Motorad 635-180 Engine Coolant Thermostat

Engine Cooling Control for Hyundai and Kia

Motorad Standard 635-180 is an engine coolant thermostat built for OE-style temperature control in a wide range of Hyundai and Kia applications. It opens at 180°F and includes the seal needed for a proper coolant-system service on many listed vehicles, including Hyundai Santa Fe, Kia Sorento, and Kia Sedona.

The Motorad Standard line focuses on OE supplier construction and OEM specifications, giving this thermostat the fit and operating characteristics expected in factory cooling systems. Part number 635-180 is a direct replacement choice for drivers servicing 180F thermostat applications across multiple Hyundai and Kia models.

Key Features

• 180°F start-to-open temperature for standard engine coolant regulation
• OE-supplier construction using OEM-quality materials and processes
• Copper case and wax compound for responsive temperature changes
• Offset design with air relief valve where applicable
• Jiggle pin weep hole for air bleeding during service
• O-ring seal included with rubber gasket/seal material
• Standard thermostat design for factory-style cooling system service
• Part number 635-180 for easy cross-reference and ordering

Product Details

This thermostat is designed for vehicles that require stable coolant temperature control under everyday driving and higher-load conditions. The copper case and wax element are used to react quickly to coolant temperature changes, helping the engine reach and maintain the intended operating range. Motorad 635-180 is listed for many Hyundai Genesis, Santa Fe, Azera, Veracruz, Sonata, Equus, Entourage, and Kia Sorento, Sedona, Borrego, Amanti, Cadenza, K900, and related applications.

This part cross-references Gates 34766 and Dorman - HELP 56358 for the same application.

What It Helps Address

• Engine running too cool or taking too long to warm up
• Temperature fluctuation caused by a worn thermostat
• Coolant flow control issues in 180°F thermostat applications
• Service replacement for leaking or aging thermostat seals
• Cooling-system maintenance on Hyundai and Kia vehicles

Installation Notes

• Verify the 180°F temperature specification before installation.
• Inspect the thermostat housing and sealing surfaces for corrosion or damage.
• Use the included O-ring seal and confirm proper seal seating.
• Bleed trapped air from the cooling system after installation.
• Confirm fitment by year, make, and model before service on Hyundai Santa Fe, Kia Sorento, or Kia Sedona applications.

Quality Assurance

Motorad Standard thermostats are manufactured to OEM specifications and safety standards by an OE supplier. The design uses OEM-style materials and processes to support consistent cooling-system operation in the listed Hyundai and Kia applications.