate the rings and piston with clean engine oil before assembly. Torque the connecting rod bolts to factory specifications.

Q: How can I verify the quality of the rings before installation?
A: Before installation, check for any visual defects such as cracks or burrs. Measure the ring end gap by inserting the ring into the cylinder bore (at the top of the ring travel) and using a feeler gauge. The end gap should fall within the manufacturer’s service limits (typically 0.30mm to 0.50mm for top rings). If the gap is too tight, the ring may break; if too loose, it will cause blow-by.