Dorman 555-042 Engine Expansion Plug
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Dorman

Dorman 555-042 Engine Expansion Plug

Brand Dorman 555-042
Describe Type Cup Type
Material Steel
Maximum Diameter 1.984
Minimum Diameter 1.974
Package Contents Expansion Plug
Fits GMC and Chevrolet

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

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

Cup type design. A practical engine expansion plug for core plug service.

Cross-references 2326195 and EPS-58 for the same application. See all 2.

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Dorman 555-042 Engine Expansion Plug

Dorman 555-042 is a steel cup-type engine core plug built to match the fit and function of the original plug on specified vehicles. It is sized for a 1.974 to 1.984 in. diameter range, making it a direct replacement choice for engine block sealing service on applications that call for this dimension.

Key Features

  • Steel construction for engine block sealing applications
  • Cup-type design for OE-style fit and function
  • Maximum diameter: 1.984 in.
  • Minimum diameter: 1.974 in.
  • Designed as an engine expansion plug for specified vehicles
  • Part number 555-042 for catalog and service reference

Detailed Description

This engine core plug is engineered as a replacement for the original expansion plug used in select engine hardware applications. The steel body supports dependable sealing performance in the engine block, where a properly sized cup-type plug helps close off coolant passages and maintain the integrity of the cooling system. For buyers searching for Dorman 555-042, engine expansion plug, or steel cup-type core plug options, this part provides a straightforward OE-style service solution. Cross-reference part numbers include 2326195 and EPS-58 for the same application.

What It Helps Address

  • Coolant leakage from a worn or damaged core plug
  • Corrosion-related failure at the engine block plug opening
  • Improper sealing after engine service or rebuild work
  • Replacement needs for a missing or deteriorated expansion plug
  • Fitment-specific repair for engine hardware on select make/model applications

Installation Notes and Tips

Verify the plug diameter against the engine block bore before installation. Clean the sealing surface thoroughly and inspect the bore for pitting, distortion, or corrosion that could affect retention. Use standard engine service practices for cup-type core plugs and confirm proper seating after installation. For vehicle-specific searches, this part is commonly referenced for engine hardware service on select make/model applications, including Dorman 555-042 replacement searches for engine core plug service.

Quality Assurance

Dorman designs this expansion plug to match the original part’s fit and function on specified vehicles. The steel construction and OE-style cup design support consistent service replacement for engine sealing repairs.

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
2326195EPS-58