Dorman 902-3016 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for Jeep Cooling Systems

Dorman 902-3016 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 includes a gasket, with an integrated air vent (bleeder valve) to support proper cooling system service on 1988-1990 Jeep Cherokee, Jeep Comanche, and Jeep Wrangler applications.

Key Features

• Metal thermostat housing with natural finish
• Outlet port diameter: 1.5 in.
• Includes gasket or seal for installation
• Air vent (bleeder valve) included
• Two mounting holes with 0.313 in. diameter
• 180-degree housing neck angle
• Thermostat not included
• Package contents: thermostat housing with gasket

Detailed Description

This Dorman thermostat housing, part number 902-3016, is engineered for direct replacement use in the cooling system. Its metal construction is selected for service in environments with repeated heat cycling and temperature swings, helping the housing maintain its shape and sealing surface over time. This part cross-references Four Seasons 85225 for the same application.

Compatible With 1988-1990 Jeep Cherokee, engine coolant thermostat housing for cooling system; 1988-1990 Jeep Comanche, engine coolant thermostat housing for cooling system; and 1988-1990 Jeep Wrangler, engine coolant thermostat housing for cooling system. The 902-3016 thermostat housing is a practical choice when replacing a worn, corroded, or leaking housing on these Jeep models.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Corrosion or pitting on the original housing
• Warped sealing surfaces that affect coolant retention
• Bleeding air from the cooling system after service
• Fitment issues caused by a damaged outlet neck or mounting points

Installation Notes and Tips

Verify the outlet port diameter, mounting hole spacing, and housing neck angle before installation. Clean the mating surface thoroughly before fitting the included gasket, and confirm the cooling system is properly bled through the integrated air vent after service. This housing does not include a thermostat, so reuse or replace that component separately as needed.

Quality Assurance

Dorman designs this replacement thermostat housing to match the stock fit and durability of the original part on specified vehicles. The metal construction is intended to handle extreme temperature changes encountered in engine cooling service, supporting long-term use in Jeep Cherokee, Jeep Comanche, and Jeep Wrangler applications.