Dorman 902-1003 Engine Coolant Thermostat Housing - Lower or Upper

Overview of Dorman Engine Coolant Thermostat Housing 902-1003

The Dorman 902-1003 engine coolant thermostat housing is designed for reliable cooling system performance in select Ford, Lincoln, and Mercury vehicles. Constructed from durable metal with a natural finish, this thermostat housing ensures proper coolant flow and temperature regulation for your engine.

• Durable metal construction with natural color finish
• Includes gasket for secure sealing
• 1.5-inch outlet port diameter for optimal coolant flow
• Equipped with an air vent (bleeder valve) to prevent airlocks
• Two mounting holes with 0.313-inch diameter for secure installation
• 180-degree housing neck angle for precise fitment
• Thermostat not included; housing only

Detailed Product Description

The Dorman 902-1003 engine coolant thermostat housing is engineered to meet the specifications of various Ford, Lincoln, and Mercury models, including the Bronco, Mustang, Explorer, F-150, and Continental. Its metal construction provides strength and resistance to heat and corrosion, essential for maintaining the integrity of the cooling system. The included gasket ensures a tight seal between the housing and engine block, preventing coolant leaks. The 1.5-inch outlet port diameter supports efficient coolant circulation, while the integrated air vent (bleeder valve) helps eliminate trapped air, reducing the risk of overheating.

Compatible Vehicles and Applications

This thermostat housing is compatible with a range of Ford, Lincoln, and Mercury vehicles, such as:

• Ford Bronco, Mustang, Explorer, F-100, F-150, F-250, F-350
• Lincoln Continental, Mark VII, Town Car
• Mercury Cougar, Capri, Mountaineer, Thunderbird
• Ford Econoline series including E-100, E-150, E-250, and E-350 (Club Wagon variants included)

Common Issues Addressed by This Thermostat Housing

• Coolant leaks due to cracked or damaged housing
• Overheating caused by improper coolant flow
• Air trapped in the cooling system leading to inefficient cooling
• Corrosion or wear compromising the housing seal
• Failed thermostat housing mounting points causing instability

Installation Notes and Tips

When installing the Dorman 902-1003 thermostat housing, ensure the gasket is properly seated to prevent leaks. The housing features two mounting holes with a diameter of 0.313 inches, so use appropriate bolts (not included) for secure attachment. The 180-degree housing neck angle must align correctly with the vehicle’s cooling system hoses. Bleed the cooling system after installation to remove air via the built-in air vent valve. Note that the thermostat is not included and must be installed separately if needed.

Quality Assurance and Warranty

Dorman manufactures this thermostat housing to meet or exceed OEM standards for fit, form, and function. The metal construction and included gasket contribute to long-lasting 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.