Dorman 555-008 Engine Rocker Arm Shaft End Plug

Overview of Dorman Engine Rocker Arm Shaft End Plug 555-008

The Dorman Engine Rocker Arm Shaft End Plug 555-008 is designed to provide a secure seal for the rocker arm shaft in select Chevrolet, Oldsmobile, and Pontiac engines. Manufactured from durable steel, this cup-type expansion plug ensures reliable performance in various engine applications including the Chevrolet Impala and Pontiac Bonneville.

• Constructed from high-strength steel for durability
• Cup-type design for effective sealing and fit
• Maximum diameter of 0.574 inches and minimum diameter of 0.558 inches for precise fitment
• Compatible with multiple GM models such as Chevrolet Bel Air, Oldsmobile Starfire, and Pontiac Sunbird
• Includes one expansion plug per package

Detailed Product Description

The Dorman 555-008 Engine Rocker Arm Shaft End Plug is engineered to meet the exact specifications required for proper sealing of the rocker arm shaft ends. Its steel construction offers resistance to wear and heat, which is critical in maintaining engine integrity. The cup-type design allows the plug to expand securely within the shaft bore, preventing oil leaks and contamination. With diameters ranging from 0.558 to 0.574 inches, this plug fits tightly in the rocker arm shaft housing, ensuring consistent engine performance.

Compatible Vehicles and Applications

This expansion plug is compatible with a range of Chevrolet, Oldsmobile, and Pontiac vehicles, including but not limited to:

• Chevrolet Acadian, Bel Air, Corvette, El Camino, Impala
• Oldsmobile Starfire, Laurentian, Parisienne
• Pontiac Bonneville, Catalina, Monza, Sunbird

Use of the Dorman 555-008 plug in these models helps maintain proper engine function by sealing the rocker arm shaft ends effectively.

Common Issues Addressed by This Part

• Prevents oil leaks from rocker arm shaft ends
• Stops contamination entering the rocker arm shaft area
• Reduces risk of engine wear due to improper sealing
• Maintains correct oil pressure within the rocker arm assembly
• Eliminates noise caused by loose or damaged shaft plugs

Installation Notes and Tips

• Ensure the rocker arm shaft bore is clean and free of debris before installation
• Verify the plug diameter matches the shaft bore dimensions (0.558 to 0.574 inches)
• Use appropriate tools to press the plug evenly into place without damaging the cup-type end
• Inspect the plug after installation for a secure fit and proper sealing

Quality Assurance and Warranty

Dorman manufactures the 555-008 Engine Rocker Arm Shaft End Plug to meet industry standards for material quality and dimensional accuracy. The steel construction is tested for durability under typical engine operating conditions. While specific warranty details may vary, Dorman products generally come with a limited warranty against defects in material and workmanship, providing confidence in the part’s reliability.