Dorman 54208 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

Dorman 54208 is a direct replacement engine coolant reservoir cap for vehicles that need a threaded, pressurized cap with a 61 mm diameter and 16 psi maximum pressure rating. It is built from black plastic with a vented twist design to restore a secure seal on the coolant reservoir.

Use this cap when the original reservoir cap is cracked, missing, or no longer sealing properly. Dorman 54208 is also listed for select Ford, Lincoln, and Mercury applications, including Ford F-150, Explorer, Taurus, and related models.

Key Features

• Direct replacement engine coolant reservoir cap
• 61 mm diameter with threaded twist-on attachment
• 16 psi maximum pressure rating
• Vented and pressurized design
• Black plastic construction
• Fits select Ford, Lincoln, and Mercury vehicles
• Part number: 54208

Detailed Product Description

This Dorman coolant reservoir cap is engineered to replace a damaged or lost original cap without changing the reservoir setup. The threaded twist style helps create a secure fit, while the vented, pressurized design supports proper cooling system operation. The cap measures 3.3 inches by 3.3 inches and is made from plastic for a straightforward OE-style replacement.

This part cross-references Anchor 10238 for the same application. It is also associated with OE reference 9C3Z8101B. Common search terms for this part include Ford F-150 coolant reservoir cap replacement, Ford Explorer coolant reservoir cap 61 mm, and Lincoln Navigator engine coolant reservoir cap.

What This Part Helps Solve

• Cracked coolant reservoir cap
• Lost or missing reservoir cap
• Coolant system pressure loss from a poor seal
• Reservoir cap that no longer threads on correctly
• Cooling system service on select Ford, Lincoln, and Mercury vehicles

Installation Notes and Tips

Verify the reservoir opening diameter, thread style, and pressure rating before installation. This cap uses a threaded twist-on attachment and is intended for pressurized, vented reservoir applications. Confirm vehicle-specific fitment for your year, make, and model before ordering, especially on Ford F-150, Explorer, Taurus, and E-Series applications.

Quality Assurance

Dorman manufactures this replacement cap as a direct-fit service part for select applications. It is built to match the original cap’s basic form and function for dependable reservoir sealing and cooling system maintenance.