Dorman 555-047 Engine Camshaft Plug

Dorman 555-047 Engine Camshaft Plug

Dorman 555-047 is an engine camshaft plug built to match the fit and function of the original part on specified vehicles. Made from steel, it is engineered for reliable sealing performance in applications that call for a shallow cup-style expansion plug.

Compatible with a wide range of classic Pontiac, Buick, and Oldsmobile engines, this camshaft plug supports OE-style service work on vehicles such as the Pontiac GTO, Pontiac LeMans, and Buick Skylark. The Dorman 555-047 is sized for applications that require a 2.052 in. closed end diameter and a 2.065 in. open end diameter.

Key Features

• Steel construction for durable engine service use
• OE-style fit and function for specified camshaft plug applications
• Closed end diameter: 2.052 in.
• Open end diameter: 2.065 in.
• Designed for shallow cup-style engine applications
• Interchange reference: 523096

Detailed Description

This engine camshaft plug is a direct-fit replacement for select Pontiac, Buick, and Oldsmobile engines across model years from 1956 through 1981. It is commonly used in restoration and repair work where the original camshaft plug has worn, corroded, or no longer seals properly. The steel construction helps maintain a secure seal in the engine block area, while the dimensional specifications support accurate replacement selection for the listed applications. Dorman 555-047 is a practical choice for service on Pontiac Firebird, Grand Prix, Catalina, and GTO applications, as well as Buick Century, LeSabre, Regal, and Skylark models.

This part cross-references 523096 for the same application.

What It Helps Fix

• Oil leakage from a worn or damaged camshaft plug
• Corrosion-related sealing failure in the engine block
• Improper fit from an incorrect replacement plug
• Restoration issues on classic Pontiac, Buick, and Oldsmobile engines
• Service problems caused by a plug that no longer holds securely

Installation Notes and Tips

Verify the required diameter and shallow cup style before installation. Clean the bore thoroughly and inspect the surrounding engine surface for wear, pitting, or debris that could affect sealing. Confirm vehicle-specific fitment for your exact year, make, and model before ordering. Fits 1967-1981 Pontiac Firebird, N/A; Fits 1979-1981 Pontiac Grand LeMans, N/A; Fits 1975-1977 Pontiac Grand LeMans, N/A; Fits 1979-1981 Pontiac LeMans, N/A; Fits 1963-1977 Pontiac LeMans, N/A; Fits 1979-1980 Buick Century, N/A; Fits 1977-1980 Buick LeSabre, N/A; Fits 1975 Buick LeSabre, N/A; Fits 1979-1980 Buick Regal, N/A; Fits 1959-1980 Pontiac Bonneville, N/A; Fits 1957 Pontiac Bonneville, N/A; Fits 1959-1980 Pontiac Catalina, N/A; Fits 1956-1957 Pontiac Catalina, N/A; Fits 1978-1980 Pontiac Grand Am, N/A; Fits 1973-1975 Pontiac Grand Am, N/A; Fits 1962-1980 Pontiac Grand Prix, N/A; Fits 1979 Oldsmobile Delta 88, N/A; Fits 1975 Oldsmobile Delta 88, N/A; Fits 1977 Buick Skylark, N/A; Fits 1967-1968 Buick Skylark, N/A; Fits 1975 Oldsmobile 98, N/A; Fits 1975 Oldsmobile Custom Cruiser, N/A; Fits 1964-1973 Pontiac GTO, N/A; Fits 1963-1970 Pontiac Tempest, N/A; Fits 1961 Pontiac Tempest, N/A; Fits 1969 Pontiac Tempest, N/A; Fits 1968 Pontiac LeMans, N/A; Fits 1966 Pontiac GTO, N/A.

Quality Assurance

Dorman designs this replacement part to match original part fit and function for the listed vehicles. The steel construction and application-specific dimensions support consistent service on classic Pontiac, Buick, and Oldsmobile engine builds.