Dorman 603-099 Engine Coolant Reservoir - Front

Overview of Dorman Engine Coolant Reservoir for Cadillac CTS

The Dorman 603-099 engine coolant reservoir is designed specifically for Cadillac CTS models, providing a reliable solution for your vehicle's cooling system. Made from durable plastic with a clear finish, this reservoir allows for easy fluid level monitoring and is built to meet the demands of pressurized cooling systems.

• Constructed from durable plastic material
• Clear color for easy coolant level visibility
• Dimensions: 148 mm length and 227 mm height
• Includes one coolant reservoir and one spring loaded twist cap
• Cap is pressurized with a maximum pressure rating of 15 psi
• Three mounting holes for secure installation
• Cap included with the reservoir for convenience
• Compatible with Cadillac CTS models

Detailed Product Description

The Dorman 603-099 engine coolant reservoir is engineered to maintain optimal coolant levels in Cadillac CTS vehicles. Its plastic construction ensures resistance to corrosion and heat, while the clear design allows for quick visual checks of coolant levels without removing the cap. The included spring loaded twist cap is pressurized up to 15 psi, helping to maintain system pressure and prevent coolant loss. With three mounting holes, the reservoir can be securely attached to the engine bay, although mounting hardware and brackets are not included. This part is a direct replacement designed to meet or exceed OEM specifications for fit and function.

Common Applications and Issues Addressed

• Replacement for cracked or leaking coolant reservoirs
• Solves coolant overflow or underfill problems
• Prevents engine overheating due to coolant loss
• Restores proper pressure in the cooling system
• Eliminates coolant contamination from damaged reservoirs

Installation Notes and Tips

• Ensure the engine is cool before removing the old reservoir
• Check for any damaged hoses or fittings during installation
• Use the existing mounting hardware or source compatible fasteners
• Verify the spring loaded twist cap seals properly after installation
• Refill the reservoir with the recommended coolant type for Cadillac CTS

Quality Assurance and Warranty

Dorman parts are manufactured to meet industry standards for durability and performance. The 603-099 engine coolant reservoir undergoes quality checks to ensure proper fitment and function for Cadillac CTS vehicles. While specific warranty details are not provided, Dorman typically offers limited warranties on their replacement parts to cover defects in material and workmanship.