Motorad 226-180 Engine Coolant Thermostat

Motorad 226-180 Engine Coolant Thermostat

Motorad 226-180 is a standard engine coolant thermostat built for precise temperature control in demanding cooling systems. It opens at 180°F and uses OEM-spec materials and processes to support consistent coolant flow in applications such as Cadillac DeVille, Eldorado, Seville, Fleetwood, and Commercial Chassis models.

Key Features

• 180°F start-to-open temperature for regulated engine warm-up and coolant circulation
• Copper case and wax compound for responsive reaction to coolant temperature changes
• Offset design with OEM-style seals where applicable
• Built to OEM quality materials and safety standards by an OE supplier
• Standard type thermostat for direct replacement service
• Part number 226-180 for catalog and fitment lookup

Product Details

This Motorad Standard thermostat is engineered for vehicles that need stable coolant control under everyday driving and higher-load operation. The copper case helps the thermostat react quickly as coolant temperature rises, while the wax compound supports repeatable opening behavior. Motorad 226-180 is a practical OE-style replacement for a wide range of Cadillac cooling system applications, including 1968-1984 Cadillac Commercial Chassis, 1968-1984 Cadillac Fleetwood, 1968-1981 Cadillac DeVille, 1968-1978 Cadillac Eldorado, 1980-1981 Cadillac Eldorado, and 1980-1981 Cadillac Seville.

This part cross-references Gates 22680 and Carlson 15458 for the same application.

Common Problems This Part Can Address

• Engine running too cool because the thermostat is stuck open
• Overheating caused by a thermostat that does not open at the correct temperature
• Slow warm-up and poor heater performance during cold starts
• Temperature fluctuation from inconsistent coolant flow control
• Cooling system service on Cadillac DeVille, Eldorado, Seville, Fleetwood, or Commercial Chassis models

Installation Notes and Tips

Verify the thermostat housing dimensions before installation, including the 2.12 in sealing flange outside diameter, 1.24 in height between flanges, 1.77 in overall height, and 0.06 in flange thickness. This thermostat does not include a gasket or seal, and it does not include an installation tool. Clean the housing mating surfaces thoroughly and confirm the bypass dimensions match the application before assembly.

Quality Assurance

Motorad manufactures this thermostat to OEM specifications and processes using OEM-quality materials. As an OE supplier, Motorad builds the 226-180 to meet the demands of automotive cooling systems while maintaining the temperature control expected in factory-style service parts.