Motorad 821-190 Engine Coolant Thermostat

Engine Coolant Thermostat for Jaguar and Land Rover

Motorad 821-190 is a standard engine coolant thermostat built to OE specifications for precise temperature control in demanding cooling systems. It starts to open at 190 degrees F and includes the thermostat insert and seal for the listed applications.

Compatible with select Jaguar XF, XJ8, XJR, XK, XKR, S-Type, Super V8, and Vanden Plas models, as well as Land Rover LR3, Range Rover, and Range Rover Sport applications, this thermostat is a direct-fit cooling system service part for OE-specified 190F operation.

Key Features

• Motorad Standard line thermostat, part number 821-190
• 190 degree F start-to-open temperature for OE-specified cooling control
• OEM-quality materials and manufacturing processes
• Copper case and wax compound for quick response to coolant temperature changes
• Offset design with air relief valve where applicable
• Rubber O-ring seal included
• Sealing flange outside diameter: 1.59 in.

Detailed Description

The Motorad 821-190 engine coolant thermostat is engineered as an OE-style replacement for vehicles that require a 190F thermostat. Its copper case and wax compound are used to promote responsive opening behavior as coolant temperature rises, helping maintain stable engine operating temperature. The included rubber seal and OEM-style sealing approach support a proper fit in the specified housing applications. This part cross-references Genuine LR005765 for the same application.

Motorad’s Standard product line focuses on direct replacement cooling components built to OEM specifications, making this thermostat a practical choice for Jaguar and Land Rover cooling system service. The 821-190 is listed for 2003-2009 Jaguar S-Type, 2006-2009 Jaguar XJ8, 2006-2009 Jaguar XJR, 2006-2009 Jaguar Vanden Plas, 2007-2009 Jaguar XK, 2009 Jaguar XKR, 2009 Jaguar Super V8, 2009-2010 Jaguar XF, 2005-2009 Land Rover LR3, 2006-2009 Land Rover Range Rover, and 2006-2009 Land Rover Range Rover Sport.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant temperature regulation during warm-up
• Cooling system temperature instability under normal driving conditions
• Thermostat leakage at the sealing surface
• Service replacement for OE-specified 190F thermostat applications

Installation Notes and Tips

Install the thermostat with the included seal and verify the housing sealing surfaces are clean before assembly. Follow the vehicle service procedure for coolant draining, refill, and air bleeding to reduce trapped air in the cooling system. The offset design and air relief valve are included where applicable, so confirm the thermostat orientation matches the original part before tightening the housing.

Quality Assurance

Manufactured by an OE supplier using OEM-quality materials and safety standards, this thermostat is built to meet the specifications and processes expected for factory-style cooling system service. The 821-190 is designed for direct replacement use in the listed Jaguar and Land Rover applications.