Kenworth T680 Diesel Fuel Tanks

Frequently Asked Questions About Kenworth T680 Diesel Fuel Tanks

Will a replacement fuel tank fit my Kenworth T680 without modification?

Fuel tanks are typically sold by capacity, diameter, and mounting configuration rather than a universal fit. Before ordering, check your existing tank's dimensions, strap style, and mounting bracket spacing against the listed specifications to ensure a direct bolt-on fit for your specific model year and trim of T680.

What materials are these fuel tanks made from, and how do they hold up over time?

Kenworth T680 fuel tanks are generally offered in aluminum or steel. Aluminum tanks are lighter and naturally resist rust, while steel tanks tend to be more dent-resistant but require a protective coating to prevent corrosion. Choosing between the two often comes down to a balance of weight savings versus durability under harsh road conditions.

How do I determine the right tank capacity for my truck?

Fuel tank capacity is usually measured in gallons and should match or complement your original tank setup to maintain proper balance and range between fills. Consider your typical routes, fuel stop availability, and whether you're running single or dual tank configurations before selecting a size.

What's involved in installing a new diesel fuel tank?

Installation generally involves draining and disconnecting the old tank, removing the mounting straps and brackets, transferring or replacing components like the fuel sending unit and drain plug, then securing the new tank in place with straps torqued to the manufacturer's specification. Because fuel lines and electrical connections are involved, many customers have this done by a qualified technician rather than as a DIY project.

Do these fuel tanks come with mounting straps and hardware included?

This varies by listing, so it's important to check the product description for each specific tank. Some come as a complete kit with straps and mounting hardware included, while others are sold as the tank only, requiring you to reuse your existing straps or purchase them separately.