Gates 33951 Engine Coolant Thermostat

Overview of Gates Integrated Housing Thermostat 33951

The Gates Integrated Housing Thermostat 33951 is engineered for reliable engine temperature regulation in select Nissan and INFINITI vehicles. Designed to maintain optimal coolant flow, this thermostat supports efficient engine performance and helps prevent overheating.

• Integrated housing thermostat design with jiggle pin weep hole
• Start to open temperature at 180°F (82°C) for precise thermal control
• Three bolt hole mounting for secure installation
• Outlet outside diameters of 1.45 inches and 0.56 inches
• Outlet inside diameters of 1.23 inches and 0.44 inches
• Compatible with Nissan Altima, I35, Maxima, Murano, Quest and INFINITI models

Detailed Product Description

The Gates Integrated Housing Thermostat 33951 combines the thermostat and housing into a single unit, simplifying installation and reducing potential leak points. Featuring a jiggle pin weep hole, this thermostat allows trapped air to escape, improving coolant circulation and engine warm-up times. The thermostat begins to open at 180°F (82°C), ensuring the engine reaches and maintains the correct operating temperature. With three bolt holes, the housing mounts securely to the engine, and the dual outlet diameters (1.45" and 0.56" outside, 1.23" and 0.44" inside) accommodate specific coolant hose connections for a precise fit.

This part is designed for use in various Nissan and INFINITI vehicles, including the Altima, I35, Maxima, Murano, and Quest models. The Gates Integrated Housing Thermostat line focuses on combining critical cooling components into a single assembly, improving reliability and ease of maintenance compared to separate thermostat and housing setups.

Common Applications and Issues Addressed

• Prevents engine overheating by regulating coolant flow
• Eliminates coolant leaks associated with separate thermostat housings
• Improves engine warm-up time through jiggle pin air release
• Maintains consistent engine operating temperature for optimal performance
• Replaces faulty or worn thermostats in Nissan and INFINITI cooling systems

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Verify the gasket surface is clean and free of debris before mounting
• Torque the three bolts evenly to manufacturer specifications to prevent leaks
• Check coolant levels and bleed air from the system after installation
• Use OEM or equivalent coolant to maintain system integrity

Quality Assurance and Warranty

The Gates Integrated Housing Thermostat 33951 meets OE performance standards, providing reliable operation consistent with original equipment. While this part is not an exact OE replacement, it is engineered to deliver comparable durability and function. Gates products are manufactured under strict quality controls to ensure long service life. Please refer to the product packaging or manufacturer documentation for specific warranty details.