Close off a leaking or missing engine plug with the Dorman expansion plug 555-007, a steel cup-type plug from the Dorman – Autograde line designed to match the original part’s fit and function. It fits many vehicles, among them the 1975-1983 Ford F-150 (L6-4.9L and V8-5.0L), 1996-2005 Ford Mustang (all engines) and 1975-1983 Ford F-250 (L6-4.9L). See the Buyer’s Guide tab for the full list.
Dorman catalogs this part as both an engine core plug and a rocker arm shaft end plug. The steel cup is driven into its opening, where it expands to form a seal.
- Direct replacement: built to fit like the factory plug on the listed applications when the original has gone missing or fatigued and failed.
- Steel cup design: a cup-type expansion plug made of steel, sized at 13.70 mm, with a 0.534-0.547 in diameter range and a listed height of 0.180.
- Quality construction: made from quality materials for reliable performance and long service life.
- Expert backing: supported by Dorman’s team of product experts in the United States and more than a century of automotive experience.
This part may need replacing if you see fluid seeping from around the plug or a rusted plug face, or if the plug has loosened or fallen out. It is sold individually, and the package contains one expansion plug. Country of origin: China.
Interchange: EPC-97
EPC97 · EAA6572 · F1AZ6026A · 1237691
