Kenworth T700 Diesel Fuel Tanks

Frequently Asked Questions About Kenworth T700 Diesel Fuel Tanks

Will a replacement fuel tank fit my Kenworth T700 without modification?

Fuel tanks for the Kenworth T700 are typically designed to match factory mounting points, strap locations, and tank capacity options originally offered on the truck. However, because the T700 was built with multiple tank sizes and mounting configurations over its production run, it is important to confirm your truck's specific tank capacity, diameter, and mounting bracket layout before ordering. Checking your VIN or existing tank measurements against the product specifications will help ensure a proper fit.

What materials are these fuel tanks made from, and does it affect performance or longevity?

Diesel fuel tanks for the T700 are generally available in aluminum or steel construction. Aluminum tanks are lighter weight and naturally resistant to rust, which can be beneficial for reducing overall vehicle weight and long-term corrosion concerns. Steel tanks tend to be more rugged and may be preferred for certain heavy-duty or work truck applications. The right choice often depends on your priorities around weight savings versus durability.

How do I know what tank capacity I need?

Tank capacity is usually determined by the original setup of your truck, including whether it was equipped with single or dual tanks, and the gallon size the frame and brackets were built to support. Measuring your current tank's length, diameter, and strap spacing, or referencing your original equipment specifications, is the most reliable way to select a correctly sized replacement.

Can I install a replacement fuel tank myself, or should I have a professional do it?

While experienced DIY mechanics with proper lifting equipment can replace a fuel tank, this job involves working with fuel lines, straps, sending units, and mounting hardware that must be secured correctly to avoid leaks or road hazards. Many customers choose to have installation performed by a qualified truck repair shop to ensure the tank is properly sealed, vented, and mounted according to safety standards.

Are these fuel tanks compliant with DOT and safety regulations?

Fuel tanks intended for on-highway commercial trucks like the Kenworth T700 are generally manufactured to meet applicable DOT construction and mounting standards. That said, compliance also depends on correct installation, including proper strap tension, venting, and grounding. If you have specific regulatory requirements for your fleet or operation, it's a good idea to verify the tank's specifications and installation guidelines meet those standards before putting the truck back into service.