Dorman 902-5118 Engine Coolant Thermostat Housing Assembly

Reliable Engine Coolant Thermostat Housing Assembly for BMW Models

The Dorman 902-5118 Engine Coolant Thermostat Housing Assembly is designed to maintain optimal engine temperature for select BMW vehicles. Engineered with durable plastic and including a thermostat and gasket, this assembly supports efficient cooling system performance for BMW 318i, 318is, 318ti, and Z3 models.

Key Features of Dorman 902-5118 Thermostat Housing

• Constructed from durable black plastic for corrosion resistance
• Includes one thermostat calibrated to open at 203°F for precise temperature control
• Comes with a gasket to ensure a secure, leak-free seal
• Features four mounting holes for stable installation
• Flange dimensions: 4.5 inches length and width, 0.45 inches thickness
• One outlet port designed for efficient coolant flow
• Compatible with BMW 318i, 318is, 318ti, and Z3 models

Detailed Product Description

The Dorman 902-5118 thermostat housing assembly is a critical component in the cooling system of BMW 318i, 318is, 318ti, and Z3 vehicles. Made from high-quality plastic, it offers resistance to corrosion and heat, extending the life of the cooling system. The included thermostat opens at 203 degrees Fahrenheit, ensuring the engine reaches and maintains the correct operating temperature. The assembly features four mounting holes with precise bolt hole center measurements (3.1 in, 3.2 in, 4 in, 3 in) for secure attachment. The flange size of 4.5 by 4.5 inches with a thickness of 0.45 inches provides a stable and reliable fit. This assembly also includes a gasket to prevent coolant leaks and maintain system integrity.

Common Applications and Issues Addressed

• Replacement for faulty or leaking thermostat housing assemblies in BMW 318i, 318is, 318ti, and Z3
• Resolves engine overheating caused by thermostat failure
• Prevents coolant leaks due to worn or damaged housing gaskets
• Restores proper coolant flow and temperature regulation
• Addresses issues related to cracked or warped plastic housings

Installation Notes and Tips

Ensure the engine is cool before beginning installation to avoid burns. Remove the old thermostat housing carefully, cleaning the mounting surface thoroughly to remove any old gasket material. Use the included gasket to create a proper seal and tighten mounting bolts evenly to the manufacturer’s torque specifications. Note that mounting hardware is not included with this assembly and must be reused or sourced separately.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5118 thermostat housing assembly undergoes rigorous quality control to ensure durability and reliable performance. While specific warranty details are not provided, Dorman typically offers limited warranties on their replacement parts to cover defects in material and workmanship.