Motorad 431-170 Engine Coolant Thermostat Housing Assembly

Integrated Housing Thermostat for Nissan and INFINITI

Motorad 431-170 is an integrated engine coolant thermostat housing assembly built for OE-style cooling system service. It combines the housing, thermostat, and gasket in one replacement part for direct service on select Nissan and INFINITI applications, including the Nissan Altima, Maxima, Murano, Quest, and INFINITI I35.

With a 170 Deg. F opening temperature, this Motorad integrated housing thermostat uses a copper case and wax compound for quick response to coolant temperature changes. The aluminum, stainless steel, and copper construction, along with the offset design, air relief valve, and included jiggle pin, supports proper coolant flow and air management in the cooling circuit.

Key Features

• Part number: 431-170
• Integrated housing thermostat assembly for cooling system service
• 170 Deg. F start-to-open temperature
• Includes housing, thermostat, and gasket
• Paper gasket/seal included
• Jiggle pin included for air bleeding
• 4 bolt holes and 2 outlet ports
• Silver finish with aluminum, stainless steel, and copper materials
• OE supplier manufacturing with OEM specifications and processes

Product Details

Motorad’s Integrated Housing Thermostat line focuses on OE-style replacement parts that match factory cooling system requirements. This 431-170 thermostat housing assembly is manufactured to OEM quality standards and uses materials selected for consistent temperature control and durability in demanding engine cooling environments. The 170 Deg. F calibration is suited to the listed Nissan and INFINITI applications where factory-style coolant regulation is required.

This part cross-references NGK 53170 for the same application. Motorad 431-170 is also referenced by aftermarket listings under 43170 and related OE-style numbers.

What It Helps Address

• Engine running hotter than normal due to thermostat control issues
• Coolant leaks at the thermostat housing or gasket surface
• Delayed coolant warm-up from a worn thermostat assembly
• Air trapped in the cooling system after service
• Temperature fluctuation caused by a failing housing or thermostat

Installation Notes

Compatible With 2002-2006 Nissan Altima, N/A; 2002-2008 Nissan Maxima, N/A; 2003-2007 Nissan Murano, N/A; 2008 Nissan Murano, N/A; 2004-2009 Nissan Quest, N/A; and 2002-2004 INFINITI I35, N/A. Fitment notes specify 170F temperature and include housing, thermostat, and gasket; the 2008 Murano application is listed to 07/2008.

Before installation, verify the engine cooling system is fully drained and the mating surfaces are clean and flat. Confirm the connector, hose routing, and outlet alignment match the original part, and follow the vehicle service procedure for coolant refill and air bleeding. The jiggle pin and air relief features should be oriented according to the factory installation position.

Quality Assurance

This thermostat housing assembly is manufactured by an OE supplier using OEM specifications and processes. The copper case and wax compound are selected to respond quickly to coolant temperature changes, and the part is built to meet the safety and material expectations associated with factory-style cooling system service.