Dorman 555-052 Engine Expansion Plug

Overview of Dorman Engine Core Plug 555-052

The Dorman 555-052 engine core plug is a steel cup type expansion plug designed for reliable sealing in engine blocks. This part is compatible with select Buick, Oldsmobile, and Pontiac models, providing a precise fit for vehicles such as the Century, Cutlass, and LeSabre.

• Constructed from durable steel material for long-lasting performance
• Cup type design ensures secure sealing in engine block openings
• Maximum diameter of 2.264 inches and minimum diameter of 2.251 inches for accurate fitment
• Compatible with Buick Century, Oldsmobile Cutlass, and Pontiac LeSabre among others
• Sold as a single expansion plug for engine core sealing

Detailed Product Description

The Dorman 555-052 engine core plug is engineered to meet the specifications required for proper sealing of engine block core holes. Made from steel, this cup type expansion plug offers resistance to engine heat and pressure, helping to maintain engine integrity. With a maximum diameter of 2.264 inches and a minimum diameter of 2.251 inches, it fits precisely into the designated core plug openings on compatible Buick, Oldsmobile, and Pontiac engines. This ensures a tight seal that prevents coolant or oil leaks, which can lead to engine damage if left unaddressed.

Compatible Vehicles and Applications

This engine core plug is compatible with a range of GM vehicles, including:

• Buick Century and Skylark
• Oldsmobile Cutlass, LeSabre, and Riviera
• Pontiac Tempest and Roadmaster

Using the correct core plug like the Dorman 555-052 helps maintain engine block integrity and prevents fluid leaks in these specific models.

Common Issues Addressed by This Core Plug

• Sealing engine block core holes to prevent coolant leaks
• Preventing oil leaks from engine block openings
• Replacing corroded or damaged core plugs in Buick, Oldsmobile, and Pontiac engines
• Maintaining proper engine pressure and fluid containment
• Reducing risk of engine overheating due to fluid loss

Installation Notes and Tips

• Ensure the engine block core hole is clean and free of debris before installation
• Verify the diameter of the core hole matches the plug dimensions (2.251" to 2.264") for a secure fit
• Use appropriate tools to press the cup type plug evenly into place without damaging the plug or engine block
• Inspect surrounding areas for corrosion or damage that may require additional repair

Quality Assurance and Warranty

Dorman manufactures the 555-052 engine core plug to meet industry standards for durability and fitment. The steel construction provides resistance to engine heat and corrosion. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship to ensure customer confidence in the product's reliability.