Dorman 603-307 Engine Coolant Reservoir - Front

Reliable Engine Coolant Reservoir for Chrysler and Dodge Vehicles

The Dorman 603-307 engine coolant reservoir is designed to maintain optimal cooling system performance for select Chrysler and Dodge models. Engineered with durable plastic and a clear design, this reservoir allows for easy fluid level monitoring and reliable operation.

• Constructed from durable plastic material for long-lasting use
• Clear color for convenient coolant level visibility
• Includes one coolant reservoir, one spring loaded twist cap, and tubing
• Cap is pressurized with a maximum pressure rating of 17 psi
• Equipped with two mounting holes and included mounting brackets for secure installation

Detailed Product Description

The Dorman 603-307 engine coolant reservoir is specifically designed for compatibility with Chrysler 300M, Concorde, Intrepid, and LHS models. Measuring 368.1 mm in length and 234.1 mm in height, this reservoir fits precisely within the engine bay to ensure proper coolant containment and circulation. The clear plastic construction allows for quick visual checks of coolant levels without removing the cap. The included spring loaded twist cap is pressurized up to 17 psi, helping maintain system pressure and prevent coolant loss. Mounting brackets and two mounting holes provide a secure fit, although mounting hardware is not included.

Common Applications and Issues Addressed

• Replacement for cracked or leaking coolant reservoirs
• Restores proper coolant level monitoring and containment
• Prevents engine overheating due to coolant loss
• Maintains system pressure with included pressurized cap
• Eliminates coolant contamination from damaged or worn reservoirs

Installation Notes and Tips

• Verify compatibility with Chrysler 300M, Concorde, Intrepid, or LHS before installation
• Use existing mounting hardware or source appropriate fasteners as mounting hardware is not included
• Ensure all connections are secure and free of leaks after installation
• Properly bleed the cooling system to remove air pockets following replacement

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications for fit and function. The 603-307 engine coolant reservoir includes a spring loaded twist cap designed to maintain system pressure up to 17 psi. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts to ensure customer confidence and product reliability.