Dorman 555-040 Engine Core Plug

Overview of Dorman Engine Core Plug 555-040

The Dorman 555-040 engine core plug is designed specifically for Buick Roadmaster models, providing a reliable seal for engine block openings. Made from durable steel, this cup-type expansion plug ensures a secure fit and long-lasting performance in your vehicle's engine system.

• Constructed from high-quality steel for durability
• Cup-type design for effective sealing
• Maximum diameter of 1.953 inches and minimum diameter of 1.94 inches for precise fit
• Compatible with Buick Roadmaster engine blocks
• Sold as a single expansion plug

Detailed Product Description

The Dorman 555-040 engine core plug is engineered to meet the specifications required for Buick Roadmaster engines. Its steel construction offers resistance to corrosion and wear, which is critical for maintaining engine integrity. The cup-type design allows the plug to expand and create a tight seal within the engine block, preventing coolant or oil leaks. With a maximum diameter of 1.953 inches and a minimum diameter of 1.94 inches, this plug fits precisely into the designated core hole, ensuring proper sealing and engine performance.

Common Applications and Problem Solving

• Sealing core holes left after engine block casting
• Preventing coolant leaks in Buick Roadmaster engines
• Replacing worn or damaged expansion plugs to maintain engine pressure
• Addressing oil leaks caused by faulty core plugs
• Restoring engine block integrity during rebuilds or repairs

Installation Notes and Tips

When installing the Dorman 555-040 engine core plug, ensure the engine block surface is clean and free of debris. The plug should be carefully pressed or tapped into place to avoid damage. Verify the plug’s diameter matches the core hole to prevent leaks. It is recommended to inspect surrounding areas for corrosion or damage during replacement to maintain optimal engine performance.

Quality Assurance and Warranty

Dorman manufactures the 555-040 engine core plug to meet industry standards for fit and function. The steel material provides durability and resistance to engine environment conditions. While specific warranty details are not provided, Dorman products typically undergo quality control processes to ensure reliability and compatibility with Buick Roadmaster vehicles.