Dorman 603-111 Engine Coolant Reservoir - Front

Reliable Engine Coolant Reservoir for Chevrolet, GMC, and Oldsmobile

The Dorman 603-111 engine coolant reservoir is designed to provide a durable and precise fit for select Chevrolet, GMC, and Oldsmobile models. Crafted from sturdy plastic, this coolant reservoir ensures proper coolant storage and circulation to help maintain optimal engine temperature.

• Constructed from durable white plastic material
• Dimensions: 280mm length x 180mm height for accurate fitment
• Includes one coolant reservoir and one cap
• Cap type included for secure sealing
• Features two mounting holes for straightforward installation
• Non-pressurized design suitable for specific vehicle cooling systems

Detailed Product Description

The Dorman 603-111 engine coolant reservoir is engineered to meet the specifications required by Chevrolet Blazer, GMC Jimmy, Oldsmobile Bravada, Chevrolet S10, and GMC Sonoma models. Its white plastic construction offers resistance to corrosion and heat, ensuring longevity under typical engine bay conditions. The reservoir measures 280mm in length and 180mm in height, providing a precise replacement part that aligns with factory mounting points. This reservoir includes a cap designed to maintain coolant containment without pressurization, and it features two mounting holes for secure attachment. Note that mounting hardware and brackets are not included, so reusing existing components is recommended.

Common Applications and Problem Resolution

• Replaces cracked or leaking coolant reservoirs
• Prevents coolant loss and engine overheating
• Restores proper coolant level monitoring
• Eliminates coolant contamination from damaged tanks
• Addresses coolant reservoir cap failure or loss

Installation Notes and Tips

Installation of the Dorman 603-111 engine coolant reservoir requires removal of the old reservoir and careful alignment with the two mounting holes. Since mounting hardware and brackets are not included, inspect existing components for wear and replace if necessary. Ensure the included cap is properly seated to prevent coolant leaks. It is recommended to drain the cooling system partially before removal to minimize spillage. After installation, refill the coolant to the appropriate level and check for leaks during engine operation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-111 engine coolant reservoir undergoes quality checks to ensure durability and compatibility with Chevrolet Blazer, GMC Jimmy, Oldsmobile Bravada, Chevrolet S10, and GMC Sonoma vehicles. While specific warranty details are not provided here, Dorman typically offers limited warranties covering defects in material and workmanship.