Neat shaft and sprocket.
FUNCTIONS:
1. Controls the opening and closing of the engine intake and exhaust valves.
2. Synchronizes valve timing with crankshaft rotation for proper engine operation.
3. Regulates air-fuel intake and exhaust gas release.
4. Supports efficient combustion, engine performance, and fuel economy.
5. Maintains smooth engine operation and power delivery.
WHY YOU MUST REPLACE IT:
When it develops worn cam lobes, bearing damage, excessive wear, or timing-related faults, leading to poor valve operation, engine misfire, power loss, rough idling, and reduced engine performance.