Mine has been doing that for the last 4k miles. It started when it reached 20k miles. I've been keeping an eye on
this thread, but there doesn't seem to be many people with this problem compared to the other problems. The thread gets buried quickly.
How easy is it to do this? I'm debating to bring my car to Servco because this only happens after I drive it for 1/2 hour. They usually take the car early in the morning and don't work on it until later. The noise would go away by then.