Calorstat TH1441.75J Engine Coolant Thermostat

Engine Coolant Thermostat for Precise Temperature Control

The Calorstat TH1441.75J engine coolant thermostat is a standard replacement thermostat built to regulate coolant flow at the specified opening temperature. It includes a gasket and rubber seal for a direct service replacement in cooling system repairs.

Compatible With applications that use this thermostat design, including select BMW and Mercedes-Benz cooling system setups, the TH1441.75J supports stable engine operating temperature and consistent warm-up performance. The Calorstat TH1441.75J is also cross-referenced to Gates 33556 for the same application.

Key Features

• Standard engine coolant thermostat design
• Start to open temperature: 167.0 degrees
• Sealing flange outside diameter: 2.63
• Height between flanges: 1.02
• Gasket or seal included: Yes
• Seal type: Gasket
• Seal material: Rubber
• OE-style replacement part number: TH1441.75J

Detailed Product Description

This thermostat is designed for cooling systems that require a 167.0-degree opening point and a standard housing interface. The included gasket and rubber seal help create a proper seal at the thermostat housing, supporting reliable coolant regulation and reducing the chance of seepage at the mating surface. Calorstat TH1441.75J is a practical choice for service work where accurate temperature control matters, especially in BMW and Mercedes-Benz applications that rely on a correctly calibrated thermostat.

Part number TH1441.75J is referenced by multiple interchange numbers, including OE-style listings used in European cooling system service. If you are replacing a thermostat during a cooling system repair, this unit provides the core specifications needed for a direct-fit style replacement in the correct application.

Common Issues This Part Can Address

• Engine running cooler or hotter than normal due to thermostat wear
• Slow warm-up after cold starts
• Temperature fluctuation from a thermostat that no longer opens at the correct point
• Coolant seepage at the thermostat housing seal area
• Cooling system service needs on BMW and Mercedes-Benz vehicles using this thermostat specification

Installation Notes and Tips

Verify the thermostat housing dimensions, sealing flange diameter, and opening temperature before installation. Clean the housing mating surfaces thoroughly and replace any contaminated coolant as part of the repair. Confirm the seal is seated correctly before reassembly, and bleed the cooling system according to the vehicle manufacturer procedure after installation. For fitment-based searches, use terms such as BMW thermostat replacement TH1441.75J and Mercedes-Benz engine coolant thermostat TH1441.75J.

Quality Assurance

Calorstat supplies cooling system components for service applications that require accurate temperature control and proper sealing. This thermostat is built to the listed specifications and cross-references Gates 33556 for the same application. Use the part number TH1441.75J to confirm application match before ordering.