Mitsubishi 4M51 Main Bearing & Connecting Rod Bearing Set STD ME990017 Engine Parts

Product Details

Product Overview

This premium quality Main Bearing and Connecting Rod Bearing Set (Standard Size) is specifically engineered for the Mitsubishi 4M51 diesel engine. As a critical component for engine rebuilding and maintenance, this bearing set ensures optimal crankshaft support and rod journal alignment. We supply this essential engine part to workshops, distributors, and OEM dealers across North America, Europe, Asia-Pacific, and the Middle East, ensuring fast and reliable global shipping.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM specifications (ME990017) for a perfect fit and reliable performance in Mitsubishi 4M51 engines.
• Superior Material Composition: Constructed from high-strength steel-backed aluminum alloy or copper-lead material, providing excellent wear resistance and load-bearing capacity.
• Standard Size (STD): Designed for standard crankshaft journals, ideal for engine rebuilds where the crankshaft is in good condition.
• Enhanced Durability: Features a specialized anti-friction coating that reduces heat generation and extends bearing life under heavy load conditions.
• Optimal Oil Clearance: Engineered with precise oil clearance tolerances to ensure proper lubrication and prevent engine seizure.

Technical Specifications

OEM Cross-Reference

• OEM Part Number: ME990017
• Alternative Reference: This part is the direct replacement for the Mitsubishi genuine bearing set for the 4M51 engine.
• Cross-Reference Note: Always verify the exact size (STD, 0.25, 0.50) and engine model (4M51) before purchase. This listing is for Standard Size.

Compatibility

• Engine Model: Mitsubishi 4M51 (Direct Injection Diesel Engine)
• Typical Applications: Commonly used in Mitsubishi heavy machinery, industrial equipment, and specific generator sets powered by the 4M51 engine.
• Note: Please confirm your engine’s serial number and current bearing size (STD) to ensure compatibility.

Global Supply & Distribution

We are a dedicated supplier of aftermarket and OEM-equivalent engine parts for the global market.

• Worldwide Shipping: We ship to all major ports and industrial centers worldwide via DHL, FedEx, UPS, and Sea Freight.
• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, France, Netherlands), Asia-Pacific (Japan, Korea, Australia, Singapore), Middle East (UAE, Saudi Arabia, Qatar), and Africa (South Africa, Nigeria).
• Fast Delivery: Standard orders are processed within 24-48 hours. Express shipping options available for urgent requirements.
• Trade Compliance: We have extensive experience in international trade documentation, customs clearance, and export regulations.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities, ensuring consistent quality and dimensional accuracy.
• Testing: Each batch undergoes rigorous hardness, wear resistance, and dimensional tolerance testing to meet or exceed OEM standards.
• Warranty: We offer a standard 12-month warranty against manufacturing defects. Extended warranty options are available for bulk orders.
• Certification: Parts are traceable and comply with international quality standards for heavy-duty diesel engines.

FAQ

Q1: Will this bearing set fit my Mitsubishi 4M51 engine if I have already machined the crankshaft?
A: No. This set is specifically for Standard (STD) size crankshaft journals. If your crankshaft has been ground undersize (e.g., 0.25mm or 0.50mm), you will need a corresponding undersize bearing set. Please confirm your journal size before purchase.

Q2: What is the difference between a Main Bearing and a Connecting Rod Bearing in this set?
A: The Main Bearings support the crankshaft within the engine block. The Connecting Rod Bearings attach the connecting rods to the crankshaft journals. This set includes both, providing a complete solution for the lower engine assembly.

Q3: How do I ensure proper installation and prevent bearing failure?
A: Ensure all bearing surfaces and the crankshaft journals are perfectly clean and free of debris. Apply a thin layer of clean engine oil to the bearing surfaces during assembly. Always torque the main cap and connecting rod bolts to the manufacturer’s specified torque settings using a calibrated torque wrench. Failure to do so can lead to bearing spin or seizure.