Stant 14738 Engine Coolant Thermostat - Rear

Reliable Engine Coolant Thermostat for Chevrolet and GMC Vehicles

The Stant OE Type Thermostat 14738 is engineered to maintain optimal engine temperature for select Chevrolet, GMC, and Hummer models. Designed with precise flange dimensions and a 180-degree Fahrenheit opening temperature, this thermostat ensures efficient coolant flow and engine performance.

• Flange diameter with and without seal: 2.2 inches
• Height from flange to bottom: 1.15 inches
• Height from flange to top of bridge: 0.6 inches
• Temperature rating: 180 degrees Fahrenheit
• Freight class: 70

About the Stant OE Type Thermostat Product Line

The OE Type Thermostat line by Stant is designed to meet original equipment specifications, providing reliable temperature regulation and compatibility with factory cooling systems. This product line focuses on precise fitment and consistent performance, making it suitable for professional repairs and maintenance on vehicles like the Chevrolet Silverado 2500 HD and GMC Sierra 3500.

Detailed Product Description

The Stant 14738 engine coolant thermostat features a flange diameter of 2.2 inches, both with and without the seal, ensuring a secure and leak-free installation. Its compact height dimensions—1.15 inches from flange to bottom and 0.6 inches from flange to top of bridge—allow it to fit seamlessly within the thermostat housing. The thermostat opens at 180 degrees Fahrenheit, a temperature calibrated to optimize engine operating conditions and prevent overheating or overcooling. This part is compatible with a range of Chevrolet, GMC, and Hummer models, including Express 2500, Express 3500, H1, Savana 2500, Savana 3500, Sierra 2500 HD, Sierra 3500, Silverado 2500 HD, and Silverado 3500 Classic.

Common Applications and Issues Addressed

• Regulates engine temperature to prevent overheating
• Ensures proper coolant flow through the engine
• Replaces faulty or stuck thermostats causing poor engine performance
• Helps maintain fuel efficiency by stabilizing engine temperature
• Prevents engine damage due to improper coolant circulation

Installation Notes and Tips

When installing the Stant 14738 thermostat, ensure the flange diameter matches the housing for a proper seal. Use a new gasket or seal to prevent leaks. Verify the thermostat orientation aligns with the vehicle manufacturer’s specifications. It is recommended to drain the coolant system before removal and refill with fresh coolant after installation. Check for leaks and proper operation during initial engine warm-up.

Quality Assurance and Warranty

Stant OE Type Thermostats are manufactured to meet or exceed OEM standards, ensuring durability and reliable performance. While specific warranty details for part number 14738 should be confirmed with the supplier, Stant products typically come with a limited warranty covering defects in materials and workmanship.