Peterbilt 587 Fuel Tank Caps

Frequently Asked Questions About Peterbilt 587 Fuel Tank Caps

Will this fuel tank cap fit my Peterbilt 587?

Fuel tank caps for the Peterbilt 587 are designed to match the OEM neck size and locking mechanism used on this model, but fuel tank configurations can vary depending on the year and tank supplier used during manufacturing. Before ordering, check your existing cap for size markings or measure the neck diameter and thread pattern to confirm a proper match.

Are these caps locking or non-locking, and how does that affect security?

Both locking and non-locking versions are available in this category. Locking caps require a key to remove and help deter fuel theft and tampering, while non-locking caps are simpler to use but offer no anti-theft protection. Choose based on how much security you need for your fuel system.

What materials and finishes are available for these caps?

Peterbilt 587 fuel tank caps are commonly available in chrome-plated steel or polished aluminum, with some options offering a plastic or rubber gasket seal to prevent leaks and keep out debris. Chrome and polished finishes are popular for matching the look of other exterior trim on the truck.

How do I know if my fuel tank cap is venting properly?

Most fuel tank caps include a vent to allow air to enter the tank as fuel is drawn out, preventing a vacuum that can starve the engine or cause hard starting. If you notice stalling, sputtering, or difficulty fueling, a worn or clogged vent could be the cause, and replacing the cap is often a simple fix.

How do I install a replacement fuel tank cap on my Peterbilt 587?

In most cases, installation is as simple as threading the new cap onto the fuel tank neck by hand until it seats securely, without the need for tools. If you are installing a locking cap, make sure to test the key and locking mechanism before you rely on it, and always confirm the cap seals tightly to avoid fuel loss or contamination.