Two technicians are discussing exhaust check valves used in SAI systems. Technician A says that they are used to prevent the output from the SAI pump from entering the intake manifold. Technician B says the check valves are used to keep the exhaust from entering the AIR pump. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician B is correct. The check valves in Secondary Air Injection (SAI) systems are used to prevent exhaust gases from entering the AIR pump, protecting it from damage.

Two Technicians Are Discussing Exhaust Check Valves Used in SAI