Calorstat TH6583.82 Engine Coolant Thermostat

Engine Coolant Thermostat for Toyota and Lexus V8 Applications

Calorstat TH6583.82 is a standard engine coolant thermostat built for precise coolant flow control in select Toyota, Lexus, and Mitsubishi applications. With an 180°F opening temperature, it supports stable operating temperature for vehicles such as the Toyota 4Runner, Toyota Land Cruiser, Lexus LS430, and Mitsubishi Montero.

Key Features

• Standard engine coolant thermostat for cooling system service
• Start to open temperature: 180.0°F / 82°C
• Sealing flange outside diameter: 2.51 in.
• Height between flanges: 1.61 in.
• Gasket or seal included: No
• Calorstat TH6583.82 cross-references OE-style applications for Toyota, Lexus, and Mitsubishi cooling systems

Detailed Product Overview

The Calorstat TH6583.82 thermostat is specified for vehicles that require an 82°C opening point to regulate coolant circulation through the engine and radiator. This part number appears in OE-recommended and OE-supplier applications across Toyota 4Runner, Toyota Tundra, Toyota Sequoia, Toyota Land Cruiser, Lexus GS430, Lexus GX470, Lexus LS430, Lexus LX470, Lexus SC430, and Mitsubishi Montero platforms. The compact flange dimensions help match the original housing interface, while the standard design supports direct cooling system replacement service.

What This Thermostat Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant circulation after cold start
• Temperature fluctuation during stop-and-go driving
• Cooling system service on Toyota 4Runner, Toyota Land Cruiser, and Lexus LS430 applications
• Replacement of a thermostat that no longer opens at the specified 180°F setting

Installation Notes and Tips

Verify housing condition, coolant quality, and mating surfaces before installation. Because no gasket or seal is included, reuse only if the existing seal is serviceable or install the correct separate sealing component for the application. Confirm the thermostat orientation and opening temperature match the vehicle specification before refilling and bleeding the cooling system. Fits 2006 Toyota 4Runner, N/A; Fits 2004 Toyota 4Runner, N/A; Fits 2006 Toyota Land Cruiser, N/A; Fits 2006 Toyota Sequoia, N/A; Fits 2005-2006 Toyota Tundra, N/A; Fits 2001-2005 Lexus GS430, N/A; Fits 2003-2005 Lexus GX470, N/A; Fits 2001-2005 Lexus LS430, N/A; Fits 1998-2005 Lexus LX470, N/A; Fits 2002-2005 Lexus SC430, N/A; Fits 2003-2006 Mitsubishi Montero, N/A; Fits 1995 Mitsubishi Montero, N/A.

Quality Assurance

Calorstat is listed as an OE supplier to Toyota on select applications, and this thermostat is referenced for OEM-recommended fitment in multiple Lexus and Toyota models. Part number TH6583.82 is also associated with common cross-reference numbers used in the aftermarket for the same application, including Motorad 301-180 and Carlson 14168.