Dorman 603-668 Engine Coolant Reservoir

Reliable Engine Coolant Reservoir for Buick, Chevrolet, and Pontiac

The Dorman 603-668 engine coolant reservoir is designed to provide a durable and clear solution for your vehicle's cooling system. Compatible with select Buick, Chevrolet, and Pontiac models, this reservoir ensures proper coolant storage and monitoring.

• Constructed from durable plastic material for long-lasting use
• Clear color allows easy coolant level inspection
• Dimensions: 10.75 inches length and 11.5 inches height
• Includes a flip-top cap for secure sealing and easy access
• Comes with 2 mounting holes for straightforward installation
• Capacity of 1.5 liters to meet cooling system requirements
• Cap included; mounting hardware and brackets not included

Product Details and Specifications

The Dorman 603-668 engine coolant reservoir is designed with an irregular shape to fit specific engine compartments in Buick Allure, Chevrolet Impala, Monte Carlo, and Pontiac Grand Prix and LaCrosse models. Its clear plastic construction allows for quick visual checks of coolant levels without removing the cap. The flip-top cap is included and provides a non-pressurized seal, suitable for the cooling systems of these vehicles. With two mounting holes, the reservoir can be securely attached, although mounting hardware and brackets are not part of the package. The 1.5-liter capacity supports efficient coolant storage and circulation.

Compatible Vehicles and Common Applications

This engine coolant reservoir is compatible with the following makes and models:

• Buick Allure and LaCrosse
• Chevrolet Impala and Monte Carlo
• Pontiac Grand Prix

It is designed to replace worn or damaged coolant reservoirs that may cause issues such as leaks, overheating, or coolant contamination.

• Leaking or cracked coolant reservoir
• Coolant level sensor malfunctions (note: sensor not included)
• Coolant overflow or spillage
• Damaged or missing reservoir cap
• Coolant contamination due to reservoir damage

Installation Notes and Tips

Installation of the Dorman 603-668 reservoir requires removal of the old reservoir and securing the new one using the existing mounting points. Since mounting hardware and brackets are not included, retain original components or source compatible hardware separately. Ensure the flip-top cap is properly seated to prevent coolant leaks. Check for proper hose connections and coolant levels after installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 603-668 engine coolant reservoir undergoes quality checks to ensure durability and reliability. Please refer to Dorman's warranty policy for specific coverage details.