Dorman 902-5027 Engine Coolant Thermostat Housing

Overview of Dorman Engine Coolant Thermostat Housing 902-5027

The Dorman 902-5027 engine coolant thermostat housing is designed for reliable cooling system performance in Mercury Quest and Nissan Villager vehicles. Constructed from durable metal with a natural finish, this thermostat housing ensures a secure fit and efficient coolant flow.

• Material: Metal construction for durability
• Color: Natural metal finish
• Outlet port diameter: 1 inch
• Includes gasket for proper sealing
• Four mounting holes with 0.313 inch diameter
• Housing neck angle: 90 degrees for precise fitment
• Package includes thermostat housing and gasket
• Compatible with Mercury Quest and Nissan Villager models

Detailed Product Description

The Dorman 902-5027 thermostat housing is engineered to replace the original part in select Mercury Quest and Nissan Villager vehicles. Its metal construction provides strength and resistance to heat and corrosion, essential for maintaining the integrity of the engine's cooling system. The natural finish allows for easy inspection and installation. The housing features a 1-inch outlet port diameter and a 90-degree neck angle, matching OEM specifications to ensure proper coolant flow and fitment. Four mounting holes with a diameter of 0.313 inches secure the housing firmly in place. This product includes a gasket to prevent leaks but does not include bolts or a thermostat.

Common Applications and Issues Addressed

• Replacement for cracked or leaking thermostat housing
• Resolves coolant leaks around the thermostat area
• Prevents engine overheating due to faulty housing
• Restores proper coolant flow in Mercury Quest and Nissan Villager
• Addresses corrosion or wear in original thermostat housing

Installation Notes and Tips

Before installation, ensure the engine is cool and the cooling system is depressurized. Remove the old thermostat housing carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly to ensure a proper seal with the included gasket. Use the original mounting bolts or equivalent hardware, as bolts are not included. Tighten mounting bolts evenly to the manufacturer's torque specifications to prevent leaks. Verify the housing neck angle and outlet port diameter match your vehicle's requirements for proper fitment.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5027 thermostat housing undergoes rigorous quality control to ensure durability and reliable performance in Mercury Quest and Nissan Villager vehicles. This part includes a gasket for sealing but does not come with a thermostat or bolts. Warranty coverage details can be obtained from the product documentation or Dorman directly.