Motorad 6031-02 Engine Oil Filler Cap

Heavy Duty Oil Filler Cap Overview

The Motorad 6031-02 heavy duty oil filler cap is built for commercial and vocational engines that need a secure seal and OEM-style fit. It uses a push-fit cam design with a metal and rubber construction to help maintain proper sealing and reduce oil loss.

Compatible With a wide range of Freightliner, Peterbilt, Kenworth, Western Star, and International applications, this oil filler cap is a direct service part for heavy-duty engine compartments. The silver and black finish also provides a clean appearance under the hood.

Key Features

• Push-fit cam design for straightforward cap engagement.
• Metal and rubber construction for sealing performance and durability.
• Includes a gasket or seal for proper closure.
• Built to OEM specifications and meets or exceeds original equipment manufacture specifications.
• Non-vented design for applications that require a sealed oil filler cap.
• Heavy Duty Oil Filler Cap styling with a finished appearance for the engine compartment.

Detailed Description

Motorad part number 6031-02 is an engine oil filler cap engineered for heavy-duty service. The cap measures 1.72 inches at the neck diameter and 2.35 inches at the shell diameter, with a push-fit cam type and non-vented construction. Its metal and rubber build supports a secure seal, while the included gasket or seal helps maintain closure integrity. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Fitment coverage includes many commercial trucks, buses, coaches, and specialty vehicles. Fits 2000-2016 Freightliner Columbia, N/A; Fits 1987-2003 Kenworth T800, N/A; Fits 1987-2003 Peterbilt 379, N/A; Fits 1987-2002 Western Star 4900, N/A; Fits 1993-2007 Motor Coach Industries 102DL3, N/A; Fits 2003-2023 Terex / Terex Advance Terex Advance Mixer, N/A.

What It Is Used For

• Replacing a worn or damaged oil filler cap that no longer seals correctly.
• Addressing oil loss caused by a loose or degraded cap seal.
• Restoring proper closure on heavy-duty engine oil fill points.
• Correcting fitment issues on OEM-style service replacements.
• Replacing a cap with a damaged finish or compromised rubber sealing surface.

Installation Notes and Tips

Verify the neck diameter and cap style before installation. Confirm the application against the vehicle listing and check that the sealing surface is clean before seating the cap. The push-fit cam design is intended for direct replacement on listed heavy-duty applications.

Quality Assurance

Motorad manufactures this cap from high-quality components as an OE supplier and builds it to OEM specifications. The 6031-02 is designed to provide proper fit and sealing for heavy-duty engine service.