International S1700-S1900 Fuel Tanks

Frequently Asked Questions About International S1700-S1900 Fuel Tanks

What are the exact model years and series compatibility for these fuel tanks?

These fuel tanks are designed specifically for International S-Series trucks from model years 1979-2004, including the S1700, S1800, and S1900 models. Before ordering, verify your truck's OEM and model designation as some mid-year production changes may affect fitment. The S1700 and S1800 typically use the same tank configurations, while S1900 models may require different mounting brackets depending on wheelbase and cab configuration.

What materials are these tanks made from, and how do they compare to OEM quality?

Our replacement fuel tanks are constructed from aluminum. Aluminum tanks offer superior corrosion resistance and weight savings of approximately 30-40 pounds compared to steel versions. All tanks meet or exceed DOT requirements.

What installation challenges should I expect, and what additional parts might I need?

Installation typically requires 3-4 hours for an experienced technician. Common challenges include removing corroded mounting straps and dealing with seized fuel sending unit lock rings. You'll need new mounting straps (sold separately), fuel hoses, clamps, and potentially a new sending unit gasket. Some installations may require slight modification of existing brackets, especially when replacing a steel tank with an aluminum one due to dimensional differences. We recommend having a fuel transfer pump on hand to safely remove remaining fuel from your old tank.

What tank capacities and configurations are available for my specific truck?

Standard configurations include 50, 75, 100, and 120-gallon capacities in both round and D-shaped styles. S1700/S1800 models typically use 50 or 75-gallon tanks, while S1900 models can accommodate up to 120-gallon units depending on frame rail spacing. D-shaped tanks maximize capacity in tight spaces and are common on trucks with dual tank setups. Step tanks are available for models with back-of-cab access needs. Measure your existing tank dimensions and frame rail clearance before ordering to ensure proper fit.

Do these tanks come with all necessary fittings, and are they compatible with my existing fuel system?

Tanks come with standard NPT threaded bungs for fuel pickup, return, and vent connections that match OEM specifications. However, sending units, fuel pickups, and mounting hardware are sold separately to allow customization for your specific application. Most tanks feature 5-hole sending unit patterns compatible with Stewart Warner and Rochester gauges common in S-Series trucks. For trucks with in-tank fuel pumps, verify pump module compatibility as some aftermarket tanks may require adapter rings or different pump assemblies.