Motorad 448-180 Engine Coolant Thermostat - Rear

Motorad 448-180 Engine Coolant Thermostat

The Motorad 448-180 is a standard engine coolant thermostat built for OE-style cooling system control in heavy-duty GM applications. It uses OEM-quality materials, a copper case, and a wax compound for quick response to coolant temperature changes, helping maintain stable operating temperature in demanding service.

Key Features

• 180°F start-to-open temperature for OE-specified thermal control
• Copper case and wax compound for responsive temperature regulation
• Offset design with air relief valve where applicable
• OEM-style seals included
• Jiggle pin weep hole and O-ring seal type
• Standard thermostat design for rear-position applications
• Sealing flange outside diameter: 2.2 in; height: 1.45 in

Detailed Description

Motorad Standard 448-180 is an engine coolant thermostat engineered to match OEM specifications and manufacturing processes. The 180-degree opening temperature supports factory-style coolant flow control, while the copper case and wax element are selected for consistent reaction to temperature changes. This thermostat is used in rear-position cooling system applications on Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, GMC Sierra 3500 HD, Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, GMC Savana 3500, and related heavy-duty GM platforms. This part cross-references MAHLE 54880 for the same application.

What It Is Used For

• Engine temperature running too cool or too warm
• Delayed coolant circulation after cold start
• Temperature fluctuation under load or towing
• Cooling system service on GM HD trucks and vans
• Replacement of a worn thermostat and seal assembly

Installation Notes and Tips

Verify the rear thermostat location and confirm the 180°F specification before installation. Inspect the sealing surfaces, replace damaged coolant, and ensure the O-ring seal seats evenly. The jiggle pin weep hole should be oriented to allow trapped air to escape during filling and bleeding. Confirm fitment for the exact vehicle configuration, especially on 2001-2024 Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications.

Quality Assurance

Manufactured by an OE supplier using OEM-quality materials and safety standards, this thermostat is built to meet the demands of factory cooling systems. It is produced to OEM specifications and processes for consistent fit and thermal performance.