GDUKOP Coolant Reservoir Tank with Cap for Ford Super Duty/Excursion 2003–2007 — Direct-Fit, Heat-Resistant

The GDUKOP 603-217 front engine coolant reservoir tank with cap is a direct-fit replacement reservoir engineered to restore proper coolant containment and fit Ford 2003–2007 Super Duty trucks and the 2003–2005 Excursion.

This replacement overflow tank is molded from heat-resistant plastic and supplied with a matching cap so you can replace a cracked or leaky reservoir quickly and return your vehicle to dependable service. It matches original-equipment mounting points and hose connections for a straightforward swap, eliminating the need for trimming or adapters. Built to the OE numbers listed for many Ford Super Duty models, it offers a budget-friendly option when the factory tank shows age-related fatigue.

Will this tank fit my Ford Super Duty or Excursion?

GDUKOP designed this reservoir to match the original equipment specifications for multiple Ford models from 2003 to 2007. Check your vehicle’s year and part numbers to confirm compatibility before ordering.

• Compatible models: Ford Excursion (2003–2005) and F-250, F-350, F-450, F-550 Super Duty (2003–2007); F-350 (2005–2007)
• Replaces OE numbers such as 603-217, 3C3Z8A080AE, 6C3Z8A080A/B and other listed codes
• Exact mounting points and hose outlet locations for direct replacement

What materials and construction does the reservoir use?

The tank is formed from reinforced, heat-tolerant plastic to resist engine-bay temperatures and exposure to coolant chemicals. The material selection helps minimize warping, stress cracking, and leaks over time.

• Durable thermoplastic body resistant to heat and coolant degradation
• Molded seams and reinforced mounting bosses for long-term integrity
• Included screw-on cap designed to match pressure and sealing needs

How simple is installation and what tools are required?

Installation is straightforward because the reservoir follows OE dimensions and attachment locations. Most technicians or experienced DIYers can complete the job with common hand tools in under an hour.

• Direct replacement—no cutting, bending, or bracket fabrication needed
• Typical tools: socket set, pliers, screwdrivers, and coolant catch pan
• Refill and bleed the cooling system per manufacturer guidance after install

What performance or maintenance benefits can I expect?

Replacing a damaged or degraded reservoir restores reliable coolant containment and helps the cooling system maintain correct fluid levels. That supports steady engine temperature control during normal driving conditions.

• Prevents coolant loss from cracks or failed seals
• Maintains correct expansion capacity for the cooling system
• Reduces the chance of air pockets and improper coolant circulation

Who is this for: This GDUKOP 603-217 reservoir tank is intended for owners and technicians servicing 2003–2007 Ford Super Duty trucks and 2003–2005 Ford Excursions who need an OE-compatible replacement. It suits anyone replacing a faded, cracked, or leaking overflow tank and looking for a straightforward, cost-effective repair that restores the cooling system’s capacity and fitment without modification. Always confirm the part reference numbers and vehicle year before purchase, and follow proper coolant-handling and disposal procedures during installation.