Motorad 4046-90 Engine Coolant Thermostat

Heavy Duty Cooling Control

The Motorad Heavy Duty Thermostat 4046-90 is an engine coolant thermostat built for precise temperature control in demanding cooling systems. It uses OEM-quality materials and OE-supplier manufacturing standards to deliver consistent coolant flow management.

• 190 degree opening temperature for controlled engine warm-up.
• Copper case and wax compound for fast response to coolant temperature changes.
• Brass, stainless steel, and copper construction.
• Manufactured with OEM specifications and processes.
• Silver finish with a 2.46 in flange diameter and 3.00 in height.

Product Details

This Motorad thermostat is engineered as a direct cooling-system control component for applications that require a 190 Deg. F operating point. The 4046-90 part number identifies the thermostat used in a range of cooling system service applications, and the same part number is also referenced by 414-090, 9404690, and Stant 14559 for the same application. For buyers searching for a Motorad thermostat 4046-90 for cooling system repair, this unit provides a straightforward replacement path with OEM-style construction.

Common Issues It Can Address

• Engine running too cool and taking too long to reach operating temperature.
• Temperature fluctuations caused by a thermostat that opens inconsistently.
• Cooling system control problems tied to worn internal thermostat components.
• Reduced temperature response in demanding driving conditions.

Installation Notes

Verify the thermostat opening temperature, flange diameter, and housing dimensions before installation. This part does not include bolts, gasket or seal, hardware, or an installation tool. Confirm the cooling system specification and replace any related sealing components as required by the application.

Quality Assurance

Motorad manufactures this thermostat with OEM quality materials and safety standards as an OE supplier, using OEM specifications and processes for consistent cooling-system performance.