Calorstat TH6267.78 Engine Coolant Thermostat

Engine Coolant Thermostat for Honda and Acura

Calorstat TH6267.78 is a standard engine coolant thermostat built for Honda and Acura applications that call for a 78 C / 172 F opening temperature. It uses an off-set valve seat design and is specified without a gasket or seal, making it a direct-match service part for cooling system repairs on vehicles such as the Honda Civic, Honda CR-V, and Acura Integra.

• Standard engine coolant thermostat for precise coolant flow control
• Starts to open at 172 F / 78 C
• Off-set valve seat design
• Sealing flange outside diameter: 2.04 in.
• Height between flanges: 1.31 in.
• Gasket or seal not included
• Cross-references Gates 33340S and Stant 45877 for the same application

Fitment and Application Details

Calorstat TH6267.78 is used in cooling systems where the thermostat must regulate engine temperature at the OE-style 78 C / 172 F opening point. It is listed for a wide range of Honda and Acura models, including Fits 1995-2005 Honda Civic, N/A; Fits 2012-2020 Honda Civic, N/A; Fits 2017-2020 Honda CR-V, N/A; Fits 1997-2001 Honda CR-V, N/A; Fits 2007-2013 Honda Fit, N/A; Fits 2015-2020 Honda Fit, N/A; Fits 2011-2016 Honda CR-Z, N/A; Fits 2010-2014 Honda Insight, N/A; Fits 1995-2002 Honda Accord, N/A; Fits 1995-2001 Honda Odyssey, N/A; Fits 1995-2001 Acura Integra, N/A; Fits 1997-1999 Acura CL, N/A; Fits 1999 Acura TL, N/A; Fits 2013-2014 Acura ILX, N/A; Fits 1995-1997 Honda Civic del Sol, N/A; and Fits 1995-1996 Honda Prelude, N/A.

This part number, TH6267.78, also appears in interchange listings with multiple Honda OE references and aftermarket equivalents, including TH6267.78J, helping simplify lookup when servicing the cooling system on Honda Civic and Honda CR-V models.

What This Thermostat Helps Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuations caused by a thermostat that no longer opens at the correct point
• Cooling system service on Honda Civic, Honda CR-V, Honda Fit, and Acura applications
• Replacement of a thermostat with an off-set valve seat configuration
• Restoration of proper coolant circulation through the radiator and engine

Installation Notes and Tips

Verify the thermostat housing style, sealing flange diameter, and opening temperature before installation. Because no gasket or seal is included, confirm the correct sealing component is on hand for the specific Honda or Acura application. Always inspect the housing, coolant condition, and mating surfaces during service, and follow the vehicle manufacturer’s cooling system bleed procedure after installation.

Quality Assurance

Calorstat TH6267.78 is built to match the specified thermostat dimensions and temperature rating for the listed Honda and Acura applications. The part number is supported by multiple interchange references, including Gates 33340S and Stant 45877, which helps confirm application matching during parts lookup.