Frequently Asked Questions About Kenworth T660 Diesel Fuel Tanks

What fuel tank sizes are available for the Kenworth T660, and how do I choose the right capacity?

Kenworth T660 fuel tanks typically range from 70 to 150 gallons per side, with 100-gallon and 120-gallon tanks being the most common configurations. To choose the right capacity, consider your typical route length, fuel economy (usually 5-7 MPG), and weight restrictions. Long-haul drivers often prefer dual 120-gallon setups for extended range, while regional haulers may opt for 100-gallon tanks to save weight. Remember that larger tanks add approximately 8 pounds per gallon when full, which affects your payload capacity.

Will these fuel tanks fit my specific year model T660, and what are the mounting differences?

Fuel tanks for the T660 are generally compatible across model years 2008-2016, but there are important mounting variations. Pre-2011 models use a 3-strap mounting system, while 2011 and newer models typically use a 4-strap configuration. The tank brackets and spacing also differ slightly between early (2008-2010) and late (2011-2016) models. Always verify your VIN and existing mounting setup before ordering, as some chassis configurations may have custom spacing that requires different brackets or modification.

What materials are these fuel tanks made from, and which is better for my application?

T660 fuel tanks come in two primary materials: aluminum and steel. Aluminum tanks are lighter (saving 100-150 pounds per tank), resist corrosion better, and are ideal for weight-sensitive applications or coastal regions. Steel tanks cost less upfront, are more impact-resistant, and better suited for rough terrain or construction applications. Both materials meet DOT specifications, but aluminum tanks typically last longer in road salt conditions while steel tanks handle physical abuse better.

Can I install these fuel tanks myself, and what tools or parts will I need?

Installation is possible for experienced mechanics but requires proper equipment and safety precautions. You'll need a transmission jack or tank jack, impact wrenches, and a helper for safe handling. The job typically takes 3-4 hours per tank. Required parts include new fuel tank straps, rubber isolators, sending unit gaskets, and potentially new fuel lines if yours show wear. Many customers report that alignment can be tricky, especially on trucks with aftermarket suspensions. Professional installation runs $200-400 per tank but ensures proper mounting and leak testing.

Do these replacement tanks come with sending units, straps, and other necessary components?

Most replacement fuel tanks are sold as bare units without sending units, straps, or mounting hardware. You'll need to transfer your existing sending unit (fuel gauge sensor) or purchase a new one separately. Tank straps, rubber mounting strips, and brackets are typically sold separately as well. Some retailers offer complete kits that include these components, which cost more initially but save time sourcing individual parts. Always verify what's included before ordering to avoid installation delays.