Dorman 902-3115 Engine Coolant Thermostat Housing Assembly

Dorman 902-3115 Thermostat Housing Assembly

Dorman 902-3115 is an engine coolant thermostat housing assembly built for specified Ram applications. It combines the thermostat housing, thermostat, and gasket in one OE-style replacement package for Ram 1500 and Ram 1500 Classic cooling system service.

Made from black plastic with a 1.3-inch inside diameter, this housing is engineered to match stock fit and durability while handling repeated temperature swings in the cooling system. The integrated bleeder hole and included gasket help support proper coolant service and sealing.

Key Features

• Engine coolant thermostat housing assembly for Ram cooling system repair
• Black plastic housing with 2 mounting holes and 1 outlet port
• Includes thermostat and gasket for a complete service replacement
• Thermostat opening temperature: 194 degrees F
• Bleeder hole included for coolant bleeding during service
• Cross-references Motorad 953-194 and OE numbers 95394, 4893865AA

Detailed Description

This Dorman thermostat housing assembly, part number 902-3115, is designed for Ram 1500 and Ram 1500 Classic cooling system applications where the thermostat housing cover has worn, cracked, or begun leaking. It is built to match the original housing layout and uses a gasket seal for proper fit at the mounting flange. The housing is a direct replacement style component for 2014-2018 Ram 1500 and 2019-2024 Ram 1500 Classic models with the listed configuration.

Compatible With 2014-2018 Ram 1500, N/A and 2019-2021 Ram 1500 Classic, N/A, plus 2022-2024 Ram 1500 Classic, N/A. Dorman 902-3115 is a practical choice when servicing the thermostat housing on these Ram trucks and restoring normal coolant flow control.

Common Problems This Part Can Address

• Coolant seepage at the thermostat housing seal
• Cracked or heat-damaged plastic housing
• Faulty thermostat causing incorrect engine operating temperature
• Bleeding issues after cooling system service
• Loss of sealing at the integrated housing cover

Installation Notes and Tips

Drain the cooling system before removal, clean the mating surface thoroughly, and inspect the hose connection and mounting points for wear. Use the included gasket during installation and follow the vehicle service procedure for coolant refill and air bleeding. Verify the thermostat housing orientation and bleeder hole position before tightening fasteners.

Quality Assurance

Dorman engineers this replacement thermostat housing assembly to match the fit and durability of the original housing on specified vehicles. It is built to withstand extreme temperature changes for extended service life in Ram 1500 and Ram 1500 Classic cooling system applications.