Recently I have Purchased a Xli 2008, 127k on ODO meter (GOD Knows well). After some days of running I have noticed a very little bluish smoke coming from exhaust on cold start. After 3,4 seconds it disappear and there is some Kr kr kr….sound from engine. Mechanic told me that this sound is of cam shaft but I didn’t believe him.
Can someone tell me the reason of smoke and sound?
Regards