Gates 33946 Engine Coolant Thermostat - Front

Reliable Engine Cooling with Gates OE Type Thermostat 33946

The Gates OE Type Thermostat 33946 is engineered to maintain optimal engine temperature for Chevrolet and GMC heavy-duty trucks and vans. Designed with durable steel and copper materials, this engine coolant thermostat ensures consistent performance and longevity in demanding conditions.

• Constructed from steel and copper for durability and heat resistance
• OE Type Thermostat design with bottom by-pass for efficient coolant flow
• Sealing flange outside diameter of 2.12 inches for precise fitment
• Start to open temperature at 185°F (85°C) for accurate temperature regulation
• O-ring seal type with one seal included for leak prevention
• Compatible with Chevrolet Express, GMC Savana, Sierra, and Silverado 2500/3500 HD models

About the Gates OE Type Thermostat Product Line

The OE Type Thermostat line by Gates is designed to meet original equipment specifications, providing reliable engine temperature control and compatibility with factory cooling systems. This product line focuses on delivering thermostats that match OE performance standards, ensuring proper fit and function for specific vehicle applications such as Chevrolet and GMC heavy-duty trucks and vans.

Detailed Product Description

The Gates 33946 thermostat features a bottom by-pass design that allows coolant to circulate even when the thermostat is closed, helping to prevent hot spots and improve engine warm-up times. With a height of 2.09 inches and a height between flanges of 1.41 inches, it fits precisely within the cooling system housing. The thermostat opens at 185°F (85°C), maintaining optimal engine temperature to prevent overheating or overcooling. The O-ring seal ensures a secure, leak-free installation without the need for additional gaskets. This thermostat does not include a jiggle pin or installation tool, reflecting its straightforward design and compatibility with standard installation procedures.

Compatible Vehicles and Common Applications

• Chevrolet Express 2500 and 3500
• GMC Savana 2500 and 3500
• Chevrolet and GMC Sierra 2500 HD, 2500 HD Classic, 3500, 3500 Classic, and 3500 HD
• Chevrolet Silverado 2500 HD, 2500 HD Classic, 3500, 3500 Classic, and 3500 HD

This thermostat is ideal for addressing issues such as:

• Engine overheating due to thermostat failure
• Inconsistent engine temperature regulation
• Coolant leaks caused by worn or damaged seals
• Extended engine warm-up times
• Reduced fuel efficiency linked to improper coolant flow

Installation Notes and Tips

Installation of the Gates 33946 thermostat requires no additional gaskets as it includes an O-ring seal. Ensure the cooling system is drained before removal of the old thermostat. Clean the housing surfaces thoroughly to prevent leaks. This thermostat does not come with an installation tool, so use appropriate hand tools and follow vehicle manufacturer torque specifications. Verify the thermostat orientation matches the original to maintain proper coolant flow.

Quality Assurance and Warranty

Gates OE Type Thermostats are manufactured to meet or exceed original equipment standards, providing reliable performance and durability. The 33946 thermostat carries an OE comparison rating, ensuring it matches factory specifications for Chevrolet and GMC heavy-duty trucks and vans. While specific warranty details are not provided here, Gates products typically include limited warranties covering defects in materials and workmanship.