Dorman 902-5018 Engine Coolant Thermostat Housing

Reliable Engine Coolant Thermostat Housing for Honda and Mitsubishi

The Dorman 902-5018 engine coolant thermostat housing is designed to provide a durable and precise fit for select Honda Civic, Civic del Sol, and Mitsubishi Mirage models. Crafted from metal with a natural finish, this thermostat housing ensures efficient coolant flow and system reliability.

Key Features of the Dorman 902-5018 Thermostat Housing

• Constructed from durable metal material for long-lasting performance
• Includes a gasket for a secure, leak-free seal
• Features a 1.063-inch outlet port diameter for proper coolant flow
• Equipped with an air vent (bleeder valve) to remove trapped air from the cooling system
• Two mounting holes with a diameter of 0.313 inches for secure installation
• Housing neck angle set at 45 degrees to match OEM specifications
• Package contains the thermostat housing and gasket; thermostat and bolts are not included

Detailed Description of the Thermostat Housing

The Dorman 902-5018 thermostat housing is engineered to meet the exact specifications required by Honda Civic, Civic del Sol, and Mitsubishi Mirage vehicles. Its metal construction offers enhanced durability compared to plastic alternatives, resisting warping and cracking under high engine temperatures. The included gasket ensures a tight seal between the housing and engine block, preventing coolant leaks. The 45-degree housing neck angle and 1.063-inch outlet port diameter are designed to maintain proper coolant flow and system pressure. Additionally, the built-in air vent (bleeder valve) facilitates the removal of air pockets, which can otherwise cause overheating or inefficient cooling.

Compatible Vehicles and Common Applications

• Honda Civic (various model years)
• Honda Civic del Sol
• Mitsubishi Mirage
• Replacement for worn or cracked thermostat housings
• Addresses coolant leaks around the thermostat area
• Helps resolve engine overheating caused by faulty housing seals
• Restores proper coolant circulation and system pressure

Installation Notes and Tips

When installing the Dorman 902-5018 thermostat housing, ensure the engine is cool to avoid burns. Remove the old housing carefully, cleaning the mounting surface thoroughly before applying the new gasket. Tighten mounting bolts evenly to the manufacturer’s torque specifications to prevent leaks or damage. Note that bolts are not included with this part, so reuse existing hardware if in good condition or source OEM replacements. Bleed the cooling system after installation to remove trapped air using the built-in air vent.

Quality Assurance and Warranty Information

Dorman manufactures this thermostat housing to meet or exceed OEM standards for fit, form, and function. The metal construction and included gasket contribute to reliable, leak-free operation. 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 terms.