Dorman 603-311 Non-Pressurized Coolant Reservoir Tank

The Dorman 603-311 is a non-pressurized coolant reservoir designed to replace worn or damaged original equipment on specific vehicle applications. This overflow tank provides a collection point for excess coolant that expands during normal engine operation, helping maintain proper cooling system function.

Key Features:

• Direct replacement for original equipment on specific applications
• Non-pressurized design for overflow coolant collection
• Durable construction for reliable long-term performance
• Includes necessary mounting provisions for secure installation
• Helps prevent coolant loss and maintain proper system levels

This coolant reservoir is manufactured to meet or exceed OEM specifications, ensuring proper fit and function. The non-pressurized design means it operates at atmospheric pressure, serving as an expansion tank that collects coolant displaced by thermal expansion. Regular inspection and replacement of damaged coolant reservoirs helps prevent leaks and maintain cooling system efficiency.