Dorman 902-5144 Engine Coolant Thermostat Housing Assembly - Upper

Engine Coolant Thermostat Housing for Mercedes-Benz

Dorman 902-5144 is a replacement engine coolant thermostat housing assembly built for specified Mercedes-Benz applications. It uses a metal housing with a natural finish and includes the thermostat and gasket to match the original layout on covered vehicles.

Designed for Mercedes-Benz E500, E420, S420, S500, SL500, CL500, and SL60 AMG applications, this thermostat housing assembly is made to handle repeated temperature swings in the cooling system. The Dorman 902-5144 part number is a direct reference for buyers searching for an OE-style thermostat housing assembly with integrated cover.

Key Features

• Metal thermostat housing assembly with natural finish
• Includes thermostat and gasket for the specified application
• 176 degree F thermostat opening temperature
• Three mounting holes and one outlet port
• Flange dimensions: 3.25 in. length, 3.5 in. width, 0.3 in. thickness
• Inside diameter: 1.1 in.
• Cross-references Gates 33933 and Stant 14598 for the same application

Detailed Description

This Dorman thermostat housing assembly is engineered to match the fit and durability of the stock housing on select Mercedes-Benz cooling systems. It is a practical replacement for upper-position and integrated-cover applications, including 1992-1993 Mercedes-Benz 400E, 400SE, 400SEL, and 500SEL, as well as later E500, E420, S420, S500, SL500, CL500, and SL60 AMG coverage. The Dorman 902-5144 helps restore proper coolant routing and thermostat control in vehicles that require a 176 degree F thermostat.

What It Helps Address

• Coolant leaks at the thermostat housing
• Cracked or warped housing surfaces
• Improper thermostat operation from worn components
• Cooling system temperature control concerns
• Replacement needs after corrosion or heat cycling

Installation Notes and Tips

Verify the housing position and mounting pattern before installation, especially on Mercedes-Benz upper applications. This assembly uses a gasket-type seal and does not include mounting hardware. Clean the mating surfaces thoroughly and confirm the coolant hose connection size and outlet orientation match the original part before reassembly.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match stock fit and durability for the listed vehicles and to withstand extreme temperature changes for extended service life.