Calorstat TH5075.88 Engine Coolant Thermostat

Engine Coolant Thermostat for Mazda and Mitsubishi

Calorstat TH5075.88 is a standard engine coolant thermostat built for precise coolant flow control in select Mazda, Mitsubishi, and Dodge applications. It opens at 190.0°F (88°C) and uses an off-set valve seat design to support stable engine temperature regulation.

Compatible With 2001-2005 Mazda Miata, 2001-2003 Mazda Protege, 1995-1996 Mitsubishi Diamante, 1995-1996 Mitsubishi Mighty Max, 1995-1996 Mitsubishi Mirage, and 1995 Dodge Colt. The TH5075.88 part number is also referenced by multiple aftermarket listings for the same application.

• Standard engine coolant thermostat for cooling system service
• Start-to-open temperature: 190.0°F / 88°C
• Off-set valve seat design for application-specific fitment
• Sealing flange outside diameter: 2.04 in.
• Height between flanges: 0.74 in.
• Gasket or seal not included

Detailed Product Overview

Calorstat TH5075.88 is designed for vehicles that require a 190°F thermostat to maintain proper operating temperature and coolant circulation. Its standard construction and off-set valve seat support direct replacement service in cooling systems where thermostat response and housing dimensions matter. This thermostat is a fitment-based replacement for Mazda Miata and Mazda Protege models, along with select Mitsubishi Diamante, Mighty Max, Mirage, and Dodge Colt applications.

This part cross-references Stant 45869 and Motorad 240-192 for the same application. The TH5075.88 part number should be matched to the vehicle’s original thermostat specification before installation.

Common Problems This Part May Address

• Engine running cooler or hotter than specified
• Delayed coolant circulation after startup
• Temperature fluctuation during normal driving
• Thermostat replacement during cooling system repair
• Restoring correct operating temperature on Mazda Miata, Mazda Protege, and select Mitsubishi models

Installation Notes and Tips

Verify the thermostat opening temperature, flange dimensions, and housing style against the original part before installation. Because no gasket or seal is included, confirm the required sealing component separately. Clean the thermostat housing mating surfaces and refill the cooling system with the correct coolant mixture after service.

Quality Assurance

Calorstat cooling system components are built for direct-fit replacement use in specified applications. Confirm fitment by year, make, model, and thermostat specification before ordering TH5075.88.