Dorman 902-312 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for Jeep, Dodge, Ram

Dorman 902-312 is a replacement engine coolant thermostat housing built to match the fit and durability of the original housing on specified vehicles. It is made for applications such as Jeep Liberty, Dodge Dakota, and Ram 1500 cooling system repairs, with a plastic black housing that is shaped for the correct outlet and mounting layout.

• Replacement engine coolant thermostat housing for specified Chrysler, Dodge, Jeep, Ram, Chrysler, and Mitsubishi applications
• Plastic construction with black finish
• Outlet port diameter: 1.785 in.
• Housing neck angle: 75°
• 2 mounting holes with 0.293 in. mounting hole diameter
• No thermostat, gasket, O-rings, bolts, or bleeder valve included

Detailed Product Overview

This Dorman thermostat housing is engineered for direct replacement use where the original water outlet has cracked, warped, or leaked. The housing is designed to handle repeated temperature swings in the cooling system, helping maintain a secure seal and proper coolant routing on vehicles including 2002-2013 Jeep Liberty, 2000-2010 Dodge Dakota, and 2002-2010 Dodge Ram 1500. Part number 902-312 also cross-references Mopar 53020887AD for the same application.

Common Repair Uses

• Coolant leaks at the thermostat housing or water outlet
• Cracked or heat-damaged plastic housing
• Warped sealing surface causing seepage
• Cooling system service on Jeep Liberty, Dodge Dakota, or Ram 1500
• Replacement of a worn OE-style thermostat housing assembly

Installation Notes and Tips

Verify the outlet port diameter, neck angle, and mounting-hole layout before installation. This housing does not include the thermostat, gasket, O-rings, or bolts, so those service parts must be sourced separately as needed. Clean the mating surfaces thoroughly and inspect adjacent cooling system components before reassembly.

Quality Assurance

Dorman designs this replacement housing to match the stock fit and durability of the original part on listed vehicles. It is built to withstand extreme temperature changes for extended service life in normal cooling system operation.