Dorman 902-3018 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for Jeep Cooling Systems

Dorman 902-3018 is a replacement engine coolant thermostat housing for specified Jeep applications. It is built from metal with a natural finish and includes a gasket for a direct cooling system service replacement.

Key Features

• Metal thermostat housing for durability in high-heat cooling system service
• Natural finish housing with a 1.5 in. outlet port diameter
• Includes gasket; thermostat is not included
• Air vent (bleeder valve) included for cooling system bleeding
• Two mounting holes with 0.313 in. mounting hole diameter
• Housing neck angle: 60 degrees
• Cross-references ACI 84801 and Anchor 8179 for the same application

Detailed Description

This Dorman 902-3018 engine coolant thermostat housing is engineered as a stock-style replacement for Jeep cooling system service. The metal construction is designed to handle repeated temperature swings, helping maintain a secure thermostat housing seal and consistent coolant routing on vehicles such as the Jeep Grand Wagoneer, Jeep J10, Jeep J20, Jeep Cherokee, Jeep Wagoneer, Jeep CJ5, and Jeep CJ7. The included gasket supports a proper seal at installation, while the integrated bleeder valve helps with air removal during refill and service.

Compatible With 1979-1991 Jeep Grand Wagoneer, Jeep J10, Jeep J20, Jeep Cherokee, Jeep Wagoneer, Jeep CJ5, and Jeep CJ7 applications, this thermostat housing is a practical replacement when servicing the cooling system on older Jeep platforms. Part number 902-3018 is also referenced by 814801, 3238509, CH4018, and TC179V.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or corroded original housing
• Improper sealing at the thermostat mounting surface
• Air trapped in the cooling system after service
• Cooling system maintenance on aging Jeep engines

Installation Notes and Tips

Verify the outlet port diameter, mounting hole spacing, and 60-degree neck angle before installation. Use the included gasket during assembly, and confirm the thermostat is transferred or replaced separately as needed. Bleed the cooling system after refill using the integrated air vent to reduce trapped air.

Quality Assurance

Dorman designs this replacement thermostat housing to match the fit and durability of the original housing on specified vehicles and to withstand extreme temperature changes for extended service life.