Motorad CH3121 Engine Coolant Thermostat Housing - Lower

Motorad CH3121 Lower Thermostat Housing

Motorad CH3121 is an engine coolant thermostat housing built for lower cooling system applications with confirmed fitment for select Hyundai and Kia models. It uses a plastic housing with a black finish, includes a pre-installed rubber seal, and is validated for thermal shock and leak resistance.

Key Features

• Engine coolant thermostat housing for lower position applications
• Plastic construction with black finish
• Gasket or seal pre-installed for a cleaner replacement process
• Rubber sealing material for coolant sealing at the housing interface
• Thermal shock validated and 100% leak tested
• OE supplier manufacturing standard for consistent fit and function
• Motorad CH3121 cross-references Gates CO35012 and Hyundai/Kia 25620-2GTA0

Detailed Description

This Motorad CH3121 thermostat housing is engineered as a lower engine coolant housing for cooling system service on 2015-2020 Hyundai Sonata, 2019-2020 Hyundai Santa Fe, 2017-2018 Hyundai Santa Fe Sport, 2016-2020 Kia Optima, 2016-2018 Kia Sorento, and 2017 Kia Sportage. The housing is made from plastic and finished in black, with a rubber seal already installed to help simplify replacement and restore a secure coolant connection. Motorad CH3121 is manufactured to OEM quality standards by an OE supplier and tested for thermal shock and leakage performance.

Common Uses

• Replacing a cracked or warped thermostat housing
• Restoring coolant sealing at the lower housing connection
• Addressing coolant leaks from the thermostat housing area
• Repairing heat-related housing damage from repeated temperature cycling
• Replacing a worn housing on Hyundai Sonata, Hyundai Santa Fe, Kia Optima, Kia Sorento, or Kia Sportage applications

Installation Notes

Verify the lower-position housing match before installation and compare port layout, bolt-hole spacing, and inlet/outlet dimensions to the original part. Inspect the mating surfaces and cooling system components before assembly, and replace contaminated coolant as needed. Confirm fitment for the exact vehicle year, make, and model before service.

Quality Assurance

Motorad manufactures this housing to OEM quality standards as an OE supplier. It is thermal shock validated and 100% leak tested for cooling system reliability.