Dorman 902-819 Engine Coolant Thermostat Housing Assembly - Water Pump

Reliable Engine Coolant Thermostat Housing Assembly for BMW Models

The Dorman 902-819 Engine Coolant Thermostat Housing Assembly is designed to maintain optimal engine temperature for select BMW vehicles. Crafted from durable aluminum with a silver finish, this thermostat housing assembly ensures consistent performance and longevity for your BMW 540i, 740i, 740iL, X5, and Z8 models.

• Constructed from high-quality aluminum material for durability
• Includes thermostat with a 221°F opening temperature for precise temperature regulation
• Comes with a gasket to ensure a secure, leak-free seal
• Features four mounting holes for secure installation
• Compatible with BMW 540i, 740i, 740iL, X5, and Z8 vehicles
• Silver color finish matches OEM appearance
• Includes one thermostat housing assembly and one sensor

Product Details and Specifications

This Dorman thermostat housing assembly (part number 902-819) is engineered with a 1.28-inch inside diameter and a single outlet port to fit the cooling system requirements of your BMW. The flange dimensions—3.62 inches in length, 3.61 inches in width, and 0.38 inches in thickness—ensure a precise fit. The assembly includes a gasket to prevent coolant leaks, although mounting hardware is not included. The bolt hole center-to-center measurements vary between 2.28 and 2.749 inches, accommodating the specific mounting points on compatible BMW models.

Compatible BMW Models and Applications

This thermostat housing assembly is compatible with the following BMW vehicles: 540i, 740i, 740iL, X5, and Z8. It is designed to replace the original thermostat housing and maintain proper engine temperature by regulating coolant flow. Using the Dorman 902-819 part ensures your engine cooling system operates efficiently, helping to prevent overheating and maintain engine performance.

• Prevents engine overheating by regulating coolant flow
• Replaces cracked or leaking thermostat housings
• Resolves coolant leaks around the thermostat area
• Restores proper thermostat function with included thermostat
• Helps maintain consistent engine operating temperature

Installation Notes and Tips

When installing the Dorman 902-819 thermostat housing assembly, ensure the engine is cool before beginning work. Remove the old thermostat housing carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly before placing the new gasket and housing assembly. Since mounting hardware is not included, reuse the original bolts or acquire compatible replacements. Verify the thermostat opening temperature of 221°F matches your vehicle’s specifications. Proper torque on mounting bolts is essential to prevent leaks.

Quality Assurance and Warranty

Dorman manufactures this thermostat housing assembly to meet or exceed OEM standards for fit and function. The aluminum construction provides corrosion resistance and durability under normal operating conditions. The included thermostat is calibrated for accurate temperature control at 221°F. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts to ensure customer confidence and product reliability.