ACDelco GM Original Equipment FC243 (12642516) Dexos 5W30 Engine Oil Filler Cap

Overview

Keep your GM engine’s oil system sealed with the ACDelco GM Original Equipment FC243 cap. This cap covers the oil filler opening with a robust seal, available as a GM-recommended replacement for your vehicle’s original component. The cap is designed to fit the GM OE specification for reliable fit, form, and function. When you swap in a GM OE part, you’re choosing consistency across components you rely on every time you start the engine.

Key benefits at a glance

• Creates a tight seal at the oil filler opening to help prevent leaks and spray of oil under heat and pressure.
• GM-recommended replacement, ensuring compatibility with your GM vehicle’s original equipment.
• Built to GM OE standards, delivering the quality, reliability, and durability you expect from GM Original Equipment.
• Precision-made for a proper fit and dependable performance in the crankcase environment.

Design details that matter

The FC243 cap is a simple, dependable cap with a rubber sealing ring. Its design works with both threaded and quarter-turn closures, reflecting a flexible approach to installation. The seal is engineered to resist exposure to engine oils, vibration, and routine temperature changes, helping to maintain a clean, sealed filler neck between services.

• Rubber sealing ring helps keep oil inside and external contaminants out.
• Manufactured to GM OE specification for accurate fit, form, and function.

Usage in daily driving and maintenance

During routine maintenance, replacing a worn filler cap can restore the integrity of the oil system, contributing to a neater engine bay and a more predictable oil-fill experience. The FC243 cap’s robust construction supports repeated removal and reinstallation without losing its seal.

• Real-life scenario: replacing a damaged cap after an oil change to restore proper sealing.
• Environment: designed to withstand common workshop dust, moisture, and temperature cycles found in typical garages and driveways.

Why choose GM Original Equipment from ACDelco

Opting for GM Original Equipment means choosing parts that align with your vehicle’s design intent. The FC243 cap mirrors GM's original reliability and durability, offering confidence that the replacement will perform as intended. This aligns with a broader maintenance approach that emphasizes compatibility, longevity, and a seamless fit with the engine’s oil system.

Installation and care tips

• Design supports both threaded and quarter-turn closures for flexible installation.
• To install, align the cap with the filler neck, engage the threads or perform a light quarter-turn, and snug securely—do not overtighten.
• Inspect the rubber seal periodically; replace if you notice cracking or wear to maintain a strong seal.