Dorman 902-5101CD Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

Replace a cracked, missing, or worn coolant reservoir cap with a direct-fit Dorman solution built for pressurized cooling systems. The Dorman 902-5101CD engine coolant reservoir cap uses a twist-on design and a 76.2 mm diameter for a secure seal on the coolant tank.

Compatible With applications that use a black plastic, pressurized twist cap, this part is a practical replacement for select Ford, Chrysler, and International vehicles. If you are searching for an engine coolant reservoir cap for Ford F-150, Chrysler Town & Country, or International truck cooling system service, Dorman 902-5101CD is built to match the original style and function.

• Direct replacement coolant reservoir cap for pressurized cooling systems
• Twist-on attachment type for straightforward cap replacement
• Black plastic construction
• 76.2 mm diameter for proper reservoir fit
• No vented design and no pressure release lever
• Cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application

Detailed Product Overview

The Dorman 902-5101CD is an engine coolant reservoir cap designed to replace an original cap that is cracked, lost, or no longer sealing correctly. Its pressurized, twist-style construction helps maintain cooling system pressure, while the plastic body and black finish match common OE reservoir cap designs. This part number 902-5101CD is a direct replacement option for drivers and technicians servicing Ford F-150, Chrysler Town & Country, and International applications that require this cap style and diameter.

Common Problems This Part Can Address

• Coolant loss from a cap that no longer seals properly
• Reservoir cap damage from cracking or heat exposure
• Missing cap after prior service or repair
• Cooling system pressure loss caused by a worn cap
• Fitment issues when replacing an incorrect reservoir cap style

Installation Notes and Tips

Verify the reservoir opening diameter, twist-on style, and pressure rating before installation. Inspect the coolant tank neck and sealing surface for damage, debris, or hardened residue before installing the new cap. Confirm the cap seats fully and turns to the locked position without cross-threading or binding. For vehicle-specific service, compare the original cap to Dorman 902-5101CD before final installation on Ford F-150, Chrysler Town & Country, or International cooling system applications.

Quality Assurance

Dorman designs replacement hardware to match original equipment form and function for service repairs. Part number 902-5101CD is engineered as a direct replacement coolant reservoir cap for select applications requiring a pressurized, 76.2 mm twist-on cap.