Calorstat TH6879.89J Engine Coolant Thermostat

Engine Coolant Thermostat for Ford Focus

Calorstat TH6879.89J is an engine coolant thermostat with a plastic housing, built for precise coolant flow control in the cooling system. It is a direct-fit service part for 2012-2018 Ford Focus applications and includes a gasket and rubber seal for the housing interface.

• Engine coolant thermostat with plastic housing construction
• Black finish with 3 bolt holes for housing mounting
• Gasket included; seal type is gasket with rubber seal material
• Start-to-open temperature: 192.0
• Height between flanges: 1.57
• Fits 2012-2018 Ford Focus, N/A

Detailed Product Overview

This Calorstat thermostat assembly, part number TH6879.89J, is designed for Ford Focus cooling system service where stable operating temperature is critical. The plastic housing design and included gasket help support a proper seal at the thermostat housing connection, while the 192.0 start-to-open temperature specification provides the opening point needed for coolant regulation. Calorstat TH6879.89J also cross-references Gates 34708 for the same application.

Common Cooling System Issues It Can Address

• Engine running too cool or too warm due to thermostat control issues
• Coolant temperature fluctuation during normal driving
• Thermostat housing seepage at the sealing surface
• Check engine light concerns related to coolant temperature regulation
• Reduced heater performance caused by improper coolant flow

Installation Notes and Tips

Verify the housing style, bolt pattern, and seal condition before installation. Clean the mating surfaces thoroughly and replace any damaged coolant residue or debris that could affect sealing. Confirm the thermostat orientation and torque fasteners evenly to help maintain a leak-free fit on the Ford Focus cooling system.

Quality Assurance

Calorstat is an OE-focused cooling system brand, and this thermostat assembly is built to match the specified application requirements for 2012-2018 Ford Focus service work. Use the listed fitment and part number TH6879.89J to confirm application before ordering.