Gates 33738S Engine Coolant Thermostat

Reliable Cooling Control for INFINITI, Nissan, and Mercury Vehicles

The Gates Premium Thermostat 33738S is engineered to maintain optimal engine temperature for select INFINITI, Nissan, and Mercury models. Designed with durable stainless steel and copper materials, this engine coolant thermostat ensures consistent performance and longevity in your vehicle's cooling system.

Key Features of Gates Premium Thermostat 33738S

• Constructed from stainless steel and copper for corrosion resistance and durability
• Reverse poppet design for precise temperature regulation
• Start to open temperature at 180°F (82°C) for efficient engine warm-up
• Includes a jiggle pin weep hole to prevent air lock and improve coolant flow
• Sealing flange outside diameter of 2.51 inches and height between flanges of 1.93 inches
• Height from flange measures 0.7 inches, total height 2.63 inches
• Does not include gaskets or installation tool

About the Gates Premium Thermostat Product Line

The Premium Thermostat line by Gates focuses on delivering reliable temperature control components designed to meet or exceed OEM specifications. This product line emphasizes quality materials and precise engineering, such as the reverse poppet design found in part number 33738S, to ensure consistent engine performance and protection across various vehicle applications.

Detailed Product Description

The Gates 33738S thermostat is specifically designed for use in a range of INFINITI, Nissan, and Mercury vehicles including models like the 200SX, 300ZX, D21, Frontier, J30, M30, Maxima, Pathfinder, Pickup, Quest, QX4, Villager, and Xterra. Its reverse poppet design allows for accurate temperature control by opening at 180°F (82°C), which helps the engine reach optimal operating temperature efficiently. The stainless steel and copper construction provides resistance to corrosion and wear, extending the life of the thermostat. The inclusion of a jiggle pin weep hole helps prevent air pockets in the cooling system, promoting smooth coolant circulation and reducing the risk of overheating.

Common Applications and Issues Addressed

• Regulates engine temperature to prevent overheating
• Ensures proper coolant flow for efficient engine warm-up
• Prevents air lock in the cooling system with jiggle pin weep hole
• Replaces faulty or worn thermostats in compatible INFINITI, Nissan, and Mercury models
• Helps maintain engine performance and fuel efficiency by stabilizing temperature

Installation Notes and Tips

This thermostat does not include an installation tool or gaskets, so ensure you have the appropriate tools and replacement gaskets before beginning installation. Verify compatibility with your specific vehicle model and engine type. Proper sealing and torque specifications should be followed to avoid leaks. The jiggle pin weep hole should be oriented correctly to allow air to escape during installation.

Quality Assurance and Warranty

Gates Premium Thermostats are manufactured to meet stringent quality standards, using corrosion-resistant materials and precise engineering. While specific warranty details for part number 33738S are not provided here, Gates typically offers warranties covering defects in materials and workmanship. Consult the product packaging or manufacturer documentation for exact warranty terms.