Dorman 54216 Engine Coolant Reservoir Cap

Reliable Engine Coolant Reservoir Cap for Buick, Cadillac, Chevrolet

The Dorman 54216 engine coolant reservoir cap is designed to maintain proper pressure and ventilation in your vehicle's cooling system. Compatible with select Buick, Cadillac, and Chevrolet models, this cap ensures efficient coolant containment and system performance.

• Durable black plastic construction
• 49.5 mm diameter for precise fit
• Threaded attachment type for secure installation
• Pressurized and vented design to regulate cooling system pressure
• Twist-type cap without a pressure release lever
• Compact size: 2 inches in length and width

Product Details and Specifications

The Dorman 54216 engine coolant reservoir cap is engineered with a vented, pressurized design to maintain an 18 psi maximum pressure rating, helping to prevent coolant loss and overheating. Its black plastic material offers resistance to heat and corrosion, suitable for the demanding environment of the engine bay. The threaded, twist-type cap ensures a tight seal on the coolant reservoir, compatible with specific Buick, Cadillac, and Chevrolet vehicles including the Corvette, DTS, Lucerne, and XLR models. Measuring 49.5 mm in diameter and 2 inches in both length and width, this cap fits precisely to maintain system integrity.

Compatible Vehicles and Applications

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

• Buick Lucerne
• Cadillac DTS
• Cadillac XLR
• Chevrolet Corvette

Use the Dorman 54216 cap to address common cooling system issues such as:

• Coolant leaks due to worn or damaged caps
• Loss of system pressure causing engine overheating
• Improper ventilation leading to coolant overflow
• Contamination from external debris entering the reservoir
• Failure to maintain correct pressure affecting cooling efficiency

Installation Notes and Tips

Installation of the Dorman 54216 engine coolant reservoir cap is straightforward. Ensure the engine is cool before removing the old cap to avoid injury from hot coolant or steam. Clean the reservoir neck to remove any debris or residue before threading on the new cap. Twist the cap firmly until it is securely seated to maintain proper pressure and prevent leaks. Regular inspection of the cap during routine maintenance is recommended to ensure continued performance.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 54216 engine coolant reservoir cap undergoes quality checks 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. Refer to the product packaging or Dorman’s official documentation for exact warranty terms.