FMBP 472004 Engine Valve Lock

Engine Valve Lock for Performance Builds

This Melling engine valve lock is a steel replacement for performance valve train service. Part number 472004 is made in the USA and is engineered to meet or exceed OEM requirements for the listed applications.

Use this valve lock when servicing compatible Ford, Mercury, and Lincoln engines that require a 0.340-inch valve stem diameter and a two-groove lock design. The Melling 472004 is intended for performance-oriented engine work where valve retention and correct stem fit are critical.

Key Features

• Steel construction for valve train service
• Made in the USA
• 0.340-inch valve stem diameter
• Two-groove lock design
• Performance grade type
• Engineered to meet or exceed OEM requirements

Detailed Description

Part number 472004 is a Melling engine valve lock built for applications across a wide range of Ford, Mercury, and Lincoln performance engines. It is specified with a 0.340-inch valve stem diameter, 0.375-inch length, 0.500-inch width, and a two-groove configuration, making it a direct-fit service part for the listed valve train applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With Ford Mustang, Ford F-150, Ford Bronco, Mercury Cougar, and Lincoln Town Car applications shown in the fitment data, this valve lock supports engine rebuilds and valve service where the original lock should not be reused. Part number 472004 is also listed for Ford Explorer and Mercury Mountaineer performance applications.

What It Is Used For

• Replacing worn or reused valve locks during engine service
• Securing valves in performance valve train assemblies
• Restoring proper valve stem retention after rebuild work
• Addressing valve lock wear found during cylinder head service
• Supporting correct assembly in compatible Ford, Mercury, and Lincoln engines

Installation Notes and Tips

Verify valve stem diameter and lock groove count before installation. Melling states that new valve locks should be used for both reclaimed and new engine valves, and that reused locks should not be installed again. Confirm the application against the engine build specifications before assembly.

Quality Assurance

Melling manufactures this part with quality materials and to OEM-level requirements for the listed applications. Made in the USA.