Timing Idler (Roller) - Shahin M16 Engine
This component is one of the essential and consumable parts of the car engine. It consists of a bearing and a plastic roller on which the timing belt rides. It is typically replaced during timing belt service and replacement. A malfunction in this component can cause severe damage to the engine, including timing belt rupture and ultimately bending the valves. A failure of the roller at low mileage can be caused by dirt, water ingress, or motor oil leakage into the timing belt housing. The first sign of roller failure is a noise in cold weather. It is recommended to purchase the full timing kit products for a complete replacement.