Dorman 902-5052 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for Subaru

This Dorman engine coolant thermostat housing is a direct replacement for specified Subaru cooling systems. Built from metal with a natural finish, it is engineered to match stock fit and durability while handling repeated temperature swings in daily driving and performance use.

Key Features

• Direct replacement thermostat housing for Subaru cooling system service
• Metal construction for strength and heat resistance
• Includes gasket for a proper seal at installation
• Outlet port diameter: 1.438 in.
• Two mounting holes with 0.313 in. diameter
• 180-degree housing neck angle
• No thermostat included
• No air vent (bleeder valve) and no bolts included

Detailed Description

Dorman 902-5052 is an engine coolant thermostat housing designed for Subaru WRX STI, WRX, Impreza, Forester, Legacy, Outback, and Baja applications listed below. It is built to match the original housing’s fit and durability, with a metal body that stands up to extreme temperature changes in the cooling system. The included gasket helps support a secure seal, while the 180-degree neck angle and 1.438-inch outlet port diameter align with the specified OE-style configuration. This part cross-references Motorad CH6052 for the same application.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or warped housing surfaces
• Cooling system service issues caused by a worn housing seal
• Improper thermostat housing fit on Subaru cooling repairs
• Heat-related housing deterioration from repeated temperature cycling

Fitment

• Fits 2013-2021 Subaru WRX STI, N/A
• Fits 2012-2016 Subaru WRX, N/A
• Fits 2002-2014 Subaru Impreza, N/A
• Fits 2004-2013 Subaru Forester, N/A
• Fits 2005-2012 Subaru Legacy, N/A
• Fits 1991-1994 Subaru Legacy, N/A
• Fits 2005-2012 Subaru Outback, N/A
• Fits 2009 Subaru Impreza, N/A; Cover; H4 2.0L (1994cc)
• Fits 2004-2006 Subaru Baja, N/A

Installation Notes

Verify the outlet port diameter, mounting hole spacing, and housing neck angle before installation. Transfer or install the thermostat separately, since this housing does not include one. Inspect the mating surfaces and cooling passages, and replace the gasket if the sealing surface is damaged or contaminated.

Quality Assurance

Dorman designs this replacement thermostat housing to match the fit and durability of the original Subaru part and to withstand extreme temperature changes for extended service life.