BCBC MPR-331 Engine Push Rod

Overview

Melling MPR-331 is a standard replacement engine push rod built for stock valve train applications. Made in the USA and engineered to strict manufacturing specifications, it uses welded steel construction with ball ends for consistent valve train geometry.

This push rod is listed for a wide range of American Motors, Jeep, and International applications, including stock setups that require the correct length and tip design. MPR-331 is a direct-fit option for buyers restoring or servicing older engines that call for this specification.

Key Features

• Welded steel construction for standard engine service
• Ball-end top and bottom tips
• Standard replacement grade
• Drilled: No
• Made in the USA
• Part number MPR-331

Detailed Description

Melling MPR-331 is an engine push rod designed for stock valve train applications where correct geometry matters. The welded steel body measures 0.312 in. in diameter and 9.414 in. in length, with 0.36 in. ball-end tips at both ends. This specification supports proper rocker arm contact and stable valvetrain operation in compatible engines.

Fitment includes 1964-1970 American Motors models such as American, Classic, Marlin, Ambassador, Rebel, Javelin, Hornet, Gremlin, and Rambler; 1965-1970 Jeep models including J-100, J-2500, J-2600, J-2700, J-2800, J-3500, J-3600, J-3700, J-3800, Wagoneer, and Gladiator; and 1969-1972 International applications including M800, M1100, M1200, M1400, 1000D, 1100D, 1200D, 1300D, 1110, 1010, 1210, 1310, Scout 800, M800 Post Office, and M800 Navy. Notes include stock use, 8.5 ratio rocker arm applications, and serial-number-specific coverage where listed.

This part cross-references Monroe Shocks & Struts (e.g., 190-1419, 48084) for the same application.

What It Is Used For

• Replacing a worn or bent push rod in a stock valve train
• Restoring correct rocker arm geometry
• Addressing valvetrain noise caused by incorrect push rod length or wear
• Supporting proper valve lift transfer in compatible engines
• Servicing older engines that require a standard replacement push rod

Installation Notes

Verify push rod length, tip style, diameter, and engine application before installation. This part is listed for stock and 8.5 ratio rocker arm applications, with some International fitments limited by serial number. Replace push rods in matched condition when wear or damage is present, and confirm valvetrain geometry after assembly.

Quality Assurance

Melling states that this push rod is manufactured to stringent specifications using quality materials and processes. The brand also recommends installing new push rods to maintain proper valve train geometry and performance.