Dorman 902-3001 Engine Coolant Filler Neck

Engine Coolant Thermostat Housing for Neon

This Dorman engine coolant thermostat housing is a direct replacement for specified Dodge, Chrysler, and Plymouth applications. Built from black plastic with a 30-degree neck angle, it is made to match the original fit and handle repeated temperature swings in the cooling system.

Compatible with 2000-2005 Dodge Neon, 2000-2002 Chrysler Neon, 2000-2001 Plymouth Neon, 2000 Chrysler Cirrus, 2000 Dodge Stratus, and 2000 Plymouth Breeze. Part number 902-3001 is a practical OE-style solution for cooling system service on these vehicles.

Key Features

• Direct replacement thermostat housing for specified cooling system applications
• Plastic construction with black finish
• 1.25 in. outlet port diameter
• Gasket included for sealing at installation
• Two mounting holes with 0.313 in. diameter
• 30-degree housing neck angle for proper hose routing
• No thermostat included
• No bleeder valve and no bolts included

Detailed Description

Dorman 902-3001 is engineered to match the fit and durability of the stock thermostat housing on listed vehicles. It serves as the coolant filler neck and thermostat housing interface in the engine cooling system, helping maintain a secure seal where coolant flow and temperature control components meet. The included gasket supports a proper seal, while the molded plastic housing is built for service in high-heat, high-cycling conditions. This part cross-references Gates CO34755 for the same application.

Common Problems This Part Can Address

• Coolant leaks at the thermostat housing or filler neck
• Cracked or warped original plastic housing
• Improper hose alignment at the outlet neck
• Sealing issues caused by worn housing surfaces
• Cooling system service on a damaged OE housing

Installation Notes and Tips

• Verify vehicle fitment by year, make, and model before installation.
• Inspect the mating surface and coolant hose condition before reassembly.
• Use the included gasket during installation and confirm a clean, flat sealing surface.
• Transfer the thermostat separately if your application requires one, since it is not included.
• Refill and bleed the cooling system according to the vehicle service procedure after installation.

Quality Assurance

Dorman designs replacement cooling system components to match original equipment fit and service requirements for the listed applications. Part number 902-3001 is built for specified Dodge Neon, Chrysler Neon, and Plymouth Neon fitments, along with the related Cirrus, Stratus, and Breeze applications shown above.