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Dorman 555-102 Engine Expansion PlugOE Quality 60-Day Returns
Part #: 555-102

Dorman 555-102 Engine Expansion Plug

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100 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ford, Mercury, Toyota, Chevrolet, and GMC, Focus, Escort, Tracer, Probe, Previa, Capri, Festiva, Van, EXP, Lynx, S10, S15, S10 Blazer, LN7, and LUV
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Not what you need? See all Engine Expansion Plug options

Reliable Engine Core Plug for Chevrolet, Ford, GMC, Mercury, and Toyota

The Dorman 555-102 engine core plug is designed to provide a secure seal for your vehicle's engine block. Crafted from durable steel, this cup-type expansion plug ensures a precise fit and reliable performance for various models including Chevrolet S10, Ford Escort, and Toyota Previa.

Key Features of the Dorman 555-102 Engine Core Plug

  • Constructed from high-quality steel for durability and corrosion resistance
  • Cup-type design for effective sealing in engine block openings
  • Maximum diameter of 0.728 inches and minimum diameter of 0.721 inches for a precise fit
  • Compatible with multiple makes and models such as Chevrolet S10 Blazer, Ford Focus, and GMC S15
  • Includes one expansion plug per package

Detailed Description of the Dorman 555-102 Engine Core Plug

This engine core plug from Dorman is engineered to replace worn or damaged expansion plugs in the engine blocks of select Chevrolet, Ford, GMC, Mercury, and Toyota vehicles. The steel construction offers strength and resistance to engine heat and fluids, while the cup-type design ensures a tight seal to prevent coolant or oil leaks. With diameters ranging from 0.721 to 0.728 inches, the plug fits securely in the engine block, maintaining engine integrity and performance.

Common Applications and Issues Addressed

  • Sealing engine block core holes to prevent coolant leaks
  • Replacing corroded or damaged expansion plugs in Chevrolet S10 and S10 Blazer engines
  • Restoring proper engine block sealing in Ford Escort and Focus models
  • Preventing oil leaks in GMC S15 and Mercury Lynx engines
  • Maintaining engine block integrity in Toyota Previa and Van vehicles

Installation Notes and Tips

  • Ensure the engine block core hole is clean and free of debris before installation
  • Use appropriate tools to press the plug evenly into place without damaging the cup-type edges
  • Verify the plug diameter matches the engine block specifications (0.721 to 0.728 inches)
  • Inspect surrounding areas for corrosion or damage that may require additional repair

Quality Assurance and Warranty Information

Dorman manufactures the 555-102 engine core plug to meet or exceed OEM standards for fit and function. The steel material and precise manufacturing process contribute to long-lasting performance. While specific warranty details may vary, Dorman typically offers coverage against defects in material and workmanship to ensure customer confidence in the product.

BrandDorman
Part Number555-102
Describe TypeCup Type
MaterialSteel
Maximum Diameter0.728
Minimum Diameter0.721
Package ContentsExpansion Plug

This part fits 100 vehicles. Search below:

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
1989ToyotaVanN/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
1988ToyotaVanN/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
1987ToyotaVanN/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
1986ToyotaVanN/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
1985ToyotaVanN/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
1984ToyotaVanN/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

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

940000989641101800D27Z6026GEPC-204

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.