Kenworth T660 Fuel Tanks

Frequently Asked Questions About Kenworth T660 Fuel Tanks

What size fuel tanks are available for my Kenworth T660, and how do I determine the right capacity?

Kenworth T660 fuel tanks typically range from 100 to 150 gallons per tank, with dual tank setups offering 200-300 total gallons. To determine the right capacity, check your door jamb sticker for OEM specifications or measure your existing tank dimensions (length x diameter). Most T660 models from 2008-2016 use either 26-inch or 23-inch diameter tanks. Consider your typical route distances and weight restrictions when selecting capacity - larger tanks mean fewer fuel stops but add weight that reduces payload capacity.

Will aftermarket fuel tanks fit my specific T660 model year, and what mounting hardware do I need?

Fuel tank compatibility varies between 2008-2012 and 2013-2016 T660 models due to frame rail spacing changes. Early models (2008-2012) typically use 24.5-inch strap spacing, while later models use 26-inch spacing. You'll need the correct mounting straps, brackets, and step hangers specific to your year. Most aftermarket tanks require reusing your existing fuel sending unit and pickup tube. Always verify your frame rail width and existing tank dimensions before ordering to ensure proper fitment.

What's the difference between aluminum and steel fuel tanks, and which is better for my T660?

Aluminum tanks are 65% lighter than steel equivalents, resist corrosion better, and are standard on most T660s. A 120-gallon aluminum tank weighs approximately 55 pounds empty versus 160 pounds for steel. However, aluminum tanks cost 40-60% more and can develop stress cracks at mounting points after 500,000+ miles. Steel tanks are more impact-resistant and budget-friendly but require regular inspection for rust, especially in salt-belt states. Most drivers choose aluminum for weight savings unless operating in extreme conditions where durability trumps weight.

Can I install a larger fuel tank myself, or do I need professional installation?

While experienced mechanics can complete the installation in 3-4 hours per tank, several factors make professional installation advisable. You'll need to safely drain and dispose of existing fuel, disconnect fuel lines and sending unit wiring, and ensure proper grounding to prevent static discharge. New tanks often require transferring components like fuel pickups, vents, and sending units from old tanks. Improper installation can cause fuel leaks, gauge malfunctions, or tank damage. Most shops charge $200-400 per tank for installation, which includes pressure testing and warranty coverage.

What aftermarket fuel tank brands offer direct-fit options for the T660?

Avoid universal-fit tanks that require extensive modification - T660-specific tanks ensure proper strap spacing, step alignment, and sending unit compatibility.