Motorad 5268-170 Engine Coolant Thermostat

Motorad UltraStat 170F Thermostat

Motorad UltraStat part number 5268-170 is an engine coolant thermostat built for direct-fit cooling system service on select Nissan and INFINITI applications. It uses heavy-gauge stainless steel construction for corrosion resistance and long-term durability, with BLVT valve technology to help reduce thermal shock in the cooling system.

Compatible With 1984-2004 Nissan and INFINITI vehicles, including Frontier, Xterra, Pathfinder, Maxima, 300ZX, Quest, Q45, QX4, J30, M30, 200SX, Pickup, D21, and Villager applications where a 170 degree thermostat is specified.

Key Features

• 170 degree Fahrenheit thermostat calibration
• Heavy-gauge stainless steel construction for corrosion resistance
• BLVT valve technology to help moderate coolant flow changes
• Jiggle pin weep hole for air bleeding during service
• Sealing flange outside diameter: 2.52 in.
• Bypass diameter: 0.98 in.
• Bypass length: 1.88 in.
• Flange thickness: 0.05 in.
• No gasket or seal included

Product Details

The Motorad UltraStat line focuses on durable thermostat construction for cooling system service. This 5268-170 thermostat is built with stainless steel components and a 170F opening temperature to match OE-specified applications that call for this calibration. The jiggle pin weep hole helps purge trapped air during filling, while the valve design is intended to smooth coolant movement and reduce abrupt temperature changes across cooling system components. This part cross-references Stant 45947 and Monroe Shocks & Struts 172286 for the same application.

Common Cooling System Issues It Can Address

• Engine running cooler or warmer than the specified operating range
• Slow warm-up after cold starts
• Temperature fluctuation caused by a sticking thermostat
• Cooling system service on Nissan Frontier, Nissan Pathfinder, or INFINITI Q45 models with a 170F requirement
• Air pockets in the cooling system after thermostat replacement

Installation Notes

Use silicone sealant where the vehicle application calls for it, and verify the thermostat orientation before installation. Clean the housing mating surfaces thoroughly and confirm the bypass dimensions and flange size match the original part. Because no gasket or seal is included, reuse only if the service procedure and condition allow it, or source the correct sealing components separately.

Fits 1999-2004 Nissan Frontier, N/A; 2002-2004 Nissan Xterra, N/A; 1993-2002 Mercury Villager, N/A; 1993-2002 Nissan Quest, N/A; 1997-2001 INFINITI Q45, N/A; 2000-2001 Nissan Xterra, N/A; 2000 INFINITI QX4, N/A; 1987-2000 Nissan Pathfinder, N/A; 1997-1999 INFINITI QX4, N/A; 1993-1997 INFINITI J30, N/A; 1987-1996 Nissan 300ZX, N/A; 1995 Nissan Pickup, N/A; 1986-1994 Nissan D21, N/A; 1985-1994 Nissan Maxima, N/A; 1990-1992 INFINITI M30, N/A; 1987-1988 Nissan 200SX, N/A; 1984-1986 Nissan 300ZX, N/A.

Quality Assurance

Motorad UltraStat thermostats are built with stainless steel construction and corrosion-resistant materials for consistent cooling system service. Part number 5268-170 is intended for applications that specify a 170F thermostat and should be matched to the vehicle’s OE requirements before installation.