Dorman 603-256 Engine Coolant Reservoir - Front

Overview of Dorman Engine Coolant Reservoir 603-256

The Dorman 603-256 engine coolant reservoir is designed for select Mercedes-Benz models, including the GL320, GL350, GL450, GL500, GL550, ML63 AMG, ML320, ML350, ML450, ML500, ML550, and SLS AMG. This pressurized coolant reservoir helps maintain optimal engine temperature by securely storing and regulating coolant flow.

• Constructed from durable plastic with black and clear coloring for easy fluid level monitoring
• Measures 9.5 inches in length and 8 inches in height with an irregular shape for precise fitment
• Includes one mounting bracket and one mounting hole for secure installation
• Equipped with a pressurized cap rated up to 20.3 psi, included in the package
• 1.5-liter coolant capacity suitable for specified Mercedes-Benz models

Detailed Product Description

The Dorman 603-256 engine coolant reservoir is engineered to meet the specifications of various Mercedes-Benz vehicles, ensuring reliable coolant storage and pressure management. Made from high-quality plastic, the reservoir features a black and clear design that allows for quick visual inspection of coolant levels. Its irregular shape and precise dimensions (9.5 inches long by 8 inches high) are tailored to fit the engine compartments of models such as the GL320, GL350, and ML63 AMG. The included pressurized cap, rated at 20.3 psi, helps maintain system pressure to prevent overheating and coolant loss. The reservoir comes with one mounting bracket and a single mounting hole to facilitate proper and secure installation.

Common Applications and Problem Resolution

• Replacement for cracked or leaking coolant reservoirs in Mercedes-Benz GL and ML series vehicles
• Addresses coolant overflow and pressure loss issues
• Prevents engine overheating caused by insufficient coolant containment
• Restores proper coolant system pressure with included pressurized cap
• Helps maintain coolant levels to avoid engine damage

Installation Notes and Tips

When installing the Dorman 603-256 coolant reservoir, ensure the mounting bracket aligns with the existing mounting hole on your Mercedes-Benz model. The pressurized cap should be securely tightened to maintain the correct system pressure. It is recommended to inspect hoses and connections for wear or damage during installation. Always use the correct coolant type specified by the vehicle manufacturer to ensure optimal performance.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-256 engine coolant reservoir undergoes rigorous quality control to ensure durability and reliability. Please refer to Dorman's warranty policy for specific coverage details.