Dorman Engine Coolant Thermostat Housing Assembly 902-3312 — Direct-Fit Heat-Resistant Replacement

The Dorman 902-3312 engine coolant thermostat housing assembly is a direct-fit replacement water outlet engineered to restore proper coolant flow and durable sealing on compatible Dodge, Jeep, Ram, Chrysler and Mitsubishi models.

This thermostat housing assembly is built to match the original equipment contours and connection points for the listed model years, helping you replace a cracked, leaking, or worn thermostat outlet with minimal modification. Dorman designed the unit to tolerate thermal cycling and under-hood stresses, reducing the likelihood of premature failure compared with brittle or corroded OEM housings. Always verify vehicle compatibility by entering your trim into the garage tool and checking the Confirmed Fit indicator before ordering.

How does this part ensure a reliable coolant seal?

The assembly is engineered to align with factory mounting points and mating surfaces so gaskets and hoses seat correctly, preventing leaks. Materials and design choices reduce vulnerability to heat-related cracking and warping.

• Precision-molded flange and port surfaces for accurate gasket compression
• Heat-resistant compound that resists thermal cycling
• Integrated mounting bosses to maintain correct bolt torque and alignment

Will this Dorman housing fit my vehicle and how can I confirm fitment?

This part covers many model years across Dodge, Jeep, Ram, Chrysler and Mitsubishi — but fit depends on engine and trim. Use the site’s garage tool to input your vehicle; check the Confirmed Fit bar and hover over any blue “i” icons for specific fit notes.

• Supported models include Dodge Dakota, Durango, Nitro, Ram 1500/2500, Jeep Grand Cherokee, Liberty, Commander, Chrysler Aspen and Mitsubishi Raider
• Model years vary by vehicle — verify exact year and engine option in the fitment tool
• Contact customer support with VIN for definitive compatibility if unsure

What installation and durability benefits can I expect?

The housing is designed to be a straightforward replacement that minimizes installation complexities while providing long-term resilience under engine heat. It is suitable for workshop replacement during thermostat or cooling-system repairs.

• Direct-replacement geometry for simple bolt-on installation
• Robust construction to resist cracking and leaking over repeated heat cycles
• Compatible with common coolant hoses and thermostat units used in covered vehicles

How does Dorman’s experience affect part quality?

Dorman has decades of aftermarket experience and applies design and manufacturing practices tailored for replacement parts that meet or exceed everyday service demands. The company focuses on consistent fit, finish, and functional reliability across its cooling system components.

• Aftermarket engineering intended to mirror OE mounting and sealing surfaces
• Quality checks to reduce dimensional variation and leaks
• Customer support and fitment guidance available for peace of mind

Who is this for: This Dorman 902-3312 thermostat housing assembly is for DIY mechanics, professional technicians, and fleet maintenance teams who need a dependable, direct-fit water outlet replacement for the specified Dodge, Jeep, Ram, Chrysler and Mitsubishi vehicles. Choose this part when the original housing shows signs of cracking, coolant leakage, warped mating surfaces, or when performing thermostat and coolant system service; confirm fitment with the garage tool before purchase.