Hey there hope this message finds you well. I have an 06 corolla xrs which has the 2zz-ge engine. Recently I have been having some trouble diagnosing a sound that is a bit like metal clacking which occurs above 5k rpm. I have posted some sound clips in the Repair and Maintenance section and wondering if you had any insight into what it might be? Is it possible for a worn VVT sprocket to produce such a noise?