Calorstat TH7142.90J Engine Coolant Thermostat

Engine Coolant Thermostat for Mazda and Ford

The Calorstat TH7142.90J engine coolant thermostat is a plastic housing thermostat with a 194°F opening temperature for precise coolant flow control. It includes a gasket and rubber seal, plus a jiggle pin weep hole for easier air bleeding during service.

Key Features

• Plastic housing construction with black finish
• Starts to open at 194.0°F / 90°C
• Gasket or seal included
• Jiggle pin weep hole for venting trapped air
• Rubber seal material with gasket seal type
• By-pass valve diameter: 23.0
• Height between flanges: 1.53
• Height, by-pass side: 39.0

Detailed Description

Calorstat TH7142.90J is an engine coolant thermostat assembly built in a plastic housing format for controlled coolant regulation in select Mazda, Ford, and Mercury applications. The 194°F opening temperature matches common OE-style cooling system requirements for vehicles such as the Mazda 3, Mazda 6, Mazda CX-7, Mazda Tribute, Mazda B2300, Ford Transit Connect, Ford Escape, Ford Ranger, and Mercury Mariner. This part cross-references Gates 34043 for the same application.

What It Helps Address

• Engine running too cool or too hot due to thermostat sticking
• Delayed coolant circulation after cold start
• Temperature fluctuation from worn thermostat internals
• Cooling system air pockets during service
• Improper coolant flow control in 194°F applications

Installation Notes and Tips

Verify the OE part number and engine application before installation. Confirm the housing orientation, gasket sealing surfaces, and bypass valve alignment during replacement. For fitment-specific searches, this part fits 2008-2013 Mazda 3, 2009-2013 Mazda 6, 2008-2012 Mazda CX-7, 2010-2013 Ford Transit Connect, and 2005-2006 Ford Escape. Additional coverage includes 2004-2010 Mazda B2300, 2008 Ford Escape, 2008 Mercury Mariner, and 2004-2006 Ford Ranger.

Quality Assurance

Calorstat is an OE-focused brand in cooling system components, and this thermostat is specified with the correct opening temperature, seal type, and housing material for the listed applications. Always confirm fitment by year, make, model, and engine configuration before service.