Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug 555-007
Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug 555-007 - view 2
Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug 555-007 - view 3
Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug 555-007 - view 4
Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug 555-007
Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug 555-007 - view 2
Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug 555-007 - view 3
Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug 555-007 - view 4

Engine Rocker Arm Shaft End Plug for 1975-1983 Ford F-150 & More - Dorman 555-007

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$14.99
MPN: 555-007
Item Package Code: EA
Part Has Core (Y/N): N
Item Package Quantity: 1
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Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug P/N:555-007
Dorman - Autograde Engine Core Plug,Engine Rocker Arm Shaft End Plug P/N:555-007
$14.99

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

This part cross-references / interchanges with the following part numbers:

EAA6572, F1AZ6026A, 1237691, EPC-97

Frequently Asked Questions

What does an engine expansion plug do?

It is a steel cup-type plug that is driven into an opening in the engine, where the cup expands to seal it. The 555-007 replaces an original plug that is leaking, corroded or missing.

What size is the Dorman 555-007?

Dorman lists it as a 13.70 mm steel cup plug with a diameter range of 0.534-0.547 in and a height of 0.180.

Which vehicles does the 555-007 fit?

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). Check the Buyer's Guide tab for your exact vehicle and engine.

What are the signs that an expansion plug may need replacing?

Common signs are fluid seeping or dripping from around the plug, rust on the plug face, or a plug that has loosened or fallen out. Diagnose the source of the leak before you replace any parts.

What comes in the box, and how is it installed?

The package contains one steel expansion plug. It is driven into the cleaned opening until it is seated. Follow the vehicle service information for the correct installation procedure.

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