Seal an open engine bore with a snug, factory-style fit using the Dorman expansion plug, part number 555-030, a steel cup-type plug from the Dorman - Autograde line. It fits many vehicles, among them the 1999-2005 Chevrolet Silverado 1500, 1988-1999 Chevrolet C1500 and 1988-1999 Chevrolet K1500 (all engines). The listed applications use one plug; see the Buyer's Guide tab for the full list.
This engine expansion plug is cataloged as both an engine camshaft plug and an engine core plug. It is designed to match the original part's fit and function on the listed applications, so it is a dependable replacement when the factory plug is leaking, damaged or absent.
- Direct-fit replacement: built to install like the original plug on the listed applications.
- Steel cup design: a 1-5/8 in. cup-type expansion plug made of steel, with a diameter range of 1.63 to 1.643 in. and a listed height of 0.500.
- Quality construction: made from quality materials and engineered for reliable performance.
- Backed by experience: supported by Dorman's U.S.-based product experts and more than 100 years of automotive know-how.
The package contains one expansion plug. Country of origin: China.
Signs a plug may need replacing include seepage or staining around the plug, visible corrosion on the cup, or a plug that has loosened in its bore. Cup plugs are driven into the bore rather than bolted in. Follow the vehicle service information for bore preparation and installation.
Interchange: 260-186 · EPC-41 · EPC41-25
260186 · EPC41 · EPC4125 · 3144643 · 733598 · 31568 · 2121198 · 5203342 · 6033564 · J3144643 · 3826504 · 3826505 · 88891749 · 94673017 · 70128
This part cross-references / interchanges with the following part numbers:
3144643, 733598, 31568, 2121198, 5203342, 6033564, J3144643, 3826504, 3826505, 88891749, 94673017, 70128, 260-186, EPC-41, EPC41-25
