Dorman 565-025 Engine Timing Cover Plug
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Dorman

Dorman 565-025 Engine Timing Cover Plug

Brand Dorman 565-025
Describe Type Cup Type
Material Brass
Maximum Diameter 1.392
Minimum Diameter 1.382
Package Contents Expansion Plug
Fits GMC and Pontiac · 8 vehicles

OE-style fit. Matches the original part's fit and function for reliable performance.

Brass construction. Provides durable, dependable sealing in an engine expansion plug.

Cup type design. Engineered as a timing cover plug for a precise, secure fit.

Cross-references EPC-80-B for the same application. See all 1.

$50.74Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $50.74
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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 Timing Cover Plug options

Dorman 565-025 Engine Timing Cover Plug

Dorman 565-025 is a brass cup-type engine expansion plug made to match the fit and function of the original timing cover plug on specified vehicles. It is built for direct replacement use in classic Pontiac applications, including Pontiac Bonneville and Pontiac Catalina models.

  • Brass construction for corrosion resistance and stable sealing performance
  • Cup-type design for engine timing cover plug applications
  • Maximum diameter: 1.392 in.
  • Minimum diameter: 1.382 in.
  • Direct replacement for specified Pontiac timing cover plug applications

Application Details

Compatible With 1955-1957 Pontiac Catalina, N/A, and 1957 Pontiac Bonneville, N/A. This Dorman 565-025 engine timing cover plug is sized for the specified brass cup application and is intended to restore the original sealing point in the timing cover area. The part cross-references EPC-80-B for the same application.

What It Helps Address

  • Coolant or oil seepage at the timing cover plug location
  • Worn, corroded, or damaged original expansion plug surfaces
  • Poor sealing caused by incorrect plug diameter
  • Service replacement needs on classic Pontiac engine assemblies

Installation Notes

Verify the timing cover opening size before installation and confirm the cup-type brass plug matches the vehicle’s original specification. Clean the bore thoroughly so the sealing surface seats evenly, and inspect the surrounding timing cover for wear, pitting, or distortion before installing the replacement plug.

Quality Assurance

Dorman manufactures this engine expansion plug to match original part fit and function on the listed vehicles. The brass construction and specified diameter range support consistent replacement performance for Pontiac Bonneville and Pontiac Catalina timing cover service.

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1957PontiacBonnevilleN/A1.375" Brass Cup; 1 Required; Package Quantity: 10; Packaging Type: Box
1957PontiacBonnevilleN/A1 Required Engine Timing Cover Plug with 1.375 In. Brass Cup; Package Quantity: 10 in Boxed Packaging
1957PontiacCatalinaN/A1.375" Brass Cup; 1 Required; Package Quantity: 10; Packaging Type: Box
1957PontiacCatalinaN/A1 Required Engine Timing Cover Plug with 1.375 In. Brass Cup; Package Quantity: 10 in Boxed Packaging
1956PontiacCatalinaN/A1.375" Brass Cup; 1 Required; Package Quantity: 10; Packaging Type: Box
1956PontiacCatalinaN/A1 Required Engine Timing Cover Plug with 1.375 In. Brass Cup; Package Quantity: 10 in Boxed Packaging
1955PontiacCatalinaN/A1.375" Brass Cup; 1 Required; Package Quantity: 10; Packaging Type: Box
1955PontiacCatalinaN/A1 Required Engine Timing Cover Plug with 1.375 In. Brass Cup; Package Quantity: 10 in Boxed Packaging
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
EPC-80-B