ME031886 ME031888 4D31 6D31 Valve Guide for Mitsubishi Engine Parts Excavator

Product Details

Product Overview

This high-precision valve guide, identified by part numbers ME031886 and ME031888, is a critical component for Mitsubishi diesel engines. Designed to fit the widely used 4D31 and 6D31 engine models, this part ensures proper valve stem alignment and heat dissipation within the cylinder head.

Manufactured to original equipment (OEM) specifications, this valve guide is commonly applied in heavy-duty construction and industrial machinery. It is a direct replacement part for excavators, bulldozers, forklifts, loaders, trucks, and buses powered by Mitsubishi 4D31/6D31 engines. While we recommend professional verification, this component is engineered to restore engine compression and reduce oil consumption in your equipment.

Key Features & Benefits

• Precision Engineering: Machined to strict OEM dimensions (ME031886 / ME031888) for a perfect fit with no modification required.
• Enhanced Durability: Manufactured from high-grade alloy material to withstand extreme combustion chamber temperatures and reduce wear.
• Improved Oil Control: Designed to minimize oil leakage past the valve stem, reducing smoke emissions and oil consumption.
• Direct Replacement: Drop-in ready for Mitsubishi 4D31 and 6D31 diesel engines, simplifying your overhaul or repair project.
• Comprehensive Application: Suitable for a wide range of heavy equipment including excavators, loaders, and trucks, reducing your inventory complexity.
• Rigorous Testing: Each batch undergoes machinery test reports and video outgoing inspections to ensure consistent quality.

Technical Specifications

OEM Cross-Reference

This valve guide is a direct replacement for the following original Mitsubishi part numbers:

• ME031886 (Primary Part Number)
• ME031888 (Alternative/OEM Part Number)

Note: These numbers are cross-referenced from Mitsubishi heavy equipment and industrial engine parts catalogs for the 4D31 and 6D31 series. Always confirm your specific engine serial number.

Compatibility

This product is commonly used for the following engine models and applications. Fitment is based on standard OEM configurations; professional verification is recommended.

• Engine Models: Mitsubishi 4D31, Mitsubishi 6D31
• Vehicle/Equipment Applications:
  • Excavators
  • Bulldozers
  • Forklifts
  • Wheel Loaders
  • Trucks & Buses
  • Industrial Generators (with 4D31/6D31 engines)

Global Supply & Distribution

maintains a robust global supply chain, ensuring fast and reliable delivery to industrial centers worldwide. Our standard export packaging protects parts during transit, and we ship via air, sea, or express courier (DHL, FedEx, UPS, TNT).

• Major Markets Served: North America, Europe (EU), Southeast Asia, Middle East (UAE, Saudi Arabia), Africa, South America, and Oceania.
• Shipping Capabilities: We stock high-volume parts in our Guangdong warehouse for rapid dispatch to major ports like Shanghai, Shenzhen, and Guangzhou.
• Trade Compliance: Experienced in international B2B trade, including customs documentation and tariff code classification for engine components.

Quality Assurance

We are committed to providing parts that meet or exceed OEM performance standards.

• Manufacturing Standards: Produced in ISO-compliant facilities with strict dimensional tolerance control.
• Testing: Machinery Test Reports are available upon request. Video Outgoing Inspections can be provided to verify order accuracy before shipment.
• Warranty: All valve guides come with a 6-month warranty against manufacturing defects in material and workmanship.

FAQ

Q1: How do I know if this valve guide fits my Mitsubishi 6D31 engine?
A: This part is designed for the standard cylinder head of the 6D31 and 4D31 engines. For absolute certainty, please check the part number stamped on your old valve guide (it should read ME031886 or ME031888). If the guide is worn and the number is illegible, measure the outer diameter of the old guide; this part matches the OEM specification.

Q2: Can I install this valve guide without special tools?
A: While a DIY mechanic may attempt installation, we strongly recommend using a valve guide driver and a reamer. The guide must be pressed squarely into the cylinder head to the correct height. After installation, a valve guide reamer (sized for your valve stem) is typically required to ensure the final clearance is within service limits (usually 0.03-0.07 mm for Mitsubishi engines).

Q3: What is the typical lifespan of this valve guide in an excavator application?
A: Lifespan depends heavily on maintenance and operating conditions. Under normal heavy-duty use with proper lubrication and clean air filtration, Mitsubishi 4D31/6D31 valve guides typically last 4,000 to 8,000 hours. Failure (excessive oil burning, smoke) usually occurs due to valve stem wear or carbon build-up, not the guide itself. We recommend replacing valve stem seals simultaneously for best results.