回复：Cool. What 's mileage...the old TB... -pics inside (图)

Thanks. It was at 90k. The TB life time is dependent on the conditions inside TB chamber. Any coolant/oil leak or bad tensioner(s) can damage TB in few months. My car's old TB looked very clean and no crack. It could last for 30k more miles. (A complete coolant flash performed at 60k, DIY. So I haven't changed water pump at this time). But driving-B and steering-B had cracks (notice the inside turned out in the picture).