Dorman 902-5921 Engine Coolant Thermostat Housing - Upper

Engine Coolant Thermostat Housing

Dorman 902-5921 is a metal engine coolant thermostat housing built to match the fit and durability of the original housing on specified vehicles. It is made for cooling system service where stable sealing and resistance to temperature swings matter, including Mitsubishi Eclipse, Endeavor, and Galant applications.

Key Features

• Metal construction with a natural finish
• Outlet port diameter: 1.5 in.
• Three mounting holes with 0.375 in. mounting hole diameter
• No gasket or seal included; O-rings not required
• No bleeder valve and no thermostat included
• Package contents: thermostat housing

Detailed Description

This Dorman thermostat housing, part number 902-5921, is engineered as a direct replacement for the stock engine coolant thermostat housing on select Mitsubishi, Chrysler, and Dodge vehicles. The metal housing is designed to handle repeated heat cycling in the cooling system while maintaining the correct mounting and outlet configuration for service replacement. This part cross-references Dayco 85046 and Gates CO34784 for the same application.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or warped original housing surfaces
• Improper sealing from heat-damaged housing material
• Cooling system service issues on Mitsubishi Eclipse, Endeavor, and Galant models
• Upper housing replacement needs on Chrysler Sebring and Dodge Stratus applications

Installation Notes and Tips

Verify the outlet port diameter, mounting hole count, and position before installation. This housing does not include a gasket or seal, bolts, or thermostat, so reuse or replace related components as required by the vehicle service procedure. Confirm the application matches the exact year, make, model, and position before assembly.

Quality Assurance

Dorman designs replacement cooling system components to match stock fit and durability requirements for specified vehicles. Part number 902-5921 is built for direct-fit service on listed applications, including Fits 2000-2012 Mitsubishi Eclipse, N/A; Fits 2004-2011 Mitsubishi Endeavor, N/A; Fits 1999-2009 Mitsubishi Galant, N/A; Fits 2001-2005 Chrysler Sebring, Upper; and Fits 2001-2005 Dodge Stratus, Upper.