Calorstat TH7071.87J Engine Coolant Thermostat

Engine Coolant Thermostat for Mercedes-Benz

Calorstat TH7071.87J is an engine coolant thermostat with an aluminum housing, built for Mercedes-Benz cooling system service where accurate temperature control matters. It opens at 188.0 degrees and includes a gasket and rubber seal for a direct-fit replacement approach.

• Engine coolant thermostat with aluminum housing
• Start-to-open temperature: 188.0 degrees
• Silver finish with 3 bolt holes
• Gasket included; seal type: gasket
• Rubber seal material for housing sealing
• Height between flanges: 1.03

Detailed Product Overview

This Calorstat thermostat, part number TH7071.87J, is specified for Mercedes-Benz cooling system applications that require stable coolant flow regulation. The aluminum housing and 3-bolt design support a secure mounting interface, while the included gasket and rubber seal help complete the sealing surface at installation. Calorstat TH7071.87J cross-references Motorad 623-189 for the same application.

Compatible With Mercedes-Benz Sprinter 2500, Mercedes-Benz Sprinter 3500, Mercedes-Benz Sprinter 3500XD, Mercedes-Benz E350, Mercedes-Benz R350, Mercedes-Benz GL350, Mercedes-Benz ML350, Mercedes-Benz E320, Mercedes-Benz GL320, Mercedes-Benz ML320, and Mercedes-Benz R320 across the listed model years. Fits 2010-2022 Mercedes-Benz Sprinter 2500, N/A; Fits 2010-2022 Mercedes-Benz Sprinter 3500, N/A; Fits 2018-2022 Mercedes-Benz Sprinter 3500XD, N/A; Fits 2011-2013 Mercedes-Benz E350, N/A; Fits 2010-2013 Mercedes-Benz R350, N/A; Fits 2010-2012 Mercedes-Benz GL350, N/A; Fits 2010-2011 Mercedes-Benz ML350, N/A; Fits 2007-2009 Mercedes-Benz E320, N/A; Fits 2007-2009 Mercedes-Benz GL320, N/A; Fits 2007-2009 Mercedes-Benz ML320, N/A; Fits 2007-2009 Mercedes-Benz R320, N/A.

Common Cooling System Issues

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuation caused by a worn thermostat
• Coolant flow control problems in Mercedes-Benz Sprinter and SUV/sedan applications
• Leakage at the thermostat housing seal area
• Cooling system service needs tied to thermostat replacement

Installation Notes and Tips

Verify the housing style, bolt-hole count, and temperature rating before installation. Clean the mating surfaces thoroughly and replace the gasket/seal during service to help maintain a proper seal. Confirm the part number TH7071.87J against the vehicle’s original thermostat specification before final assembly.

Quality Assurance

Calorstat is listed as an OE supplier to Mercedes-Benz, and this thermostat is built to match the specified application details for the covered Sprinter, E-Class, M-Class, and R-Class vehicles.