What safety measure should be taken when performing engine maintenance?

When performing engine maintenance, ensuring that the engine is off and cool before servicing is a critical safety measure. This is essential because a running or hot engine can pose numerous hazards, including the risk of burns from hot components or potential exposure to moving parts. Working on a cool engine minimizes the risk of injuries caused by hot surfaces or accidental contact with moving components.

Additionally, it is important to understand that working on a cool engine allows for a more thorough inspection and maintenance process, as the technician can handle parts safely without the worry of heat affecting their ability to safely and effectively perform tasks. Although wearing gloves, using a jack, and working during daylight can all contribute to various aspects of safety, they do not specifically address the immediate risks associated with temperature and engine operation during maintenance tasks.