Frequently Asked Questions About International 9300/9370 Diesel Fuel Tanks

What size fuel tanks are available for International 9300 and 9370 models, and how do I know which fits my truck?

Fuel tanks for International 9300/9370 models typically range from 50 to 150 gallons, with 100 and 120-gallon tanks being the most common. To determine the correct fit, check your truck's VIN plate or door jamb sticker for the original tank specifications. Measure your existing tank's diameter (usually 23" or 25") and length, and verify the mounting strap spacing. Most 9300/9370 models from 1987-2003 use similar mounting configurations, but always confirm your specific year and chassis configuration before ordering.

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

Both aluminum and steel tanks are available. Aluminum tanks are lighter (reducing overall vehicle weight by 50-100 pounds), resist corrosion better, and are ideal for trucks operating in northern climates with road salt exposure. Steel tanks are more affordable, typically 30-40% less expensive than aluminum, and offer better impact resistance. For long-haul applications where weight matters, choose aluminum. For local or vocational trucks where durability against impacts is crucial, steel may be the better choice.

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

While experienced mechanics can install these tanks, we recommend professional installation for safety reasons. The job requires draining existing fuel, disconnecting fuel lines and electrical connections, removing heavy mounting straps, and ensuring proper grounding. Installation typically takes 2-4 hours. Key tools needed include tank straps, new rubber isolators, fuel line fittings, and proper lifting equipment. Always replace the fuel cap, sending unit gasket, and tank straps during installation to prevent future issues.

Will aftermarket fuel tanks affect my fuel gauge readings or require modifications to my fuel system?

Quality aftermarket tanks are designed to work with your existing sending unit and fuel system without modifications. However, you must transfer your original sending unit to the new tank, ensuring proper ohm range compatibility (typically 33-240 ohms for these models). Some customers report initial gauge calibration issues that resolve after a few fill-ups. If switching to a different capacity tank, you may need to recalibrate your fuel computer or adjust trip planning accordingly.

What's the difference between round and D-shaped fuel tanks, and which style works with my International 9300/9370?

Most International 9300/9370 models use round tanks mounted with steel straps beneath the frame rails. D-shaped tanks are typically found on newer models or custom applications where ground clearance is critical. Round tanks offer more capacity for the same length and are easier to find in aftermarket options. Check your current tank configuration - if you have frame-mounted straps running under the tank, you need a round tank. Step-mounted or side-mounted configurations may use D-shaped tanks. Switching styles usually requires different mounting hardware and brackets.