Gates 33747S Engine Coolant Thermostat

Gates Premium Thermostat for Nissan Cooling Systems

The Gates Premium Thermostat 33747S is an engine coolant thermostat built for Nissan and INFINITI applications that call for a 170-degree opening temperature. It uses stainless steel and copper construction for corrosion resistance, along with an upgraded spring for steadier temperature control during normal operation.

Compatible With Nissan Frontier, Nissan Pickup, Nissan Xterra, Nissan Altima, Nissan Sentra, Nissan 200SX, Nissan 240SX, Nissan D21, Nissan NX, and INFINITI G20 applications listed below.

• Premium thermostat design with bottom by-pass configuration
• Heavy-gauge stainless steel and copper construction
• 170-degree start-to-open temperature for OE-temperature applications
• Jiggle pin weep hole for air bleeding during service
• By-pass flange diameter: 1.09 in.
• Sealing flange outside diameter: 2.13 in.
• Height: 2.2 in.; height between flanges: 1.36 in.
• No gasket, seal, or installation tool included

Product Details

Gates Premium Thermostat 33747S is engineered for vehicles that need stable coolant regulation at OE temperature. The stainless steel and copper body helps resist corrosion in the cooling system, while the spring upgrade supports more consistent opening behavior under normal operating conditions. The bottom by-pass design and jiggle pin weep hole are important details for proper coolant flow and air management in the housing.

This part cross-references Four Seasons 65967 for the same application.

Common Cooling Issues It Can Address

• Engine running too cool or too warm due to thermostat wear
• Temperature fluctuation during stop-and-go driving
• Corrosion-related thermostat sticking in the housing
• Air trapped in the cooling system after service
• Incorrect coolant flow control in OE-temperature Nissan and INFINITI setups

Installation Notes and Fitment

Use silicone where the application notes specify that a gasket is not required. Confirm the bottom by-pass layout, flange dimensions, and 170-degree specification before installation. This thermostat fits 2006-2009 Nissan Pickup, 1994 Nissan Pickup, 2006-2008 Nissan Frontier, 2002-2004 Nissan Frontier, 1995-2005 Nissan Pickup, 1993 Nissan Pickup, 1991 Nissan Pickup, 2000-2004 Nissan Xterra, 1993-2001 Nissan Altima, 1998-2001 Nissan Frontier, 1998-2001 Nissan Sentra, 1991-1994 Nissan Sentra, 1995-1998 Nissan 200SX, 1993-1998 Nissan 240SX, 1991-1996 INFINITI G20, 1994 Nissan D21, 1990-1993 Nissan D21, 1991-1993 Nissan NX, 1989-1992 Nissan 240SX, and 1992 Nissan Pickup.

Quality Assurance

Gates Premium Thermostats are built with upgraded materials and spring design to support temperature stability and corrosion resistance in everyday cooling-system service. Part number 33747S is listed with multiple interchange references, including Motorad 2028-170, for application matching.