Question

During a cylinder leakage test, what would be the cause of air escaping from the oil fill port?

a) Worn or weak piston rings
b) A burnt or poor sealing exhaust valve
c) A burnt or poor sealing intake valve
d) Cylinder liner cavitation

Answer 1

The cause of air escaping from the oil fill port during a cylinder leakage test would be a burnt or poor sealing intake valve.

Step-by-step explanation:

During a cylinder leakage test, if air is escaping from the oil fill port, the most likely cause would be a burnt or poor sealing intake valve (c). This is because the intake valve is responsible for allowing air into the cylinder during the intake stroke. If the valve is burnt or not sealing properly, air can escape into the oil fill port.