Frequently Asked Questions About Freightliner Coronado Diesel Fuel Tanks

What size fuel tanks are available for my Freightliner Coronado, and which models are they compatible with?

Freightliner Coronado fuel tanks typically come in 100, 120, and 150-gallon capacities. These tanks are designed to fit Coronado models from 2001 to present, including the 122SD and 132 variants. However, compatibility can vary based on your specific chassis configuration and wheelbase. Always verify your truck's VIN and model year before ordering, as mounting brackets and strap configurations changed in 2011 and again in 2018.

Are these fuel tanks made of aluminum or steel, and which material is better for my application?

Both aluminum and steel options are available. Aluminum tanks are lighter (reducing overall vehicle weight by 50-70 pounds per tank), resist corrosion better, and are ideal for long-haul applications where weight savings improve fuel economy. Steel tanks are more affordable, offer better impact resistance, and are preferred for vocational trucks in construction or mining where debris strikes are common. Most aluminum tanks feature .125" thick walls, while steel tanks typically have .080" walls with protective coating.

What installation hardware is included, and what additional parts might I need?

Standard fuel tanks come with mounting straps and basic hardware, but you'll typically need to purchase sending units, fuel caps, and vent lines separately. For 2011 and newer Coronados, you may also need updated J-bolts and rubber isolation pads. Plan on 3-4 hours for professional installation per tank, or 5-6 hours if you're doing it yourself. Many customers report needing new fuel line fittings when upgrading from smaller tanks.

Will aftermarket fuel tanks affect my warranty or emissions compliance?

Quality aftermarket fuel tanks that meet DOT specifications will not void your powertrain warranty. However, they must maintain proper venting and emissions equipment compatibility. Look for tanks certified to FMVSS 301 standards. For 2007 and newer trucks with DEF systems, ensure the tank doesn't interfere with DEF tank placement or heating elements. California operators should verify CARB compliance for any modifications.

How do I determine if I need a cylindrical or D-shaped tank for my Coronado?

Cylindrical tanks are the most common and mount between the frame rails using standard strap systems. D-shaped (or "belly") tanks mount flush against the frame rail and are typically used when ground clearance is critical or when dual tank configurations are needed. Check your current tank configuration and measure the available space between your frame rails - standard spacing is 34" for most Coronados. D-tanks are often required on trucks with auxiliary equipment like wet kits or toolboxes.