Audi Repair Questions? Ask a Mechanic for Answers ASAP
Ok and if you remove oil cap can you see the camshaft through hole ?
Ok does camshaft turn when engine is turning
Ok this would likely have caused damage to valves requiring cylinder head to be removed to repair .it looks like the engine has a timing chain fitted so its possible it broken .you will need to have this confirmed but from what you decribe it sounds as though this may be the case
It can happen at any time .how many miles have you covered ?