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 stating that during a clutch job, it is advisable to replace several key components to ensure the longevity and proper functionality of the clutch system. The pressure plate, clutch disc, release bearing, and pilot bearing all experience wear over time and can affect performance if not replaced. When performing a thorough clutch replacement, it's standard practice to replace these parts together since they are all integral to the clutch operation. Doing so helps prevent future issues and ensures the system works efficiently.

Technician B's comment addresses a serious health concern related to occupational safety. Breathing in dust from a worn pressure plate can indeed pose health risks, including respiratory issues, and being exposed to certain materials in brake or clutch components could potentially lead to greater health risks, including lung disease.

Both technicians provide valid information relevant to their fields: one concerning proper mechanical practices and the other highlighting the health concerns related to exposure to materials that can be hazardous. This convergence of knowledge reinforces the importance of both technical and safety considerations in automotive maintenance.