Gates 33947 Engine Coolant Thermostat - Rear

Reliable Engine Cooling with Gates OE Type Thermostat 33947

The Gates OE Type Thermostat 33947 is engineered to maintain optimal engine temperature for Chevrolet and GMC heavy-duty trucks and vans. Designed with durable steel and brass materials, this thermostat ensures consistent performance in demanding conditions.

• Material: Steel and brass construction for durability
• Design: Offset reverse poppet for precise temperature control
• Sealing flange outside diameter: 2.13 inches
• Height between flanges: 1 inch
• Overall height: 1.71 inches
• Seal type: O-ring for secure sealing
• Includes two jiggle pins/weep holes for air bleeding
• Start to open temperature: 180°F (82°C)
• OE performance rating for reliable fit and function

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 compatibility and performance consistency for Chevrolet Express, GMC Savana, and Silverado models requiring precise engine temperature regulation.

Detailed Product Description

The Gates 33947 thermostat features an offset reverse poppet design that allows for accurate temperature control, opening at 180°F (82°C) to regulate coolant flow effectively. Constructed from steel and brass, it offers resistance to corrosion and wear, extending service life. The O-ring seal type ensures a tight fit within the housing, preventing leaks. Two jiggle pins facilitate air bleeding during installation, reducing the risk of overheating caused by trapped air pockets. With a sealing flange diameter of 2.13 inches and a height of 1.71 inches, this thermostat fits specific Chevrolet and GMC heavy-duty models precisely.

Compatible Vehicles and Common Applications

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

This thermostat is ideal for addressing issues such as engine overheating, inconsistent temperature regulation, coolant leaks around the thermostat housing, and poor heater performance.

Installation Notes and Tips

• Installation tool is not included; use appropriate tools for removal and installation
• Ensure the O-ring seal is properly seated to prevent leaks
• Bleed the cooling system to remove air pockets using the jiggle pins
• Verify the thermostat opens at the specified temperature during testing

Quality Assurance and Warranty

The Gates OE Type Thermostat 33947 meets OE performance standards, ensuring reliable operation in Chevrolet and GMC heavy-duty vehicles. Manufactured with high-quality materials and precision engineering, this thermostat supports consistent engine temperature control. Warranty details should be confirmed with the product documentation or supplier.