BCBC VS-350 Engine Valve Spring

Overview

Melling VS-350 is a standard replacement engine valve spring built for classic Ford and Mercury applications that require the L10-to-L14 changeover. It uses corrosion-resistant steel and a single-spring design to deliver consistent valve control for street and performance use.

Compatible with Ford Mustang, Ford Fairlane, Mercury Cougar, and other listed applications, this spring is suited for engines that need the specified installed height and pressure range. The VS-350 part number is also referenced as a direct replacement for several cross-listed applications.

Key Features

• Corrosion-resistant steel construction for dependable service.
• Single-spring design for standard replacement use.
• Installed height: 1.64 in. / 42.0 mm.
• Installed pressure: 60.0 lb.
• Open pressure: 166.0 lb. at 1.25 in. / 32.0 mm.
• Coil bind height: 1.105 in. / 28.0 mm.
• Inside diameter: 0.885 in. / 22.0 mm.
• Outside diameter: 1.225 in. / 31.0 mm.

Detailed Description

The Melling VS-350 valve spring is engineered as a standard replacement option for engines that call for a single spring with the listed height and pressure specifications. Its corrosion-resistant steel construction supports consistent operation in street-driven and performance-oriented builds, while the spring dimensions help maintain proper valve control within the intended operating range. This part number, VS-350, is used across multiple Ford and Mercury applications from 1966-1968, including Mustang, Cougar, Comet, and Cyclone models with the noted L10-to-L14 changeover requirement.

Melling offers a broad valve spring lineup for standard, mid-range, heavy-duty, and race-ready needs, and the VS-350 fits within that range as a standard replacement spring. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Replacing a worn or weakened valve spring in compatible engines.
• Restoring valve control when spring pressure has dropped.
• Addressing valve train instability caused by incorrect spring height or bind clearance.
• Supporting stock-style engine service on classic Ford and Mercury platforms.
• Matching the specified spring dimensions for rebuild or maintenance work.

Installation Notes and Tips

Verify installed height, coil bind clearance, and spring pressure against the engine’s requirements before installation. Confirm the L10-to-L14 changeover note in the fitment data for the listed Ford and Mercury applications. Use the VS-350 part number and the engine’s service specifications to confirm the correct spring before assembly.

Quality Assurance

Melling manufactures this spring in the USA and supplies valve springs across standard, performance, and race-oriented applications. The VS-350 is a standard replacement part built to meet the dimensional and pressure requirements listed for the application.