Dorman 090-066 Engine Oil Drain Plug

Dorman 090-066 Engine Oil Drain Plug

Dorman 090-066 is a direct replacement engine oil drain plug for worn or damaged original equipment plugs. It is built to match the required thread pitch for a secure seal and reliable oil pan service on select applications, including Buick Skylark, Oldsmobile Cutlass Calais, and Pontiac Grand Am.

Key Features

• Direct replacement oil drain plug for engine oil pan service
• Steel construction with silver finish
• M12-1.75 metric coarse thread with 13 mm hex head
• Gasket included for sealing at installation
• Standard oil drain plug design with conventional drain method
• Non-magnetic design
• Fits select 1988-1991 Buick Skylark, Oldsmobile Cutlass Calais, and Pontiac Grand Am applications

Detailed Description

This Dorman 090-066 engine oil drain plug is made to replace a damaged or worn OE drain plug while maintaining the correct thread size and pitch for proper engagement. The M12-1.75 thread, 13 mm hex head, and included gasket support a dependable seal during routine oil changes. It is a metric, coarse-thread steel plug with a standard hex-drive design for conventional drain service. This part cross-references DN090-066 and 78-24 for the same application.

What It Helps Solve

• Stripped or worn drain plug threads
• Oil seepage at the drain plug sealing surface
• Damaged hex head that makes removal difficult
• Incorrect replacement plug size on select Buick Skylark, Oldsmobile Cutlass Calais, and Pontiac Grand Am models
• Routine maintenance replacement for a conventional engine oil drain plug

Installation Notes and Tips

• Verify the vehicle uses an M12 x 1.75 thread before installation.
• Use the 13 mm hex head for removal and tightening.
• Inspect the oil pan threads and sealing surface before installing the new plug.
• Replace the drain plug gasket during service to help maintain a proper seal.
• Confirm fitment for 1988-1991 Buick Skylark, 1988-1991 Oldsmobile Cutlass Calais, or 1988-1991 Pontiac Grand Am before ordering.

Quality Assurance

Dorman manufactures this replacement drain plug to match OE thread pitch and sealing requirements for the listed applications. The part number 090-066 is intended for direct replacement use on compatible vehicles and is backed by Dorman’s replacement-part engineering standards.