Gates 33518 Engine Coolant Thermostat

Reliable Engine Cooling with Gates OE Type Thermostat 33518

The Gates OE Type Thermostat 33518 is engineered to maintain optimal engine temperature for a range of European and American vehicles. Designed with durable stainless steel and copper materials, this engine coolant thermostat ensures precise temperature regulation and reliable performance in models like Audi 80 Quattro, BMW 318i, and Mercedes-Benz 300D.

• Constructed from stainless steel and copper for durability and corrosion resistance
• Bottom by-pass design for efficient coolant flow
• Start to open temperature between 176°F and 180°F for accurate engine temperature control
• Sealing flange outside diameter approximately 2.63 to 2.64 inches for secure fitment
• Compatible with multiple makes including Audi, BMW, Jaguar, Jeep, Lincoln, Mercedes-Benz, Volkswagen, and Volvo

About the Gates OE Type Thermostat Product Line

The OE Type Thermostat line by Gates is designed to meet original equipment specifications, providing a direct replacement for factory-installed thermostats. This ensures consistent engine temperature management and compatibility with the vehicle’s cooling system. The 33518 thermostat features a bottom by-pass design and precise opening temperatures, aligning with the performance standards expected in OE components.

Detailed Product Description

The Gates 33518 thermostat is crafted from high-quality stainless steel and copper, materials chosen for their strength and resistance to corrosion in harsh engine environments. Its bottom by-pass design allows coolant to circulate efficiently even when the thermostat is closed, preventing localized overheating. The thermostat opens at a temperature range of 176°F to 180°F, which helps maintain optimal engine operating temperature and improves fuel efficiency. The sealing flange outside diameter of approximately 2.63 to 2.64 inches ensures a tight seal within the housing, minimizing leaks. This thermostat does not include gaskets or jiggle pins, simplifying installation and maintenance.

Compatible Vehicles and Applications

• Designed for use in Audi models such as 80, 80 Quattro, 90, and 90 Quattro
• Fits BMW vehicles including 318i, 318is, 320i, 325i, 535i, M3, and M5
• Compatible with Mercedes-Benz models like 300D, 300SD, 350SD, and 350SDL
• Suitable for Jeep Cherokee and Wagoneer
• Also fits Jaguar XJ6, XJR, XJRS, and Z3

Common Issues Addressed by This Thermostat

• Engine overheating due to thermostat failure
• Poor engine warm-up performance
• Inconsistent coolant flow causing temperature fluctuations
• Coolant leaks from worn or damaged thermostat seals
• Reduced fuel efficiency from improper engine temperature regulation

Installation Notes and Tips

The Gates 33518 thermostat is designed for direct replacement without the need for additional gaskets or installation tools. Ensure the sealing flange is clean and free of debris before installation to achieve a proper seal. Verify the thermostat orientation matches the bottom by-pass design for correct coolant flow. It is recommended to inspect the housing and coolant passages for corrosion or blockages during installation.

Quality Assurance and Warranty

Gates OE Type Thermostats are manufactured to meet or exceed original equipment standards, ensuring reliable performance and durability. While specific warranty details for part number 33518 may vary, Gates typically offers coverage against defects in materials and workmanship. Refer to the product packaging or manufacturer documentation for exact warranty terms.