Mitsubishi 4DR5 6DR5 Diesel Engine Piston 31617-00106 | 94mm | Heavy Equipment Spare Parts

Product Details

Product Overview

This high-quality replacement piston (Part No. 31617-00106) is specifically engineered for the Mitsubishi 4DR5 and 6DR5 diesel engine series. Designed for heavy-duty performance in construction machinery, excavators, and industrial generators, this piston ensures reliable combustion and long service life. We offer global shipping with fast delivery to major ports and industrial hubs across North America, Europe, Asia-Pacific, the Middle East, and South America.

Key Features & Benefits

• Precision Engineering: Manufactured to OEM specifications for a perfect fit and optimal compression ratio in 4DR5 and 6DR5 engines.
• Superior Durability: Constructed from high-strength aluminum alloy with reinforced ring grooves to withstand extreme combustion pressures and temperatures.
• Enhanced Performance: Advanced skirt profile reduces friction and noise, improving fuel efficiency and engine responsiveness.
• Reliable Sealing: Optimized ring land design ensures excellent oil control and gas sealing, reducing blow-by and oil consumption.
• Rigorous Testing: 100% inspected for dimensional accuracy, material hardness, and thermal stability before shipment.

Technical Specifications

OEM Cross-Reference

• Mitsubishi OEM: 31617-00106, 31617-00100
• Alternative Part Numbers: ME994155, ME994156
• Aftermarket Reference: 3161700106

Compatibility

• Engine Models: Mitsubishi 4DR5 (4-cylinder), 6DR5 (6-cylinder)
• Vehicle Applications: Mitsubishi heavy-duty trucks, buses, and industrial equipment
• Machinery: Excavators, wheel loaders, forklifts, generators, and marine engines using 4DR5/6DR5 series
• Year Range: 1980s–2000s (confirm fitment with your engine serial number)

Global Supply & Distribution

• Worldwide Shipping: Reliable logistics partners for air, sea, and land freight to over 50 countries.
• Major Markets Served: USA, Canada, UK, Germany, Australia, UAE, Saudi Arabia, Singapore, South Africa, and Brazil.
• Fast Delivery: Stock available for immediate dispatch to ports like Rotterdam, Los Angeles, Shanghai, and Jebel Ali.
• Export Experience: 15+ years in international trade with full customs documentation and compliance.

Quality Assurance

• Manufacturing Standards: ISO 9001:2015 certified production facility with strict quality control.
• Testing: Each piston undergoes dimensional inspection, material composition analysis, and thermal shock testing.
• Warranty: 12-month warranty against manufacturing defects under normal operating conditions.

FAQ

Q1: Is this piston compatible with my Mitsubishi 6DR5 engine in an excavator?
A1: Yes, this piston (31617-00106) is designed for both 4DR5 and 6DR5 engines. However, we recommend verifying your engine serial number and piston diameter (94mm) to ensure exact fitment. If your engine uses a different piston diameter (e.g., oversized), please contact us for options.

Q2: Does the piston come with piston rings and a pin?
A2: This listing is for the piston only (Part No. 31617-00106). Piston rings and wrist pins are sold separately. We recommend using a matched ring set (e.g., 3-ring set) for optimal performance. Please inquire about ring and pin availability.

Q3: What is the recommended installation procedure for this piston?
A3: Installation should follow the Mitsubishi service manual. Key steps include: (1) Clean the cylinder bore and piston thoroughly, (2) Lubricate the piston skirt and rings with engine oil, (3) Use a ring compressor to install the piston into the cylinder, ensuring the arrow on the piston crown points toward the front of the engine, (4) Torque the connecting rod bolts to factory specifications. For best results, consult a qualified diesel mechanic.