Dorman 54208 Engine Coolant Reservoir Cap

Reliable Engine Coolant Reservoir Cap for Ford, Lincoln, and Mercury Vehicles

The Dorman 54208 Engine Coolant Reservoir Cap is designed to maintain proper pressure and ventilation in your vehicle's cooling system. Compatible with a wide range of Ford, Lincoln, and Mercury models, this cap ensures efficient coolant containment and system performance.

• Durable black plastic construction for corrosion resistance
• 61mm diameter with a threaded attachment for secure fit
• Pressurized and vented design to maintain optimal cooling system pressure up to 16 psi
• Twist-type cap for easy installation and removal
• Compact size measuring 3.3 inches in length and width

Product Details and Specifications

The Dorman 54208 reservoir cap is engineered with a vented, pressurized design to help regulate coolant system pressure and prevent overheating. Its 61mm diameter and threaded attachment type provide a secure and leak-free seal on compatible coolant reservoirs. The twist-type mechanism allows for straightforward removal and installation without special tools. Constructed from durable plastic, this cap resists corrosion and withstands the demands of engine heat and pressure. The cap is designed to handle a maximum pressure rating of 16 psi, ensuring your cooling system operates within safe limits.

Compatible Vehicles and Applications

This engine coolant reservoir cap is compatible with numerous Ford, Lincoln, and Mercury models, including but not limited to the Ford F-150, Explorer, Mustang, Expedition, and Econoline series, as well as Lincoln Navigator, Continental, and Mercury Mountaineer. The Dorman 54208 cap is suitable for vehicles requiring a 61mm diameter, threaded, twist-type reservoir cap with venting and pressurization features.

Common Issues Addressed by the Reservoir Cap

• Prevents coolant leaks caused by worn or damaged caps
• Maintains proper cooling system pressure to avoid overheating
• Allows controlled venting to reduce airlocks and coolant loss
• Ensures secure attachment to prevent cap loosening during operation
• Helps maintain engine temperature stability under varying conditions

Installation Notes and Tips

• Ensure the reservoir neck is clean and free of debris before installation
• Align the cap threads carefully and twist clockwise until securely tightened
• Do not overtighten to avoid damaging the cap or reservoir threads
• Check for leaks after installation by running the engine and inspecting the cap area
• Replace the cap if it shows signs of cracking, warping, or loss of pressure integrity

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 54208 Engine Coolant Reservoir Cap undergoes rigorous quality control to ensure durability and reliable performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Refer to Dorman’s official documentation for exact warranty terms.