Dorman 902-5403CD Engine Coolant Reservoir Cap

Reliable Engine Coolant Reservoir Cap Replacement

The Dorman 902-5403CD engine coolant reservoir cap is designed to provide a secure seal for your vehicle's coolant system. Made from durable black plastic, this twist-on cap ensures proper closure without venting or pressurization features, suitable for specific automotive applications requiring a simple, reliable coolant tank cap.

• Constructed from durable black plastic for corrosion resistance
• Measures 3 inches in width and 0.7 inches in length with a 49 mm diameter
• Twist-on attachment type for easy installation and removal
• Non-vented and non-pressurized design for compatible coolant systems
• Includes one engine coolant reservoir cap per package

Product Details and Specifications

The Dorman 902-5403CD engine coolant reservoir cap features a twist-type design that securely fastens onto the coolant tank, preventing leaks and contamination. Its 49 mm diameter fits specific reservoir openings, while the black plastic material offers resistance to heat and chemical exposure common in engine compartments. This cap does not include a pressure release lever and is neither vented nor pressurized, making it suitable for vehicles that require a sealed coolant reservoir without pressure regulation.

Compatible Vehicles and Applications

This engine coolant reservoir cap is compatible with various makes and models that specify a 49 mm diameter, twist-on style cap without venting or pressurization. It is commonly used in automotive cooling systems where a simple, secure seal is necessary to maintain coolant integrity and prevent fluid loss. For example, it fits certain Ford, Chevrolet, and Dodge models requiring a non-vented coolant tank cap. Always verify your vehicle’s coolant reservoir cap specifications before purchase.

• Prevents coolant leaks and contamination
• Replaces worn or damaged reservoir caps
• Maintains proper coolant system sealing
• Helps avoid engine overheating due to coolant loss
• Ensures compatibility with non-pressurized cooling systems

Installation Notes and Tips

Installation of the Dorman 902-5403CD cap is straightforward due to its twist-on design. Ensure the coolant reservoir neck is clean and free of debris before installation. Align the cap properly and twist until it is securely seated to prevent leaks. Avoid overtightening, which can damage the cap or reservoir neck. This cap is intended for use on non-pressurized coolant tanks; verify your vehicle’s system requirements prior to installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5403CD engine coolant reservoir cap undergoes quality checks to ensure durability and reliable performance. While specific warranty details are not provided, Dorman typically offers limited warranties on their replacement parts. Consult product documentation or your parts supplier for warranty information.