Motorad 448-180 Engine Coolant Thermostat - Rear

Reliable Engine Coolant Thermostat for Chevrolet, GMC, and Hummer

The Motorad Standard 448-180 engine coolant thermostat is designed to maintain optimal engine temperature for select Chevrolet, GMC, and Hummer models. Engineered with precision, this thermostat ensures efficient coolant flow and temperature regulation at 180 degrees Fahrenheit.

• Sealing flange outside diameter: 2.2 inches
• Height between flanges: 1.02 inches
• Overall height: 1.45 inches
• Standard type thermostat with jiggle pin weep hole
• Includes rubber gasket with O-ring seal
• Start to open temperature: 180°F
• Flange thickness: 0.05 inches
• One seal included, no installation tool required

About the Motorad Standard Product Line

The Motorad Standard line offers dependable replacement parts designed to meet original equipment specifications. This engine coolant thermostat from the Standard series provides consistent performance and durability, making it suitable for routine maintenance and repairs on compatible vehicles.

Product Details and Specifications

The Motorad Standard 448-180 thermostat features a 2.2-inch sealing flange outside diameter and a 1.02-inch height between flanges, ensuring a precise fit within the cooling system. Its 1.45-inch overall height and 0.05-inch flange thickness contribute to proper installation and sealing. The thermostat opens at 180 degrees Fahrenheit, regulating coolant flow to maintain engine temperature. Equipped with a jiggle pin weep hole, it allows air to escape from the cooling system, preventing air locks. The included rubber gasket with an O-ring seal ensures a secure, leak-free connection.

Compatible Vehicles and Applications

• Chevrolet Express 2500 and 3500
• GMC Savana 2500 and 3500
• 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
• Hummer H1

This thermostat is designed specifically for these models to ensure proper engine temperature control and cooling system efficiency.

Common Issues Addressed by This Thermostat

• Engine overheating due to thermostat failure
• Coolant leaks caused by worn or damaged seals
• Poor engine performance from improper coolant flow
• Air trapped in the cooling system causing temperature fluctuations
• Delayed engine warm-up times

Installation Notes and Tips

Before installation, verify compatibility with your vehicle’s make and model. Ensure the cooling system is drained to prevent spills. Replace the old thermostat and gasket with the Motorad Standard 448-180 part number, making sure the jiggle pin is positioned correctly to allow air to escape. Tighten the flange bolts evenly to avoid leaks. No special installation tools are required, but follow manufacturer torque specifications for best results.

Quality Assurance and Warranty

Motorad Standard thermostats are manufactured to meet OEM standards for fit and function. This part includes a rubber gasket and O-ring seal to ensure a reliable, leak-free installation. While specific warranty details are not provided, Motorad products typically adhere to industry quality controls to support vehicle cooling system integrity.