Gates 33737S Engine Coolant Thermostat

Reliable Engine Cooling with Gates Premium Thermostat 33737S

The Gates Premium Thermostat 33737S is engineered to maintain optimal engine temperature for select Infiniti, Mercury, and Nissan vehicles. Designed with durable stainless steel and copper materials, this engine coolant thermostat ensures consistent performance and longevity.

• Constructed from stainless steel and copper for durability
• Reverse poppet design for precise temperature regulation
• Start to open temperature at 170°F (77°C) for efficient cooling
• Includes a jiggle pin weep hole to prevent air lock
• Sealing flange outside diameter of 2.52 inches for secure fit
• Compatible with multiple Infiniti, Mercury, and Nissan models

Detailed Features and Specifications

The Gates Premium Thermostat 33737S features a reverse poppet design that allows for accurate and reliable temperature control, opening at 170°F (77°C) to regulate coolant flow effectively. Its stainless steel and copper construction provides resistance to corrosion and wear, extending the thermostat's service life. The thermostat measures 2.61 inches in height with a 2.52-inch sealing flange outside diameter, ensuring a precise fit within the cooling system. Additionally, the inclusion of a jiggle pin weep hole helps eliminate air pockets, promoting smooth coolant circulation and preventing overheating.

Compatible Vehicles and Applications

This engine coolant thermostat is compatible with a range of Infiniti, Mercury, and Nissan vehicles, including models such as the Infiniti QX4, Nissan 300ZX, Pathfinder, Maxima, and Frontier, as well as the Mercury Villager and Nissan Pickup. The part number 33737S is specifically designed to meet the cooling system requirements of these vehicles, providing reliable temperature management for both daily driving and demanding conditions.

Common Issues Addressed by the Gates Premium Thermostat

• Engine overheating due to thermostat failure
• Poor engine warm-up performance
• Coolant leaks caused by damaged or worn thermostats
• Inconsistent engine temperature regulation
• Air lock in the cooling system affecting coolant flow

Installation Notes and Tips

The Gates Premium Thermostat 33737S does not include an installation tool, so it is recommended to use appropriate tools for removal and installation. Ensure the cooling system is properly drained before replacing the thermostat. Verify the sealing flange and gasket surfaces are clean and free of debris to prevent leaks. After installation, bleed the cooling system to remove any trapped air, taking advantage of the jiggle pin weep hole feature to facilitate this process.

Quality Assurance and Product Line Information

The Gates Premium Thermostat line is designed to provide reliable and consistent engine temperature control using high-quality materials and precise engineering. This product line focuses on durability and performance, making it suitable for a variety of vehicle applications. While no specific warranty information is provided, Gates is known for manufacturing components that meet or exceed OEM standards, ensuring dependable operation within the cooling system.