Friends, I am in a bit of concern. My linea is starting to emit thick black smoke upon hard acceleration. There is no loss in pickup. But a slight more clattering sound from the engine bay. I was in talks with the service station regarding this when i first noticed the change in sound(similar to a tappet sound). Recently me and my cousin had a drive in two vehicles. He was behind me and told that there is slight more smoke than usual. I thought of checking it as i was driving more sedately than usual. I idled the car and gave a quick kick of the gas till the RPM reached 4k. and i was very surprised to see THICK BLACK SMOKE from the exhaust. Wat could be the reason? Waiting for the expert's reply. --- Double Post Merged, Sep 23, 2014 --- Forgot to say. Car has only coverd 64000 kms.