Peterbilt 367 Fuel Tank Caps

Frequently Asked Questions About Peterbilt 367 Fuel Tank Caps

Will this fuel tank cap fit my Peterbilt 367?

Fuel tank caps for the Peterbilt 367 are typically designed to match specific tank neck diameters and thread patterns used on this model, but fitment can vary depending on the year of your truck and whether the tank was replaced or updated at some point. Before ordering, measure your existing cap or the fuel neck opening and compare it to the listed specifications on the product page to confirm a proper match.

What materials are these fuel tank caps made from, and which is the best choice?

Most replacement caps are available in either chrome-plated steel or polished aluminum. Chrome caps offer a bright, reflective finish and added corrosion resistance, while aluminum caps are lighter weight and resist rust naturally. Your choice often comes down to the look you want and how it matches other tank and fuel system components on your truck.

Does this cap include a lock, and is a locking cap necessary?

Some fuel tank caps come with a built-in locking mechanism and key, while others are non-locking. A locking cap can help deter fuel theft or tampering, which is a common concern for trucks that sit overnight at truck stops or rest areas. If security is a priority, look for product listings that specifically mention a locking feature and check whether keys are included or sold separately.

How do I know if I need a vented or non-vented fuel cap?

Fuel systems are designed to work with either a vented or non-vented cap, and using the wrong type can affect fuel delivery or cause pressure issues in the tank. Check your original cap for small vent holes or markings, and if you are unsure, refer to your truck's fuel system documentation or contact our support team with your VIN or tank details so we can help confirm the correct type.

How do I properly install and maintain a fuel tank cap for long-term use?

Installation is generally straightforward, hand-tightening the cap onto the fuel neck threads until snug, without overtightening which can damage the threads or seal. To keep the cap functioning properly, periodically inspect the rubber gasket or seal for cracking and wipe down the threads to prevent dirt or corrosion buildup that could affect the seal over time.