Dorman 54207 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap for Jeep Applications

This Dorman engine coolant reservoir cap is a direct replacement for a cracked, missing, or worn coolant tank cap. Built as a threaded, twist-style cap with a 31.5 mm diameter, it restores proper sealing on pressurized cooling systems used in select Jeep Cherokee, Grand Cherokee, Wrangler, Comanche, and Wagoneer applications.

Use Dorman 54207 when you need a replacement coolant reservoir cap for Jeep Cherokee and related models with the specified 31.5 mm fitment. The black plastic cap is vented and rated for 16 psi, helping maintain the cooling system’s designed pressure level.

Key Features

• Direct replacement engine coolant reservoir cap
• 31.5 mm diameter for specified Jeep cooling system applications
• Threaded, twist-on attachment for secure installation
• Pressurized design with a 16 psi maximum pressure rating
• Vented construction
• Black plastic housing
• Fits select Jeep Cherokee, Grand Cherokee, Wrangler, Comanche, and Wagoneer models

Detailed Description

Dorman 54207 is engineered to replace the original engine coolant reservoir cap on select Jeep vehicles without changing the factory-style fit. It is a pressurized cap with a threaded twist design, built from plastic and sized at 31.5 mm in diameter. For Jeep Cherokee, Jeep Grand Cherokee, Jeep Wrangler, Jeep Comanche, and Jeep Wagoneer cooling systems that call for this style of cap, it provides the correct sealing interface for the reservoir.

This part cross-references 47738496 for the same application. Dorman 54207 is a practical replacement when the original cap is damaged, lost, or no longer sealing properly.

What It Helps Solve

• Coolant reservoir cap cracking or breakage
• Loss of the original reservoir cap
• Improper sealing at the coolant tank opening
• Pressure loss in the cooling system
• Reservoir cap fitment issues on 31.5 mm Jeep applications

Installation Notes and Tips

Confirm the reservoir opening diameter and cap style before installation. Match the threaded twist design and 31.5 mm size to the original cap on the vehicle. Inspect the reservoir neck and sealing surfaces for damage before installing the new cap, and verify that the cap seats fully and turns smoothly by hand.

Fits 1987-1990 Jeep Cherokee, N/A; 1991-1996 Jeep Cherokee, N/A; 1996 Jeep Grand Cherokee, N/A; 1991-1995 Jeep Wrangler, N/A; 1991-1992 Jeep Comanche, N/A; 1987-1990 Jeep Comanche, N/A; 1987-1990 Jeep Wagoneer, N/A.

Quality Assurance

Dorman designs direct replacement parts to match original equipment fit and function for the listed applications. Part number 54207 is built to the stated diameter, pressure rating, and attachment style for the specified Jeep cooling system use.