Dorman 902-5847 Engine Coolant Thermostat Housing Assembly - Water Pump

Engine Coolant Thermostat Housing Assembly

Dorman 902-5847 is a replacement engine coolant thermostat housing assembly for select Mercedes-Benz applications. It is built with a black plastic housing and thermostat to match the original fit and help manage coolant flow in vehicles that see repeated temperature swings.

Compatible With Mercedes-Benz models including SL550, S500, S550, CLS550, GL550, ML500, and E500, this thermostat housing assembly is a direct-fit cooling system service part for the specified applications.

Key Features

• Plastic housing in black finish
• Thermostat included with 217 degrees F opening temperature
• Single outlet port design
• Three mounting holes for OE-style attachment points
• Standard gasket type with no gasket or seal included
• Inside diameter: 1.8 in.
• Flange dimensions: 3.65 in. length, 3.75 in. width, 0.35 in. thickness

Detailed Description

This Dorman thermostat housing assembly is engineered to match the fit and durability of the stock housing on specified Mercedes-Benz cooling systems. The housing is designed to handle extreme temperature changes, helping maintain consistent thermostat operation and coolant routing in the engine. Part number 902-5847 also cross-references Dayco 95217 for the same application.

Use this assembly when servicing Mercedes-Benz SL550, GLE500, GLS550, S500, S550, CLS500, CLS550, E500, GL550, ML500, and related models listed in the fitment data. The design supports OE-style replacement needs for vehicles using the listed water pump or N/A positions.

What It Helps Fix

• Coolant leaks at a cracked or warped thermostat housing
• Erratic engine temperature caused by a worn thermostat assembly
• Overheating from restricted coolant flow through the housing
• Temperature control issues after housing material fatigue
• Cooling system service needs on Mercedes-Benz V8 applications

Installation Notes

Verify engine code, model year, and position before installation. This housing uses three mounting holes and does not include mounting hardware, a bleeder hole, or a gasket/seal. Inspect the mating surfaces, replace any worn seals as required by the vehicle service procedure, and confirm the thermostat opening temperature matches the original specification before reassembly.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match stock fit and durability for the listed vehicles. The housing material and thermostat specification are selected to withstand repeated heat cycling in engine cooling service.