Dorman Autograde Rubber Engine Expansion Plug 3/4 Inch to 7/8 Inch for Buick Chevrolet 570-003

Rubber engine expansion plugs sized 3/4 inch to 7/8 inch for 1980 to 1992 Buick and Chevrolet vehicles used to replace worn or leaking factory core plugs.

Built to meet the manufacturer's design intent for reliable service, this expansion plug is constructed from quality rubber materials engineered to withstand engine operating conditions and provide a secure seal.

Key Features

• Material: High-quality rubber construction
• Size: 3/4 inch nominal with a range of 3/4 inch to 7/8 inch
• Design: Direct replacement for original equipment parts
• Quantity: Sold as a 5-piece pack
• Compatibility: Matches Pioneer part number EZ-75

Benefits

• Restores engine sealing to prevent coolant or oil leaks
• Eliminates the need for expensive dealer-only parts
• Ensures proper fit for specified Buick and Chevrolet models
• Reduces the risk of repeat repairs with durable materials
• Provides a cost-effective solution for engine maintenance
• Backed by over a century of automotive industry experience

Application

Ideal for mechanics and DIY enthusiasts repairing engine block leaks on older GM vehicles, specifically addressing failed core plugs in Buick and Chevrolet engines from the 1980s and early 1990s.

Fitment Notes

• Compatible with select 1980 to 1992 Buick models
• Compatible with select 1980 to 1992 Chevrolet models
• Verify engine block hole size before installation to ensure proper seal

Why Choose Dorman - Autograde?

• Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function
• Products are validated through testing to stand up to daily driving demands
• Backed by a team of product experts in the United States
• Focuses on durability and dependable performance to restore vehicle confidence

What's in the Box

• 5 Piece set of rubber expansion plugs

Item Dimensions

• Length: 3.2 inches
• Width: 2.4 inches
• Height: 1.5 inches
• Weight: 0.4 lbs