What should be done if the air filter is found to be dirty?

The appropriate action when a dirty air filter is discovered is to clean or replace it according to the manufacturer's recommendations. An air filter plays a crucial role in ensuring that the engine receives clean air for combustion, which is essential for optimal performance and efficiency. A dirty air filter can lead to reduced airflow, decreased engine performance, and increased fuel consumption.

Following the manufacturer's guidelines ensures that any cleaning or replacement is done correctly and safely, allowing the engine to function as intended. This approach also aids in maintaining the quality and longevity of the engine and its components.

Other methods, such as washing the filter with soap and water or covering it with a seal, may not adequately address the underlying issues associated with a dirty filter, potentially leading to decreased performance or engine problems. Leaving the filter dirty would compromise air quality and engine efficiency, highlighting the importance of proper maintenance.