Dorman 902-5903 Engine Coolant Thermostat Housing Assembly

Overview of Dorman Engine Coolant Thermostat Housing Assembly

The Dorman 902-5903 Engine Coolant Thermostat Housing Assembly is designed for reliable cooling system performance in select Dodge and Mercedes-Benz vehicles. This metal thermostat housing assembly includes a thermostat and gasket, engineered to maintain optimal engine temperature and prevent overheating.

• Durable metal construction with natural finish
• Includes thermostat opening at 212°F for precise temperature control
• Comes with gasket and sensor for complete installation
• Designed with two mounting holes and a single outlet port
• Compatible with various Dodge and Mercedes-Benz models including CL500, E550, GL450, and Sprinter 2500

Detailed Product Features and Specifications

The Dorman 902-5903 thermostat housing assembly features a metal build that ensures durability and heat resistance. The natural color finish complements the engine bay without corrosion concerns. It has an inside diameter of 1.861 inches, with a flange length of 4.12 inches, flange width of 3.168 inches, and flange thickness of 0.411 inches, providing a precise fit. The assembly includes a thermostat calibrated to open at 212 degrees Fahrenheit, helping regulate coolant flow effectively. Two mounting holes spaced 3.87 inches apart allow secure attachment, while the included gasket ensures a tight seal to prevent leaks. This assembly does not include mounting hardware but comes with a sensor and thermostat for a comprehensive replacement solution.

Compatible Vehicles and Applications

This thermostat housing assembly is compatible with a range of Dodge and Mercedes-Benz vehicles. It fits models such as the Dodge Sprinter 2500 and 3500, and Mercedes-Benz CL500, CL550, CLS350, CLS500, E250, E300, E500, E550, G500, G550, GL450, GL500, GL550, ML500, ML550, R550, S450, S500, S550, SL500, and SL550. The Dorman 902-5903 is ideal for owners seeking a direct replacement part that meets factory specifications for these vehicles.

Common Issues Addressed by This Thermostat Housing Assembly

• Engine overheating due to thermostat failure
• Coolant leaks from damaged or warped housing
• Inconsistent engine temperature regulation
• Faulty thermostat causing poor fuel efficiency
• Corrosion or cracking in original thermostat housing

Installation Notes and Tips

When installing the Dorman 902-5903 thermostat housing assembly, ensure the engine is cool before beginning work. Remove the old housing carefully to avoid damaging surrounding components. Use the included gasket to create a proper seal and prevent coolant leaks. Note that mounting hardware is not included, so retain or replace bolts as needed. Verify the thermostat opening temperature matches vehicle specifications (212°F) for optimal performance. Proper torque on mounting bolts is essential to avoid warping the flange.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 902-5903 thermostat housing assembly undergoes quality checks to ensure fit and function. This product includes a gasket and thermostat to facilitate a complete and dependable replacement. Warranty coverage details can be obtained from the product documentation or manufacturer, ensuring peace of mind with your purchase.