thank you all, but my mechanic seems like he is in hurry and did not check the flywheel, now my clutch is not smooth, and there is a horrible sound when i engage the clutch in first and second gear more sound in second gear, like DUZZZ, sometime i get shocked like something smashed with body of the car. but if i extremely slowly engage the clutch then this sound is minimized. also a jerk is felt in second gear.