Gates 33857 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for Subaru Vehicles

The Gates OE Type Thermostat 33857 is engineered to maintain optimal engine temperature for Subaru models including Baja, Forester, Impreza, Legacy, Outback, WRX, and WRX STI. Designed with durable steel and copper materials, this thermostat ensures consistent performance and longevity under demanding conditions.

• Constructed from steel and copper for durability and heat resistance
• Reverse poppet design for precise temperature regulation
• Start to open temperature at 170°F (77°C) for accurate coolant flow control
• Sealing flange outside diameter of 2.2 inches for secure fitment
• Height between flanges measures 0.83 inches, total height 1.53 inches
• OE Type Thermostat line ensures original equipment performance standards
• Compatible with multiple Subaru models: Baja, Forester, Impreza, Legacy, Outback, WRX, WRX STI

About the Gates OE Type Thermostat Product Line

The OE Type Thermostat line by Gates is designed to meet or exceed original equipment specifications, providing reliable engine temperature control. This product line focuses on delivering thermostats that match the exact fit, form, and function of factory-installed components. The 33857 thermostat exemplifies this approach with its reverse poppet design and precise opening temperature, ensuring efficient engine cooling and performance for Subaru vehicles.

Product Details and Specifications

The Gates 33857 thermostat features a reverse poppet design that allows for accurate and responsive coolant flow regulation. Made from steel and copper, it offers resistance to corrosion and thermal stress. The thermostat starts to open at 170°F (77°C), which is critical for maintaining optimal engine operating temperature. Its sealing flange outside diameter of 2.2 inches and height between flanges of 0.83 inches ensure a proper seal and fit within the cooling system. This thermostat does not include gaskets or installation tools, so ensure compatibility and proper installation procedures are followed.

Common Applications and Problem Resolution

• Prevents engine overheating by regulating coolant flow
• Helps avoid poor fuel economy caused by incorrect engine temperature
• Reduces risk of engine damage due to thermal stress
• Addresses issues with inconsistent cabin heating performance
• Replaces faulty or stuck thermostats in Subaru Baja, Forester, Impreza, Legacy, Outback, WRX, and WRX STI models

Installation Notes and Tips

Installation of the Gates OE Type Thermostat 33857 requires careful handling to avoid damage to the steel and copper components. Note that this thermostat does not include an installation tool or gaskets, so use OEM or compatible gaskets and appropriate tools for secure mounting. Verify the sealing flange dimensions and height measurements to ensure proper fitment. Follow vehicle-specific service manual instructions for thermostat replacement to maintain cooling system integrity.

Quality Assurance and Warranty

The Gates OE Type Thermostat 33857 is manufactured to meet OE performance standards, ensuring reliable operation within Subaru cooling systems. While specific warranty details are not provided here, Gates products typically come with manufacturer-backed quality assurance. For warranty information, refer to Gates’ official documentation or contact authorized distributors.