Motorad 823-203 Engine Coolant Thermostat Housing Assembly

Integrated Housing Thermostat for OE Fitment

Motorad 823-203 is an integrated housing thermostat assembly built for cooling systems that need precise temperature control and a direct OE-style replacement. It uses OEM-quality materials and an OE supplier manufacturing process to support consistent coolant regulation in demanding service conditions.

This Integrated Housing Thermostat line combines the thermostat and housing in one service part for a cleaner replacement on select Jeep and Dodge applications. Fits 2018 Jeep Wrangler JK, N/A; Fits 2012-2017 Jeep Wrangler, N/A; Fits 2011-2015 Dodge Durango, N/A; Fits 2011-2015 Jeep Grand Cherokee, N/A.

Key Features

• Motorad part number 823-203
• Integrated engine coolant thermostat housing assembly
• 203°F opening temperature / start-to-open temperature
• Bleeder hole and jiggle pin included for air management
• Rubber gasket/seal included
• Black housing with plastic, stainless steel, and copper construction
• 2 bolt holes and 1 outlet port
• 1.56 in outlet diameter
• Offset design with OEM-style seals where applicable

Detailed Description

Motorad 823-203 is engineered as an OE-style thermostat housing assembly for vehicles that require a 203°F coolant control point. The copper case and wax compound are used to respond quickly to coolant temperature changes, while the integrated housing format helps simplify replacement of the thermostat and housing together. This part cross-references Dorman OE Solutions 902-852 for the same application.

Compatible With select Jeep Wrangler, Jeep Wrangler JK, Jeep Grand Cherokee, and Dodge Durango applications listed above, this thermostat housing assembly is built to match OEM specifications and processes. Motorad 823-203 is a direct-fit cooling system service part for drivers addressing thermostat housing wear, coolant temperature regulation concerns, or seal-related leaks on the confirmed applications.

Common Issues This Part Can Help Address

• Coolant temperature running outside the specified 203°F range
• Thermostat housing leaks at the seal or mating surface
• Air trapped in the cooling system after service
• Delayed thermostat response during warm-up
• Cracked or worn integrated housing components

Installation Notes and Tips

• Verify the engine application and 203°F temperature specification before installation.
• Inspect the mating surface and cooling passages for residue or damage before fitting the new assembly.
• Use the included rubber seal and confirm proper seating of the bleeder hole and jiggle pin orientation.
• Refill and bleed the cooling system according to the vehicle service procedure to remove trapped air.
• Confirm there are no coolant leaks and that operating temperature stabilizes after installation.

Quality Assurance

Manufactured by an OE supplier using OEM-quality materials and processes, this thermostat housing assembly is built to meet the demands of modern automotive cooling systems. Motorad 823-203 is produced to OEM specifications for the listed Jeep and Dodge applications.