Motorad 523-174 Engine Coolant Thermostat

Motorad 523-174 Engine Coolant Thermostat

Motorad 523-174 is a 174 degree engine coolant thermostat built for GM cooling systems that demand stable temperature control. It uses OEM-quality materials and OE-supplier manufacturing processes to deliver consistent coolant flow response in applications such as Chevrolet Silverado, GMC Sierra, and Chevrolet Corvette.

Key Features

• 174 degree opening temperature for factory-style thermal control
• Copper case and wax compound for quick reaction to coolant temperature changes
• Stainless steel and copper construction
• Offset design with air relief valve where applicable
• Jiggle pin and jiggle pin weep hole included
• Gasket or seal included
• Silver finish
• Part number 523-174

Product Details

This Motorad Standard thermostat is engineered to OE specifications for direct replacement service in a wide range of GM trucks, vans, SUVs, and performance cars. The 174 degree calibration helps maintain the cooling system’s operating range, while the copper wax element responds quickly to temperature changes in the coolant. Motorad 523-174 is a practical choice for Chevrolet Silverado 1500, GMC Sierra 2500 HD, and Cadillac Escalade applications where accurate thermostat operation matters.

This part cross-references 52374 and NI for the same application.

What It Helps Address

• Engine running cooler or warmer than expected due to thermostat wear
• Delayed coolant circulation after cold start
• Temperature fluctuation from a sticking thermostat
• Cooling system service on GM trucks, vans, and SUVs
• Replacement of a thermostat with degraded seal or valve response

Installation Notes and Tips

Verify the flange diameter, height, and 174 degree temperature rating before installation. Replace the thermostat with the included seal, clean the housing mating surfaces, and confirm the jiggle pin orientation during assembly. This thermostat is listed for standard-position applications across many Chevrolet and GMC platforms, including Silverado, Sierra, Express, Savana, Tahoe, and Yukon models.

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and safety standards as an OE supplier. It is produced to OEM specifications and processes for dependable fit and thermal response in demanding automotive cooling systems.