Dorman 902-5112 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for Subaru

Dorman 902-5112 is a replacement engine coolant thermostat housing built to match the fit and durability of the original housing on specified Subaru applications. It is made from black plastic and includes a gasket for a direct cooling system service on Subaru Baja, Forester, Impreza, Legacy, and Outback models.

Key Features

• Replacement engine coolant thermostat housing for the cooling system
• Black plastic construction
• Outlet port diameter: 1.438 in.
• 180-degree housing neck angle
• Two mounting holes with 0.313 in. diameter
• Gasket or seal included
• No thermostat included
• No bleeder valve and no O-rings required

Detailed Description

This Dorman thermostat housing, part number 902-5112, is engineered for Subaru cooling system service where the original housing has cracked, warped, or begun leaking. It is designed for specified Subaru Baja, Forester, Impreza, Legacy, and Outback vehicles and follows the OE-style housing layout with a 1.438-inch outlet port and 180-degree neck angle. The included gasket supports a proper seal at installation, while the plastic housing construction is built to handle repeated temperature swings in normal engine operation. This part cross-references Gates CO34806 for the same application.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or heat-damaged plastic housing
• Warped sealing surfaces that cause seepage
• Cooling system service on Subaru engines with a failed housing
• Fitment issues when replacing an OE-style thermostat housing

Installation Notes and Tips

Verify the outlet port diameter, mounting hole spacing, and housing neck angle before installation. Transfer or install the thermostat separately, since 902-5112 does not include one. Clean the mating surface thoroughly and use the included gasket to help achieve a proper seal. Confirm vehicle application by year, make, and model before ordering.

Quality Assurance

Dorman designs replacement cooling system components to match stock fit and durability on specified vehicles. This thermostat housing is built to withstand extreme temperature changes for extended service life.