GDUKOP Front Engine Coolant Reservoir Tank with Cap — Direct-Fit 603-217, Heat-Resistant

This replacement coolant overflow tank gives you a durable, heat-resistant container engineered to match original equipment dimensions and connection points. Made to meet the OE numbers listed for Ford trucks and Excursions, the tank helps maintain correct coolant levels while resisting cracking and leaks under high under-hood temperatures. It ships as a complete unit with cap so you can swap it in without cutting hoses or fabricating mounts.

Will this reservoir fit my Ford Super Duty or Excursion?

Yes—this part is intended as a direct replacement for a range of Ford models from the early 2000s. It matches multiple OE part numbers so fitment is straightforward for compatible vehicles.

• Compatible models: 2003–2005 Excursion; 2005–2007 F-350; 2003–2007 F-250, F-350, F-450, F-550 Super Duty
• Replaces OE numbers: 603-217, 3C3Z8A080AE, 6C3Z8A080A/B and others listed
• Engineered to align with factory mounts and hose connections

How durable and heat-resistant is the GDUKOP 603-217 tank?

The tank is injection-molded from high-temperature plastic designed to tolerate typical engine-bay heat cycles and coolant exposure. That reduces the likelihood of hairline cracks and slow leaks that develop in aging OEM reservoirs.

• Heat-resistant material resists warping and brittleness
• Sturdy wall thickness to limit stress-related failure
• Resilient sealing surface for the included cap

How easy is installation and what comes in the package?

Installation is straightforward for anyone comfortable with basic under-hood work—no trimming or drilling required. The unit is shaped to match the original reservoir so it mounts using existing hardware and hoses.

• Comes complete with the correct-cap style for proper sealing
• Pre-formed inlet/outlet positions match factory hoses
• Designed for bolt-on fitment and quick replacement

What are the performance benefits of replacing a worn reservoir?

Replacing a cracked or leaking tank restores the vehicle’s ability to maintain proper coolant levels and pressure balance in the cooling system. A healthy reservoir helps the cooling system operate consistently under load and during temperature changes.

• Helps maintain coolant reserve for thermal balance
• Prevents coolant loss that can degrade engine cooling efficiency
• Reduces risk of air entering the system through failed tank fittings

Who is this for: The GDUKOP 603-217 reservoir is aimed at owners and technicians working on 2003–2007 Ford Super Duty trucks or 2003–2005 Excursions who need a reliable, OEM-compatible replacement. It's a good choice for fleet maintenance, restoration projects, or any vehicle showing signs of a brittle, cracked, or leaking coolant tank. If you want a straightforward swap that restores coolant containment and fits factory mounts and hoses, this part delivers a cost-effective, durable solution.