Dorman 902-5904 Engine Coolant Thermostat Housing

Overview of Dorman Engine Coolant Thermostat Housing 902-5904

The Dorman 902-5904 engine coolant thermostat housing is designed for reliable cooling system performance in select Toyota and Scion vehicles. Constructed from durable black plastic, this thermostat housing provides a precise fit and efficient coolant flow for models like the Toyota Camry, Highlander, RAV4, Sienna, tC, and Venza.

• Material: High-quality black plastic for corrosion resistance
• Outlet port diameter: 1.5 inches for optimal coolant flow
• Mounting holes: Two holes with 0.313-inch diameter for secure installation
• Housing neck angle: 45 degrees to match OEM specifications
• Includes thermostat housing only; no thermostat, gasket, bolts, or O-rings included

Detailed Product Description

The Dorman 902-5904 thermostat housing is engineered to meet the exact specifications required by Toyota and Scion vehicles, including the Camry, Highlander, RAV4, Sienna, tC, and Venza. Made from durable plastic, this housing resists corrosion and heat damage commonly found in engine cooling systems. The 1.5-inch outlet port diameter ensures proper coolant circulation, while the 45-degree housing neck angle aligns with factory designs for seamless integration. With two mounting holes sized at 0.313 inches, installation is straightforward and secure. This part does not include a thermostat, gasket, bolts, or O-rings, so those components must be sourced separately if needed.

Common Applications and Issues Addressed

• Replacement for cracked or leaking thermostat housing
• Prevents coolant leaks that can cause engine overheating
• Restores proper coolant flow in Toyota Camry and Highlander cooling systems
• Eliminates coolant contamination from damaged housing
• Supports efficient engine temperature regulation in RAV4, Sienna, tC, and Venza models

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Inspect and replace the thermostat, gasket, and mounting bolts as needed since they are not included
• Clean the mounting surface thoroughly to ensure a proper seal
• Torque mounting bolts to manufacturer specifications to prevent leaks
• Check coolant levels and system pressure after installation

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5904 thermostat housing undergoes rigorous quality control to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Refer to Dorman’s official warranty policy for complete information.