Dorman 555-048 Engine Expansion Plug

Overview of Dorman Engine Core Plug 555-048

The Dorman 555-048 engine core plug is a steel cup type expansion plug designed for reliable sealing in various engine applications. Compatible with multiple Buick, Ford, Mazda, and Mercury models, this core plug ensures proper engine block sealing to maintain optimal performance.

• Constructed from durable steel material for long-lasting use
• Cup type design for secure and effective sealing
• Maximum diameter of 2.071 inches and minimum diameter of 2.061 inches for precise fit
• Compatible with a wide range of Buick, Ford, Mazda, and Mercury vehicles
• Includes one expansion plug per package

Detailed Product Description

The Dorman 555-048 engine core plug is engineered from steel to provide strength and resistance to engine heat and pressure. Its cup type design allows it to fit securely within the engine block, preventing coolant leaks and maintaining engine integrity. With a maximum diameter of 2.071 inches and a minimum diameter of 2.061 inches, this plug offers a precise fit for the specified vehicle models. This part is suitable for use in engines of Buick models like Century and LeSabre, Ford models including Bronco and Mustang, Mazda B2300, and Mercury Cougar among others.

Common Applications and Problem Solving

• Seals core holes in engine blocks to prevent coolant leaks
• Replaces worn or corroded core plugs causing engine overheating
• Prevents contamination of engine coolant system
• Helps maintain proper engine pressure and temperature
• Restores engine block integrity after repair or maintenance

Installation Notes and Tips

Before installation, ensure the engine block surface is clean and free of debris. The Dorman 555-048 core plug should be pressed evenly into the core hole using appropriate tools to avoid damage. Verify the plug is fully seated to prevent leaks. It is recommended to inspect surrounding areas for corrosion or damage during replacement. Proper installation will help maintain engine cooling system efficiency.

Quality Assurance and Warranty

Dorman engine core plugs are manufactured to meet or exceed OEM specifications, ensuring reliable performance. The 555-048 part number undergoes quality control testing for material integrity and dimensional accuracy. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship to provide confidence in product durability.