Dorman 902-5202 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

Replace a cracked or missing coolant reservoir cap with a direct-fit Dorman solution built for a secure twist-on seal. Dorman 902-5202 is a metal, pressurized engine coolant reservoir cap with a 68.58 mm diameter and a 20 psi pressure rating for vehicles that use this style of coolant tank cap.

For drivers searching for a coolant reservoir cap for Honda Civic, Toyota Corolla, or similar applications, this Dorman 902-5202 cap provides a straightforward OE-style replacement. It is a natural-finish metal cap with no vent and no pressure release lever.

Key Features

• Direct replacement engine coolant reservoir cap
• Metal construction with natural finish
• Twist-on attachment type for secure installation
• Pressurized design rated to 20 psi
• 68.58 mm diameter for proper tank-cap fitment
• No vent and no pressure release lever
• Fits applications using a twist-style coolant tank cap

Detailed Product Overview

Dorman 902-5202 is engineered as a replacement coolant reservoir cap for vehicles that require a pressurized, twist-on cap in this size and pressure range. The metal construction supports consistent sealing at the coolant tank opening, helping maintain system pressure where the original cap has cracked, warped, or gone missing. This part cross-references Monroe Shocks & Struts (e.g., 572.2001, 0517223002) for the same application. If you are servicing a Honda Civic, Toyota Corolla, or another vehicle using this cap specification, Dorman 902-5202 offers a direct replacement format that matches the original style.

What It Helps Fix

• Cracked coolant reservoir cap
• Lost or missing coolant tank cap
• Coolant loss from a poor cap seal
• Pressure retention issues at the reservoir
• Cap fitment problems caused by worn threads or damaged twist-on hardware

Installation Notes and Tips

Confirm the reservoir opening diameter, pressure rating, and attachment style before installation. This cap uses a twist-on design and is not vented. Make sure the sealing surface on the coolant tank is clean and free of debris before installing the cap. Verify that the replacement matches the original 68.58 mm size and 20 psi specification for your vehicle.

Quality Assurance

Dorman designs this coolant reservoir cap as a direct replacement part for the original equipment style. Part number 902-5202 is built to match the specified size, pressure rating, and attachment type for proper service replacement.