Dorman 603-345 Engine Coolant Reservoir - Front

Reliable Engine Coolant Reservoir for Ford F-250 and F-350

The Dorman 603-345 engine coolant reservoir is designed specifically for Ford F-250 Super Duty, F-350, and F-350 Super Duty models. Constructed from durable plastic, this reservoir ensures efficient coolant storage and pressure management to maintain optimal engine temperature.

• Durable plastic construction for long-lasting performance
• Compatible with Ford F-250 Super Duty, F-350, and F-350 Super Duty
• Includes spring loaded twist cap rated for 16 psi maximum pressure
• Pressurized reservoir design to maintain proper coolant flow
• Mounting brackets included with five mounting holes for secure installation
• Cap included for a complete replacement solution

Product Details and Specifications

The Dorman 603-345 engine coolant reservoir measures 436.7 mm in length and 384.4 mm in height, providing the correct fit and capacity for the specified Ford Super Duty trucks. The reservoir features a black and white color scheme and is designed to be pressurized, supporting a maximum cap pressure rating of 16 psi. The included spring loaded twist cap helps maintain system pressure and prevent coolant loss. This reservoir comes with mounting brackets and five mounting holes, ensuring a secure and stable installation without the need for additional hardware.

Purpose and Common Applications

• Replaces cracked or leaking coolant reservoirs
• Restores proper coolant pressure and flow in Ford Super Duty trucks
• Prevents engine overheating caused by coolant loss
• Eliminates coolant contamination from damaged or worn reservoirs
• Maintains system integrity after radiator or cooling system repairs

Installation Notes and Tips

Installation of the Dorman 603-345 reservoir requires removal of the old coolant reservoir and proper alignment of the mounting brackets with the five mounting holes. Since mounting hardware is not included, retain original fasteners or source compatible hardware. Ensure the spring loaded twist cap is securely tightened to maintain system pressure. Always check for leaks after installation and refill the cooling system with the appropriate coolant mixture recommended for Ford F-250 and F-350 models.

Quality Assurance and Warranty

Dorman parts are engineered to meet or exceed OEM specifications for fit, form, and function. The 603-345 engine coolant reservoir undergoes rigorous quality control to ensure durability and reliability in demanding conditions. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.