Dorman 902-2133 Engine Coolant Filler Neck

Reliable Engine Coolant Filler Neck for Buick and Chevrolet Models

The Dorman 902-2133 engine coolant filler neck is designed to provide a secure and durable connection for your vehicle's cooling system. Engineered for select Buick and Chevrolet models, this plastic filler neck ensures proper coolant flow and system integrity.

• Constructed from durable black plastic material
• Maximum pressure rating of 15 psi for reliable performance
• Outside diameter measures 1.38 inches for precise fitment
• Single port design compatible with heater hose assembly
• Clockwise screw-on attachment method for secure installation
• Compatible with Buick Allure, Chevrolet HHR, and LaCrosse models

Product Details and Specifications

The Dorman 902-2133 engine coolant filler neck is made from high-quality plastic, providing resistance to corrosion and heat commonly found in engine compartments. Its black finish blends seamlessly with the engine bay components. The filler neck features a 1.38-inch outside diameter and supports a maximum pressure of 15 psi, ensuring it can handle typical cooling system pressures without failure. Designed with a single port for the heater hose assembly, this part uses a clockwise screw-on installation method, allowing for straightforward replacement without the need for additional mounting hardware or clamps.

Compatible Vehicles and Applications

This engine coolant filler neck is specifically compatible with the following vehicles:

• Buick Allure
• Chevrolet HHR
• Chevrolet LaCrosse

Use the Dorman 902-2133 to replace worn or damaged filler necks in these models to maintain proper coolant system function and prevent leaks.

Common Issues Addressed by This Part

• Cracked or brittle filler neck causing coolant leaks
• Damaged or warped filler neck leading to improper sealing
• Corrosion or wear from prolonged exposure to engine heat
• Loose or stripped filler neck threads affecting coolant pressure
• Replacement of missing or broken filler neck components

Installation Notes and Tips

Installation of the Dorman 902-2133 engine coolant filler neck requires a clockwise rotation to screw the part securely onto the engine. No clamps or mounting hardware are included, so ensure existing components are in good condition or replaced as needed. Verify the outside diameter and port compatibility before installation to ensure a proper fit. It is recommended to inspect the cooling system for leaks after installation and refill coolant to the appropriate level.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. While specific warranty details for part number 902-2133 are not provided here, Dorman typically offers limited warranties covering defects in material and workmanship. Refer to official Dorman documentation for complete warranty information.