Dorman 902-3040 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing for Jeep and Ram

This Dorman engine coolant thermostat housing assembly is a direct replacement for specified Jeep Wrangler, Jeep Grand Cherokee, Ram 1500, and Ram 1500 Classic applications. Built with a black plastic housing and integrated thermostat, it is engineered to match the fit and durability of the original housing on the listed vehicles.

Part number 902-3040 is designed for vehicles that use a thermostat housing assembly with an integrated cover, including 2022-2023 Jeep Wrangler and 2022-2023 Ram 1500 models. It also serves 2014-2021 Jeep Grand Cherokee and multiple Ram 1500 applications, making it a focused OE-style cooling system replacement.

Key Features

• Direct replacement engine coolant thermostat housing assembly
• Black plastic construction for stock-style fit and function
• Integrated thermostat included
• Thermostat opening temperature: 208 degrees
• One outlet port with two mounting holes
• Gasket type: gasket
• Designed to withstand extreme temperature changes
• Cross-reference: 68211186AA and Motorad 945-208

Detailed Description

Dorman 902-3040 is a replacement thermostat housing assembly built to match the original housing used on select Jeep and Ram vehicles. The housing measures 1.357 inches inside diameter and features a flange length of 2.356 inches, flange width of 2.354 inches, and flange thickness of 0.25 inch. It is a regular-grade replacement part with a black finish and plastic construction for a stock-style appearance and fit.

This thermostat housing assembly includes the thermostat and is set to open at 208 degrees. It is designed for cooling systems that require an integrated cover style housing, including Jeep Wrangler and Ram 1500 fitments across the listed model years. Part number 902-3040 is a practical choice when replacing a worn or cracked thermostat housing on a Jeep Grand Cherokee, Jeep Wrangler, Ram 1500, or Ram 1500 Classic.

What It Helps Address

• Coolant leaks from a cracked or warped thermostat housing
• Overheating caused by a failing thermostat housing assembly
• Cooling system service needs on Jeep Wrangler and Ram 1500 models
• Loss of proper thermostat control from a worn integrated housing
• Replacement of an OE-style housing with integrated thermostat

Installation Notes and Tips

Verify the vehicle’s engine coolant thermostat housing style, mounting hole layout, and outlet configuration before installation. This assembly does not include mounting hardware or a separate gasket/seal, so confirm the required sealing components for the application. Clean the mating surfaces thoroughly and inspect adjacent cooling system parts for wear before reassembly.

Compatible With 2022-2023 Jeep Wrangler, 2022-2023 Ram 1500, 2014-2021 Jeep Grand Cherokee, 2020-2021 Jeep Wrangler, 2020-2021 Ram 1500, 2014-2018 Ram 1500, and 2019 Ram 1500 Classic as listed.

Quality Assurance

Dorman designs this thermostat housing assembly to match the fit and durability of the original equipment housing on the specified vehicles. The construction is intended to handle repeated temperature cycling in everyday cooling system service.