Dorman 603-122 Engine Coolant Reservoir - Front

Reliable Engine Coolant Reservoir for Cadillac, Oldsmobile, and Pontiac

The Dorman 603-122 engine coolant reservoir is designed to maintain optimal cooling system performance for select Cadillac, Oldsmobile, and Pontiac vehicles. Engineered with durable plastic and equipped with a pressurized cap, this reservoir supports efficient coolant storage and circulation.

• Constructed from durable plastic material for long-lasting use
• Dimensions: 269 mm length and 195 mm height for precise fitment
• Includes spring loaded twist cap rated for 18 psi maximum pressure
• Comes with mounting brackets and two mounting holes for secure installation
• Cap and coolant reservoir included in the package
• Compatible with Cadillac DeVille, Oldsmobile Aurora, and Pontiac Bonneville models

Product Details and Specifications

This engine coolant reservoir by Dorman is designed to meet the cooling system requirements of specific GM vehicles, including the Cadillac DeVille, Oldsmobile Aurora, and Pontiac Bonneville. The reservoir is made from high-quality plastic, ensuring resistance to heat and corrosion. Measuring 269 mm in length and 195 mm in height, it fits precisely within the engine bay. The included spring loaded twist cap maintains system pressure up to 18 psi, which helps prevent coolant loss and overheating. The reservoir is pressurized and comes with two mounting holes and brackets for a secure and stable fit. Although mounting hardware is not included, the brackets simplify installation.

Compatible Vehicles and Common Applications

• Replacement for engine coolant reservoir in Cadillac DeVille models
• Suitable for Oldsmobile Aurora cooling system maintenance
• Compatible with Pontiac Bonneville coolant system repairs
• Helps address coolant leaks and overheating issues
• Supports proper coolant circulation and pressure regulation

Installation Notes and Tips

Before installation, ensure the engine is cool to avoid injury from hot coolant. The Dorman 603-122 reservoir includes mounting brackets and two mounting holes but does not come with additional mounting hardware, so verify that existing bolts or screws are compatible. The spring loaded twist cap should be securely tightened to maintain system pressure. Inspect hoses and connections for wear or damage during installation to ensure a leak-free fit.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM specifications for fit, form, and function. The 603-122 engine coolant reservoir undergoes quality checks to ensure durability and performance. Please refer to Dorman's warranty policy for specific coverage details.