I've accidently floored the accelerator when I've started my 540i A.

There is no warning lights burning while the car idles,and it does not missfire while idling. I don't want to drive with the car as it might cause more damage to the engine. Could it be the timing chain's guide rails or maybe tensioner that took a beating? What about the Vanos? Could something have dislodged or broke? I've had a few leads to what it might be, but no one can tell for certain what could be wrong. All of them stated that I need to open up the front end of the engine to determine the problem. I've hoped to try and rectify the problem without taking anything apart.