Freightliner FLC120 Fuel Tank Caps

Frequently Asked Questions About Freightliner FLC120 Fuel Tank Caps

Will this fuel tank cap fit my Freightliner FLC120?

Fuel tank caps for the FLC120 typically come in a few different neck diameters and thread patterns depending on the model year and tank manufacturer, so it's important to measure your existing cap or check your tank's neck size before ordering. If you're unsure, comparing the part number on your current cap to the listing details or reaching out to our parts specialists can help confirm a proper fit.

Is this a vented or non-vented fuel cap?

Fuel tank caps are available in both vented and non-vented styles, and using the wrong type can cause fuel delivery issues or pressure buildup in the tank. Check the style of your original cap and the product description carefully, since venting design is one of the most common mix-ups customers run into when replacing a cap.

What material and finish options are available?

Most replacement caps are constructed from durable steel or chrome-plated steel for corrosion resistance and a finished look that matches OEM styling. Chrome finishes are popular for appearance-focused buyers, while standard steel options offer a more budget-friendly, functional replacement.

Does this fuel cap include a lock, and how does it work?

Some fuel tank caps for the FLC120 are lockable to help deter fuel theft, while others are simple non-locking caps. If locking security is important to you, check the listing to confirm whether keys are included and how many keys come with the cap, since this varies by product.

How do I install a replacement fuel tank cap?

Installation is generally straightforward: remove the old cap by turning it counterclockwise, then thread the new cap onto the tank neck by hand until it seats snugly. No special tools are typically required, but you should make sure the gasket or seal is seated properly to prevent leaks or debris from entering the tank.