Western Star 5700XE Truck Fuel Tank Caps

Frequently Asked Questions About Western Star 5700XE Truck Fuel Tank Caps

Will this fuel tank cap fit my Western Star 5700XE?

Fuel tank caps for the 5700XE are designed to match the factory fuel tank neck size and thread pattern used on this model. Since fuel tank suppliers and tank designs can vary by build year, it is important to check the thread diameter and style of your existing cap, or reference your truck's build sheet, before ordering to ensure a proper fit.

Are these caps vented or non-vented?

Fuel tank caps come in both vented and non-vented styles, and using the correct type matters for proper tank pressure and fuel system performance. Check your current cap or your owner's manual to confirm which style your 5700XE requires before purchasing a replacement.

What materials and finishes are available?

Fuel tank caps for this model are commonly offered in chrome-plated steel, stainless steel, and plastic options. Chrome and stainless finishes offer a polished look and added corrosion resistance, while plastic caps are typically lighter and more budget-friendly. Choose a finish that matches the rest of your truck's fuel tank hardware and your durability preferences.

Does this cap include a lock, and can it be keyed to match my other locks?

Some fuel tank caps include a locking mechanism to help deter fuel theft and tampering, while others are non-locking. Locking caps typically come with their own set of keys and are not usually keyed to match other locks on your truck, such as door or storage compartment locks, unless specifically stated by the manufacturer.

How do I install a replacement fuel tank cap?

In most cases, installation simply involves removing the old cap by unscrewing it from the fuel tank neck and threading on the new one by hand until it is snug. No special tools are typically required. If your cap includes a tether or safety cable, make sure it is properly attached to the tank before use.