Dorman 902-5131 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-5131 is a replacement engine coolant thermostat housing assembly built for specified Acura and Honda applications. It matches the stock housing’s fit and durability requirements while using a plastic housing with a gasket seal and integrated thermostat for direct cooling-system service.

Key Features

• Plastic housing in black finish
• Integrated thermostat set to open at 172 Deg. F
• Gasket included for sealing at installation
• One outlet port and three mounting holes
• Replacement design for stock-style cooling system service
• Engineered to handle repeated temperature swings

Detailed Description

This Dorman thermostat housing assembly, part number 902-5131, is built for vehicles that use an integrated cover-style coolant thermostat housing. It is a direct replacement for the original housing on 2002-2006 Acura RSX, 2002-2006 Honda CR-V, and 2002-2005 Honda Civic applications. The housing is made from plastic and includes the thermostat and gasket needed for a proper seal at the coolant outlet.

With a 1.07 inside diameter, 3 mounting holes, and a 172 Deg. F thermostat opening temperature, this assembly is suited for restoring normal coolant flow control in the engine cooling system. The black housing is shaped to match the stock layout, helping maintain proper fit on Acura RSX, Honda CR-V, and Honda Civic models that use this configuration. This part cross-references Gates 33949 for the same application.

Common Problems This Part Can Address

• Coolant leaks at the thermostat housing
• Cracked or warped plastic housing
• Sticking thermostat that affects engine temperature control
• Failed gasket seal at the housing joint
• Cooling-system service on Acura RSX, Honda CR-V, or Honda Civic models with integrated cover housing

Installation Notes and Tips

• Drain coolant before removing the original housing.
• Clean the mating surface thoroughly before installing the new gasket.
• Verify hose routing and outlet alignment before tightening fasteners.
• Use the vehicle’s service procedure for coolant refill and air bleeding after installation.
• Confirm the replacement matches the original integrated cover-style housing before installation.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match stock fit and durability requirements for the listed vehicles. The housing is built to withstand extreme temperature changes for extended service life in normal cooling-system operation.