Motorad 5231KT Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly for Nissan and Infiniti

The Motorad 5231KT engine coolant thermostat housing assembly is built for OE-style cooling system service on select Nissan and INFINITI applications. It combines a thermostat housing with a 170°F thermostat specification to support proper coolant flow and temperature control in demanding daily driving conditions.

Motorad Kit line products are built around application-specific cooling system service parts, giving you a direct-fit solution for thermostat housing replacement on Nissan Frontier, Xterra, Pathfinder, and related models.

Key Features

• Engine coolant thermostat housing assembly with OE-specified 170°F thermostat temperature
• Manufactured with OEM-quality materials and processes
• Copper case and wax compound for quick response to coolant temperature changes
• Offset design with air relief valve where applicable
• OEM-style seals included where applicable
• Silver finish with steel, stainless steel, and copper construction
• 3 bolt-hole housing design
• Gasket or seal not included; bolts not included

Detailed Description

Motorad 5231KT is an OE-style thermostat housing assembly engineered for select Nissan and INFINITI cooling systems. It is designed to maintain stable engine operating temperature by regulating coolant flow through a housing built to OEM specifications. The copper thermostat element is formulated for fast reaction to temperature changes, helping the cooling system respond consistently during warm-up and normal operation. This part cross-references 95231KT and NI for the same application.

Fits 1999-2004 Nissan Frontier, N/A; Fits 2000-2004 Nissan Xterra, N/A; Fits 1997-2000 INFINITI QX4, N/A; Fits 1987-2000 Nissan Pathfinder, N/A; Fits 1995 Nissan Pickup, N/A; Fits 1986-1994 Nissan D21, N/A; Fits 1990-1992 INFINITI M30, N/A; Fits 1984-1989 Nissan 300ZX, N/A; Fits 1987-1988 Nissan 200SX, N/A.

Common Cooling System Issues Addressed

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuations caused by a worn thermostat housing assembly
• Coolant flow control problems in aging Nissan and INFINITI cooling systems
• Housing corrosion or material fatigue from long-term heat cycling
• Fitment-related replacement needs on OE-specified 170°F applications

Installation Notes and Tips

Verify the engine application and thermostat temperature before installation. Inspect the mating surfaces, coolant passages, and hoses for wear or contamination, and replace any damaged seals or gaskets as needed since this assembly does not include a gasket or seal. Confirm bolt-hole alignment and follow the vehicle service manual for coolant refill and bleeding procedures, especially on systems with an air relief valve.

Quality Assurance

Motorad manufactures this thermostat housing assembly with OEM-quality materials and safety standards as an OE supplier. The part is produced to OEM specifications and processes for consistent fit and cooling-system performance across the listed Nissan and INFINITI applications.