Dorman 603-055 Engine Coolant Reservoir - Front

Overview of Dorman Engine Coolant Reservoir 603-055

The Dorman 603-055 engine coolant reservoir is designed for reliable coolant storage and management in select Ford and Mercury vehicles. This replacement reservoir is engineered to meet the specifications required for the Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer models.

• Constructed from durable white plastic material
• Measures 524 mm in length and 249 mm in height
• Includes one coolant reservoir and one flip-top cap
• Equipped with two mounting holes for secure installation
• Cap included with flip-top design for easy access
• Non-pressurized reservoir design
• No mounting hardware or brackets included

Detailed Product Description

The Dorman 603-055 engine coolant reservoir is made from sturdy plastic, providing a lightweight yet durable solution for coolant containment. Its white color allows for easy fluid level inspection. The reservoir measures 524 mm in length and 249 mm in height, dimensions that align with the original equipment specifications for the Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer. This part includes a flip-top cap, which simplifies coolant refilling and maintenance. The reservoir is non-pressurized, consistent with the design of the original component, and features two mounting holes to ensure a secure fit. Note that mounting hardware and brackets are not included, so reusing existing components or purchasing separately may be necessary.

Compatible Vehicles and Applications

This engine coolant reservoir is compatible with the following vehicles:

• Ford Explorer (various model years)
• Ford Explorer Sport Trac
• Mercury Mountaineer

It is intended as a direct replacement for the factory coolant reservoir, helping to maintain proper engine temperature regulation and prevent overheating issues.

Common Issues Addressed by This Coolant Reservoir

• Coolant leaks due to cracked or damaged reservoir tanks
• Inaccurate coolant level readings from discolored or warped reservoirs
• Coolant overflow caused by faulty or missing caps
• Engine overheating resulting from coolant loss
• Replacement of worn or brittle plastic reservoirs

Installation Notes and Tips

When installing the Dorman 603-055 coolant reservoir, ensure the vehicle is cool to avoid injury from hot coolant. Use the existing mounting hardware or acquire compatible brackets as this product does not include them. Verify that the two mounting holes align properly with the vehicle’s mounting points. Fill the reservoir with the appropriate coolant type recommended by the vehicle manufacturer and securely close the flip-top cap to prevent leaks.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-055 engine coolant reservoir undergoes quality inspections to ensure durability and performance. Warranty coverage details should be confirmed through the product documentation or manufacturer directly.