Steve Choi

Thanks for your reply. I think this noise doesn't come from mission area because when I put the gear on 'N' and accel pedal it also happen. I will check the cooling system. Would you let me know how get rid of air in the cooling system? Should I change all coolant?

Hi guys. My IS200 have noise totally same as this clip http://youtu.be/DlUssxXvBk8 I've searched solution via googling but I assume this problem may cause coolant air problem. because I broke radiator cap few days ago when I check coolant and after then it has started to make noise. What I really concern is it sounds like metal cracking. Therefore, I'm afraid it effect to engine condition. In addition, My IS200 is 2002 model.(166,600 km) Thank you for your help.