Dorman 603-059 Engine Coolant Reservoir - Front

Reliable Engine Coolant Reservoir for Chevrolet and Pontiac Models

The Dorman 603-059 engine coolant reservoir is designed to provide a durable and efficient solution for your vehicle's cooling system. Specifically compatible with Chevrolet Cobalt, Pontiac G4, G5, and Pursuit models, this reservoir ensures proper coolant storage and pressure management.

• Constructed from durable plastic material for long-lasting performance
• Rectangular shape measuring 7.77 inches in length and 4.75 inches in height
• Includes a pressurized coolant cap rated for up to 15 psi
• Comes with one coolant reservoir and one cap; mounting hardware and brackets are not included
• Features two mounting holes for secure installation
• White and black color scheme for easy identification under the hood
• Capacity of 750 ml to maintain optimal coolant levels

Product Details and Specifications

The Dorman 603-059 engine coolant reservoir is engineered to meet the specific requirements of select Chevrolet and Pontiac vehicles. Made from high-quality plastic, this reservoir is designed to withstand the heat and pressure of the engine cooling system. Its rectangular shape and precise dimensions (7.77 inches long by 4.75 inches high) allow for a proper fit in the engine bay. The included pressurized coolant cap supports a maximum pressure rating of 15 psi, helping to maintain system integrity and prevent coolant loss. Although mounting hardware and brackets are not included, the reservoir features two mounting holes to facilitate installation using existing vehicle components.

Compatible Vehicles and Applications

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

• Chevrolet Cobalt
• Pontiac G4
• Pontiac G5
• Pontiac Pursuit

It is designed to replace the original coolant reservoir in these vehicles, ensuring proper coolant containment and pressure regulation.

Common Issues Addressed by This Coolant Reservoir

• Coolant leaks due to cracked or damaged reservoirs
• Loss of coolant pressure affecting engine temperature regulation
• Overheating caused by insufficient coolant capacity
• Failure of the coolant cap leading to pressure loss
• Wear and tear from prolonged exposure to engine heat

Installation Notes and Tips

Before installation, ensure the engine is cool to avoid injury from hot coolant. The Dorman 603-059 reservoir includes the pressurized cap but does not come with mounting hardware or brackets, so reuse existing components or acquire compatible hardware as needed. Align the reservoir using the two mounting holes and secure it firmly to prevent movement. After installation, check for leaks and verify that the coolant level sensor (if applicable) is functioning properly, noting that this reservoir does not include a level sensor.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-059 engine coolant reservoir undergoes rigorous quality control to ensure durability and reliability in demanding automotive environments. 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.