Four Seasons 85690 Engine Coolant Thermostat Housing

Integrated Thermostat Housing for Ford and Mazda

Four Seasons 85690 is an integrated engine coolant thermostat housing built for specific Ford and Mazda applications. It combines the thermostat housing and thermostat in one assembly, with a plastic housing, included gasket or seal, and a three-hole mounting pattern for a direct replacement on listed vehicles.

Compatible With 2005-2011 Ford Focus, 2001-2003 Ford Ranger, 2001 Ford F-100 Ranger, and 2001-2003 Mazda B2300 applications that use the integrated thermostat housing design. Four Seasons 85690 is built to meet or exceed OEM requirements and is listed with application-specific sensor and thermostat notes where applicable.

Key Features

• Integrated thermostat housing design with thermostat included
• Plastic construction for OE-style coolant system replacement
• Gasket or seal included for installation
• Three mounting holes with 1.98 in. bolt hole center spacing
• Outlet port diameter: 32.500
• Inlet port diameter: 1.124
• Flange thickness: 0.456 in.
• Overall height: 3.207 in.
• Meets or exceeds OEM specifications

Product Details

Four Seasons Thermostat Housing 85690 is an integrated thermostat housing assembly for engine coolant service. The housing is designed around the thermostat and coolant outlet interface, helping restore proper coolant flow control on the listed Ford Focus, Ford Ranger, and Mazda B2300 applications. This part cross-references Gates 34042 for the same application.

Common Cooling System Issues

• Cracked or warped thermostat housing
• Coolant leaks at the housing or seal surface
• Improper thermostat operation from a worn integrated assembly
• Overheating caused by restricted coolant flow control
• Fitment issues on vehicles requiring the integrated housing style

Installation Notes

• Verify engine code, sensor configuration, and housing style before installation.
• Clean the mating surfaces thoroughly before fitting the new housing and seal.
• Confirm hose and port alignment with the 32.500 outlet and 1.124 inlet dimensions.
• Follow the vehicle service procedure for coolant refill and air bleeding after installation.
• Use the listed application notes for 2005-2011 Ford Focus, 2001-2003 Ford Ranger, 2001 Ford F-100 Ranger, and 2001-2003 Mazda B2300 to confirm the correct configuration.

Quality Assurance

Four Seasons 85690 is an OEM-style replacement thermostat housing engineered to meet or exceed original equipment requirements for the listed applications. The Four Seasons Thermostat Housing line focuses on direct-fit cooling system components for service replacement on Ford and Mazda vehicles.