Motorad 439-180 Engine Coolant Thermostat Housing Assembly

Integrated Housing Thermostat for Land Rover Cooling Systems

Motorad 439-180 is an engine coolant thermostat housing assembly built for Land Rover cooling system service. It combines the thermostat and housing in an integrated design with OEM-style seals where applicable, helping maintain proper coolant flow and temperature control in demanding operating conditions.

Compatible With 1999-2004 Land Rover Discovery and 2011-2016 Land Rover Defender applications, this Motorad Integrated Housing Thermostat is specified at 180 degrees F for OE-style temperature control. The Motorad 439-180 uses OEM-quality materials and manufacturing processes to match the original cooling system layout.

Key Features

• Engine coolant thermostat housing assembly with integrated housing design
• 180 degrees F opening and start-to-open temperature
• Three bolt holes and three outlet ports
• Plastic, stainless steel, and copper construction
• Offset design with air relief valve included where applicable
• OE-style seals included where applicable
• White housing finish
• Cross-reference part numbers include Dorman - OE Solutions 902-5163 and Continental 49480

Detailed Description

Motorad’s Integrated Housing Thermostat line is built for OE-style cooling system service, using OEM specifications and processes to support consistent temperature regulation. The copper case and wax compound are engineered for quick response to coolant temperature changes, while the integrated housing format helps simplify replacement on vehicles that use a combined thermostat and housing assembly. This Motorad 439-180 thermostat housing assembly is a direct-fit style solution for Land Rover Discovery and Land Rover Defender cooling system maintenance.

What It Helps Address

• Engine running too cool or too hot due to thermostat control issues
• Coolant temperature instability during stop-and-go or highway driving
• Leaks at the thermostat housing interface on serviceable applications
• Delayed warm-up caused by a worn thermostat element
• Cooling system service on Land Rover Discovery and Land Rover Defender models

Installation Notes and Tips

Verify outlet diameter, bolt-hole count, and temperature specification before installation. This assembly does not list a bleeder hole, jiggle pin, bolts, gasket or seal, hardware, or installation tool as included, so reuse or source the required service parts as needed for the vehicle. Clean the mating surfaces thoroughly and follow the vehicle service procedure for coolant refill and air bleeding.

Quality Assurance

Motorad manufactures this part with OEM-quality materials and safety standards as an OE supplier. The 439-180 is produced to OEM specifications for fit and temperature control in demanding automotive cooling systems.