Is200 Cracking Noise From Gear

[Steve Choi]

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.

[clifton 94]

hi if you think its coming from the gearbox it maybe the flywheel or clutch breaking up if its coming from behind the dash then you may have a air lock in the cooling system

[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?

[clifton 94]

to get the air from the system is easy just remove the rad cap and run the car up to temp and top up rad as any air will expel from the open rad then just turn off engine and let it cool down and top up rad and expansion tank once done take car for test drive and check for any leaks

[is153]

Ive had 5 cars with a dmf and thay have all been made funny noises .