Dorman 555-102 Engine Expansion Plug
OE Quality 60-Day Returns
Dorman

Dorman 555-102 Engine Expansion Plug

Brand Dorman 555-102
Describe Type Cup Type
Material Steel
Maximum Diameter 0.728
Minimum Diameter 0.721
Package Contents Expansion Plug
Fits Ford, Mercury, Toyota, Chevrolet, and GMC · 100 vehicles

OE-style fit. Matches the original part's fit and function on specified vehicles.

Steel construction. Built from quality steel for reliable performance.

Cup type design. An engine expansion plug made for dependable sealing.

Cross-references 94000098, 9641101800 and D27Z6026G for the same application. See all 4.

$25.71Free shipping
In stock · usually ships same day before 1pm CST
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Engine Expansion Plug options

Dorman 555-102 Engine Core Plug

Dorman 555-102 is a steel cup-type engine expansion plug made to match the fit and function of the original plug on specified vehicles. It is built for direct replacement use in engine hardware applications where a precise seal is needed.

Key Features

  • Steel construction for engine service durability
  • Cup-type design for OE-style fitment
  • Matches original part dimensions for specified applications
  • Engine expansion plug for core plug replacement
  • Direct replacement for Ford, Mercury, Toyota, Chevrolet, and GMC applications

Detailed Description

This Dorman engine core plug is engineered around the original part’s fit and function, with a minimum diameter of 0.721 and a maximum diameter of 0.728. The steel cup-type design supports a secure seal in the engine block where a worn or damaged plug has failed. For buyers searching for an engine expansion plug for 2000-2004 Ford Focus, 1997-2002 Ford Escort, or 1991-1997 Toyota Previa, Dorman 555-102 provides a direct replacement option. It also cross-references EPC-204 for the same application.

What It Helps Address

  • Coolant leakage from a deteriorated engine core plug
  • Corrosion-related failure in the original expansion plug
  • Loss of sealing at the engine block opening
  • Replacement needs during engine repair or rebuild work
  • Fitment issues caused by an incorrect-size plug

Installation Notes and Tips

Verify the engine block opening size before installation and confirm the vehicle application against the fitment list. This part is listed for multiple 18 mm applications across Ford Escort, Mercury Tracer, Ford Probe, Toyota Van, Chevrolet S10, GMC S15, and related models. Clean the bore thoroughly and inspect the surrounding surface for corrosion or damage before installing the new plug.

Quality Assurance

Dorman designs this engine expansion plug to match original equipment fit and function on specified vehicles. The steel construction and OE-style dimensions support consistent service in engine hardware applications.

This part fits 100 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2004FordFocus2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2003FordFocus2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2002FordEscort2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2002FordFocus2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2001FordEscort2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2001FordFocus2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2000FordEscort2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
2000FordFocus2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1999FordEscort2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1999MercuryTracer2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1998FordEscort2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1998MercuryTracer2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1997FordEscort2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1997FordProbe2.0LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1997MercuryTracer2.0LL4N/A4 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1997ToyotaPrevia2.4LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1996FordEscort1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1996FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1996FordProbe2.0LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1996MercuryTracer1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1996MercuryTracer1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1996ToyotaPrevia2.4LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1995FordEscort1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1995FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1995FordProbe2.0LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1995MercuryTracer1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1995MercuryTracer1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1995ToyotaPrevia2.4LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1994FordEscort1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1994FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1994FordProbe2.0LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1994MercuryCapri1.6LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1994MercuryTracer1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1994MercuryTracer1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1994ToyotaPrevia2.4LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1993FordEscort1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1993FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1993FordFestiva1.3LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1993FordProbe2.0LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1993MercuryCapri1.6LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1993MercuryTracer1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1993MercuryTracer1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1993ToyotaPrevia2.4LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1992FordEscort1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1992FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1992FordFestiva1.3LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1992FordProbe2.2LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1992MercuryCapri1.6LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1992MercuryTracer1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1992MercuryTracer1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1992ToyotaPrevia2.4LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1991FordEscort1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1991FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1991FordFestiva1.3LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1991FordProbe2.2LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1991MercuryCapri1.6LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1991MercuryTracer1.8LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1991MercuryTracer1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1991ToyotaPrevia2.4LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1990FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1990FordFestiva1.3LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1990FordProbe2.2LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1989FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1989FordFestiva1.3LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1989FordProbe2.2LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1989MercuryTracer1.6LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1989ToyotaVan——N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1988FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1988FordFestiva1.3LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1988MercuryTracer1.6LL4N/A2 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1988ToyotaVan——N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1987FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1987MercuryLynx1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1987ToyotaVan——N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1986FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1986MercuryLynx1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1986ToyotaVan——N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1985ChevroletS102.2LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1985FordEscort1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1985FordEscort1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1985GMCS152.2LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1985MercuryLynx1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1985MercuryLynx1.9LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1985ToyotaVan——N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1984ChevroletS102.2LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1984ChevroletS10 Blazer2.2LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1984FordEscort1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1984GMCS152.2LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1984MercuryLynx1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1984ToyotaVan——N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1983ChevroletS102.2LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1983FordEscort1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1983MercuryLN71.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1983MercuryLynx1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1982ChevroletLUV2.2LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1982FordEscort1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1982MercuryLN71.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1982MercuryLynx1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1981FordEscort1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
1981MercuryLynx1.6LL4N/A1 Required; 18 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
940000989641101800D27Z6026GEPC-204