Sealed Power 4261M Engine Crankshaft Main Bearing Set

Overview of Sealed Power Engine Crankshaft Main Bearing Set 4261M

The Sealed Power 4261M engine crankshaft main bearing set is designed as an OE replacement for Ford and Mercury vehicles from 1964 to 1975. This main set supports engines with displacements of 390, 427, and 428 cubic inches, providing reliable performance for classic models like the Mustang and F-150.

• Compatible with Ford and Mercury vehicles including Mustang, F-100, Cougar, and Thunderbird
• Engine displacement fitment: 390, 427, and 428 cubic inches
• Manufactured from overplated copper-lead alloy for durability
• Available in standard and multiple undersizes (Std, 1-10-60)
• Complete main bearing set for crankshaft support

Product Details and Specifications

The Sealed Power 4261M main bearing set is engineered to meet original equipment specifications for Ford and Mercury engines within the 390, 427, and 428 engine families. Constructed from an overplated copper-lead alloy, these bearings offer a balance of strength and wear resistance essential for maintaining crankshaft stability. The set includes a range of sizes from standard to 0.60mm undersize, allowing precise fitment during engine rebuilds or repairs. This main set is suitable for a variety of classic vehicles such as the Ford Mustang, Mercury Cougar, and Ford F-150, ensuring compatibility with popular models from the 1964-1975 production years.

Applications and Problem Solving

• Replacement for worn or damaged main bearings in 390, 427, and 428 Ford engines
• Addresses crankshaft end play and bearing clearance issues
• Restores proper oil clearance to prevent engine knocking and wear
• Supports engine rebuilds for classic Ford and Mercury vehicles
• Helps reduce vibration and improve engine smoothness

Installation Notes and Tips

When installing the Sealed Power 4261M main bearing set, ensure the crankshaft journals are clean and free of debris. Measure journal diameters carefully to select the correct bearing size from the available standard and undersize options. Proper torque specifications should be followed to avoid bearing distortion. It is recommended to check oil clearances with plastigage or a micrometer to confirm correct fitment before final assembly.

Quality Assurance and Warranty

Sealed Power bearings are manufactured to meet strict OEM standards, ensuring consistent quality and durability. The 4261M main bearing set undergoes rigorous testing to maintain performance under demanding engine conditions. While specific warranty details are not provided, Sealed Power products typically come with a limited warranty against manufacturing defects, supporting reliability for engine rebuild projects.