Dorman

Dorman 570-008 Engine Timing Cover Plug

Brand Dorman 570-008
Describe Type Quick-seal®
Material Rubber
Package Contents 5 Expansion Plugs
Fits GMC and Pontiac · 4 vehicles

OE direct replacement. Matches the fit and function of the original part.

Rubber construction. Provides a flexible seal for reliable performance.

Quick-seal design. Helps make installation fast and straightforward.

Cross-references EZ-137 for the same application. See all 1.

$40.85Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $40.85
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Dorman 570-008 Engine Timing Cover Plug

Dorman 570-008 is a rubber engine expansion plug built to match the fit and function of the original part on specified vehicles. It is made for reliable sealing in the timing cover area and is a direct replacement choice for classic Pontiac applications.

Key Features

  • Rubber construction for a secure expansion seal
  • OE-style fit and function for specified engine applications
  • Quick-seal design for straightforward sealing performance
  • Engine timing cover plug for restoration and repair work
  • Cross-references Monroe Shocks & Struts EZ-137 for the same application

Detailed Description

This Dorman engine timing cover plug is engineered for vehicles that need a dependable rubber expansion plug in the timing cover area. The part number 570-008 is listed for 1957 Pontiac Bonneville and 1955-1957 Pontiac Catalina, making it a focused solution for classic Pontiac engine service. If you are sourcing a Dorman 570-008 replacement for a Pontiac Bonneville or Pontiac Catalina timing cover plug application, this part is built to match the original fit and function with quality materials.

For restorations and repairs where a sealing plug must seat correctly and maintain performance, Dorman 570-008 provides a practical OE-style option. It is also a useful search match for buyers looking for a 1957 Pontiac Bonneville engine timing cover plug or a 1955-1957 Pontiac Catalina rubber expansion plug.

What It Helps Solve

  • Sealing wear at the engine timing cover plug opening
  • Replacement of a hardened, cracked, or leaking rubber plug
  • Restoration of original-style sealing on classic Pontiac engines
  • Fitment issues caused by an incorrect diameter or poor seating plug
  • Service needs for 1957 Pontiac Bonneville and 1955-1957 Pontiac Catalina applications

Installation Notes and Tips

Verify the opening size before installation and confirm the plug matches the specified application range. Clean the sealing surface thoroughly so the rubber plug can seat evenly. For best results, compare the removed part to Dorman 570-008 before installation on Pontiac Bonneville or Pontiac Catalina engines.

Quality Assurance

Dorman states that this expansion plug is made from quality materials and engineered to match original part fit and function on specified vehicles. That design focus supports consistent sealing performance in the intended application.

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1957PontiacBonnevilleN/A1.375 In. - 1.50 In. (34 mm - 38 mm); Quick Seal Rubber; 1 Required; Sell Until Depleted; Package Quantity: 5; Dorman - AutoGrade - Boxed
1957PontiacCatalinaN/A1.375 In. - 1.50 In. (34 mm - 38 mm); Quick Seal Rubber; 1 Required; Sell Until Depleted; Package Quantity: 5; Dorman - AutoGrade - Boxed
1956PontiacCatalinaN/A1.375 In. - 1.50 In. (34 mm - 38 mm); Quick Seal Rubber; 1 Required; Sell Until Depleted; Package Quantity: 5; Dorman - AutoGrade - Boxed
1955PontiacCatalinaN/A1.375 In. - 1.50 In. (34 mm - 38 mm); Quick Seal Rubber; 1 Required; Sell Until Depleted; Package Quantity: 5; Dorman - AutoGrade - Boxed
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
EZ-137