My linea is around 4 years old and has done 25000 kms till now. Today morning when I started my car I am hearing a distinct purring sound from the engine bay. It's loud enough to mistake it for a poorly maintained diesel car. Car was lying idle for the past one week and there wasn't any similar noise when I switched her off earlier. Although last day I did feel some weird noise coming up during driving it just came up twice for a few seconds and faded away. That time I thought it would be rain water that would have got into the belts. My first feeling was that the issue would be with the silencer as the sound is similar to that. But the sound is coming from some where near the engine itself. Also while switching off I am hearing a squeaking sound which was not there earlier. Car is due for service in November and so the engine oil level is low. There are no warnings on the MID. What could be the reason guys? She had been niggle free till now. I haven't taken my car to the new hyson fass yet so don't know anyone from their either.