You sure about that broken timing chain? Is the engine opened and you can see it?
Also, you should write a thread in the general forum, not here.
Give as many details as you can about the incidents surrounding this diagnosis...miles on car, etc.
Debut Radio Show Tues, May 3, 1 p.m. on Hamiltonradio.net The Mechanical Animals
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A recent set--NSFW audio: https://youtu.be/_dcxcZfD6dg
Mangofy your E46!