Dorman 902-1039 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for Ford and Mercury

Dorman 902-1039 is a replacement engine coolant thermostat housing built to match the fit and durability of the original housing on specified vehicles. It is made from metal and engineered to handle repeated temperature swings in the cooling system.

Compatible with 1983-1990 Ford Mustang, 1983-1986 Ford LTD, 1983-1986 Mercury Capri, and 1983-1986 Mercury Marquis, this thermostat housing includes a gasket for a direct cooling system service replacement. The natural-finish housing uses a 45-degree neck angle and a 1.188-inch outlet port diameter.

Key Features

• Metal construction for cooling system durability
• Includes gasket or seal for installation
• 45-degree housing neck angle
• 1.188-inch outlet port diameter
• Two mounting holes with 0.313-inch diameter
• No thermostat included
• No bleeder valve and no bolts included
• Natural finish

Detailed Description

This Dorman thermostat housing, part number 902-1039, is a direct replacement for the engine coolant thermostat housing used on select Ford and Mercury applications. It is designed to match the original housing’s fit and withstand extreme temperature changes, helping maintain a reliable seal at the cooling system connection. This part cross-references Four Seasons 84974 for the same application.

Use 902-1039 when servicing a leaking, warped, or corroded thermostat housing on a Ford Mustang, Ford LTD, Mercury Capri, or Mercury Marquis. The metal housing and included gasket support a clean replacement at the thermostat outlet connection.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Warped or corroded housing surfaces
• Damaged sealing surfaces at the coolant outlet
• Cooling system service issues on Ford Mustang and Mercury Capri applications
• Fitment problems caused by an incorrect replacement housing

Installation Notes and Tips

Confirm the outlet port diameter, 45-degree neck angle, and two-hole mounting pattern before installation. Transfer the thermostat only if the application requires it, since the thermostat is not included. Clean the mating surfaces thoroughly and replace any worn fasteners as needed, since bolts are not included.

Quality Assurance

Dorman designs this replacement housing to match stock fit and durability on the listed vehicles. The metal construction is built for repeated thermal cycling in the engine cooling system.