Dorman 555-004 Engine Rocker Arm Shaft End Plug
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Dorman

Dorman 555-004 Engine Rocker Arm Shaft End Plug

Brand Dorman 555-004
Describe Type Cup Type
Material Steel
Maximum Diameter 0.456
Minimum Diameter 0.438
Package Contents Expansion Plug
Fits Ford, Isuzu, and Jeep · 17 vehicles

OE-style fit. Matches the original part's fit and function for straightforward replacement.

Steel construction. Built from quality material for reliable engine sealing performance.

Cup-type design. A practical expansion plug for engine hardware applications.

Cross-references 359899S, 8942030850 and EPC-108 for the same application. See all 3.

$25.71Free shipping
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Engine Rocker Arm Shaft End Plug for Ford, Isuzu, Jeep

Dorman 555-004 is a steel engine expansion plug built to match the fit and function of the original part on specified vehicles. It is engineered for reliable sealing performance in applications such as Ford Ranger, Isuzu I-Mark, Isuzu Pickup, and Jeep Wagoneer engine hardware service.

Key Features

  • Steel construction for durable engine sealing performance
  • Cup-type design with shallow cup profile
  • Matches original fit and function for specified applications
  • Maximum diameter: 0.456 in.; minimum diameter: 0.438 in.
  • Engine hardware replacement for rocker arm shaft end plug service

Detailed Description

This Dorman engine expansion plug is designed for direct replacement use in specified engine hardware applications. The steel cup-type design helps restore proper sealing where the original rocker arm shaft end plug has worn, corroded, or no longer seals correctly. Dorman 555-004 is listed for 2001 Ford Ranger, 1995-2000 Ford Ranger, 1981-1982 Isuzu I-Mark, 1981-1982 Isuzu Pickup, and 1963-1967 Jeep Wagoneer, making it a practical choice for restoration and repair work on these engines. This part cross-references EPC-108 for the same application.

What It Helps Fix

  • Oil seepage at the rocker arm shaft end plug area
  • Loss of sealing from a damaged or corroded original plug
  • Engine service issues caused by an incorrect plug size
  • Fitment problems during engine rebuild or repair work
  • Replacement needs on Ford Ranger, Isuzu Pickup, and Jeep Wagoneer engine hardware

Installation Notes and Tips

Verify the engine opening diameter before installation and compare it to the plug dimensions listed for this part. Clean the bore thoroughly so the steel cup-type plug seats evenly, and confirm the replacement matches the original style used on the vehicle. For best results, install using standard engine assembly practices and inspect for a uniform seal after service.

Quality Assurance

Dorman designs this expansion plug to match original part fit and function on specified vehicles and manufactures it from quality materials for dependable performance. Part number 555-004 is built for direct replacement use in the listed applications.

This part fits 17 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2001FordRanger2.3LL4N/ASteel; Shallow Cup Type; 1 Required; 0.453 In.; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2001FordRanger2.5LL4N/ASteel; Shallow Cup Type; 1 Required; 0.453 In.; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2000FordRanger2.5LL4N/ASteel; Shallow Cup Type; 1 Required; .453 In.; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1999FordRanger2.5LL4N/ASteel; Shallow Cup Type; 1 Required; .453 In.; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1998FordRanger2.5LL4N/ASteel; Shallow Cup Type; 1 Required; .453 In.; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1997FordRanger2.3LL4N/ASteel; Shallow Cup Type; 1 Required; .453 In.; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1996FordRanger2.3LL4N/ASteel; Shallow Cup Type; 1 Required; .453 In.; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1995FordRanger2.3LL4N/ASteel; Shallow Cup Type; 1 Required; .453 In.; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1982IsuzuI-Mark——N/A0.453 In. (11.32 mm) Steel Shallow Cup; 4 Required; Package Quantity: 10; Dorman - AutoGrade - Boxed
1982IsuzuPickup1.8LL4N/A0.453 In. (11.32 mm) Steel Shallow Cup; 4 Required; Package Quantity: 10; Dorman - AutoGrade - Boxed
1981IsuzuI-Mark——N/A0.453 In. (11.32 mm) Steel Shallow Cup; 4 Required; Package Quantity: 10; Dorman - AutoGrade - Boxed
1981IsuzuPickup1.8LL4N/A0.453 In. (11.32 mm) Steel Shallow Cup; 4 Required; Package Quantity: 10; Dorman - AutoGrade - Boxed
1967JeepWagoneer3.8LL6N/A0.453 In. (11.32 mm) Steel Shallow Cup; 1 Required; Dorman - AutoGrade - Boxed; Package Quantity: 10
1966JeepWagoneer3.8LL6N/A0.453 In. (11.32 mm) Steel Shallow Cup; 1 Required; Dorman - AutoGrade - Boxed; Package Quantity: 10
1965JeepWagoneer3.8LL6N/A0.453 In. (11.32 mm) Steel Shallow Cup; 1 Required; Dorman - AutoGrade - Boxed; Package Quantity: 10
1964JeepWagoneer3.8LL6N/A0.453 In. (11.32 mm) Steel Shallow Cup; 1 Required; Dorman - AutoGrade - Boxed; Package Quantity: 10
1963JeepWagoneer3.8LL6N/A0.453 In. (11.32 mm) Steel Shallow Cup; 1 Required; Dorman - AutoGrade - Boxed; Package Quantity: 10
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
359899S8942030850EPC-108