Technician A says that there are at least four parts that should be replaced when doing a clutch job: pressure plate, disc, release bearing, and pilot bearing. Technician B mentions that breathing dust from a worn pressure plate can cause lung cancer. Which technician is correct?

Technician A is correct in identifying that a complete clutch replacement typically involves replacing the pressure plate, clutch disc, release bearing, and pilot bearing. This ensures that all components are new and function properly together, reducing the chance of future issues. When a clutch job is performed, the pressure plate and disc wear over time due to friction and should ideally be replaced together to ensure compatibility and optimal performance. Additionally, replacing the release bearing and pilot bearing helps to prevent future mechanical failures, as these components can also wear out and contribute to poor operation of the clutch.

Technician B is also correct regarding the health hazards associated with inhaling dust from a worn pressure plate. While it may not be as commonly discussed as other automotive safety issues, there is indeed research indicating that certain materials used in clutches can release harmful dust particles when they wear down. Prolonged exposure to such dust may lead to respiratory issues, including an increased risk for lung cancer. This highlights the importance of safety practices, such as using proper ventilation and personal protective equipment while working on or around clutch components.

Therefore, both technicians provide valid information within their respective contexts, confirming that both are correct regarding the clutch job and the associated health risks.