Dorman Autograde Brass Cup Expansion Plug 15/16 Inch with 0.380 Inch Height for Buick Oldsmobile Pontiac 565-016

Brass cup expansion plug 15/16 inch for 1959 to 1981 Buick Oldsmobile and Pontiac engines used to replace worn or leaking factory core plugs.

Built to meet the manufacturer's design intent for reliable service using quality brass materials engineered for dependable performance and a precise fit.

Key Features

• Constructed from durable brass for corrosion resistance
• Outer diameter measures 15/16 inch for accurate sizing
• Cup height is 0.380 inch to match original specifications
• Designed as a direct replacement for specified vehicle models
• Backed by over a century of automotive industry experience
• Validated through testing to ensure consistent quality

Benefits

• Restores engine sealing to prevent coolant or oil leaks
• Reduces the risk of repeat repairs with reliable materials
• Ensures smoother installation with OE form and fit
• Helps maintain proper engine operating temperatures
• Provides a cost-effective solution for engine maintenance
• Delivers long-lasting durability for daily driving demands

Application

This part is ideal for mechanics and DIY enthusiasts restoring classic Buick Oldsmobile or Pontiac vehicles requiring engine block plug replacement to fix leaks or during engine rebuilds.

Fitment Notes

• Compatible with select Buick models from 1977 to 1980 and 1975
• Compatible with select Oldsmobile models from 1975 and 1979
• Compatible with select Pontiac models from 1959 to 1981
• Verify specific engine application before purchase

Why Choose Dorman - Autograde?

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

What's in the Box

• 10 pieces of brass cup expansion plugs

Item Dimensions

• Package measures 3.2 inches by 2.4 inches by 1.5 inches
• Total package weight is 0.3 lbs