Calorstat TE6939.98J Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Calorstat TE6939.98J is an engine coolant thermostat housing assembly built with a black plastic housing and an electrical actuator. It includes a gasket and seal, and the thermostat begins to open at 208.0 degrees for temperature control in the cooling system. Compatible With 2005-2011 Ford Focus and 2001-2003 Ford Ranger applications that use this housing style.

Key Features

• Plastic thermostat housing assembly in black
• Electrical actuator type for controlled coolant flow
• Start-to-open temperature: 208.0 degrees
• Gasket included with gasket-type seal
• By-pass valve diameter: 33.0
• Jiggle pin check valve with weep hole for air bleeding
• Height between flanges: 1.57 in
• Height, by-pass side: 40.0

Detailed Description

TE6939.98J is a direct-fit style coolant thermostat housing assembly for Ford cooling system service, including Ford Focus and Ford Ranger applications listed below. The plastic housing construction, electrical actuator, and integrated sealing components support replacement of a worn or leaking thermostat housing while maintaining the original cooling-system layout. This part cross-references Dorman OE Solutions 604-208 for the same application.

Fits 2005-2011 Ford Focus, N/A. Fits 2001-2003 Ford Ranger, N/A. The Calorstat TE6939.98J part number is also useful when searching for OE-style thermostat housing replacement options for these Ford models.

Common Issues This Part Can Address

• Coolant leaks at the thermostat housing or seal surface
• Engine temperature fluctuations caused by a failing thermostat housing assembly
• Cracked or warped plastic housing from heat cycling
• Air trapped in the cooling system after service
• Improper coolant flow control from a worn electrical actuator assembly

Installation Notes and Tips

Verify the connector style, housing shape, and bypass dimensions against the original part before installation. Clean the mating surfaces thoroughly, inspect the cooling system for contamination, and refill with the correct coolant mixture after replacement. Bleed air from the system using the jiggle pin weep hole and follow the vehicle service procedure for thermostat and cooling-system service.

Quality Assurance

Calorstat is listed as an OE supplier to Ford for these applications, and TE6939.98J is built to match the specified housing style and operating temperature requirements for the covered vehicles.