What should be done to the cylinders to protect them from rust and corrosion when preparing the engine for long-time storage?

What should be done to the cylinders to protect them from rust and corrosion when preparing the engine for long-time storage?

• A. Spray a preservative oil inside the cylinders and replace the spark plugs with desiccant plugs.
• B. Drain all fluids and seal with plastic plugs.
• C. Leave spark plugs installed and apply rust inhibitors externally.
• D. Coat cylinder walls with motor oil only.

Answer: (A)

To prevent rust inside the cylinders during long-term storage, you want both a protective internal film and moisture removal. Spraying a preservative oil inside the cylinders coats the cylinder walls with oil that displaces moisture and slows corrosion, creating a protective barrier against rust. Replacing the spark plugs with desiccant plugs allows the combustion chamber to stay dry by absorbing residual moisture, reducing the chance of corrosion forming while idle. This combination addresses both lubrication and moisture control inside the cylinders. Other methods fall short: draining all fluids and sealing with plastic plugs removes lubrication and traps moisture; applying rust inhibitors only externally doesn’t protect the interior surfaces; coating with motor oil alone doesn’t remove moisture or provide a drying environment inside the cylinders.

To prevent rust inside the cylinders during long-term storage, you want both a protective internal film and moisture removal. Spraying a preservative oil inside the cylinders coats the cylinder walls with oil that displaces moisture and slows corrosion, creating a protective barrier against rust. Replacing the spark plugs with desiccant plugs allows the combustion chamber to stay dry by absorbing residual moisture, reducing the chance of corrosion forming while idle. This combination addresses both lubrication and moisture control inside the cylinders. Other methods fall short: draining all fluids and sealing with plastic plugs removes lubrication and traps moisture; applying rust inhibitors only externally doesn’t protect the interior surfaces; coating with motor oil alone doesn’t remove moisture or provide a drying environment inside the cylinders.