I helped rebuild m62tu where chain broke while running. About 1/3 the valves bent but we bought the car for $950 and had a spare parts engine so took off both heads and harvested enough valves to make a working motor.

Look on realoem for part number on the head it will show what other models use it.

We were able to mix and match heads so we picked two of the four that looked the best but didn't need machining. Heads were not damaged from the bent valves.

I spun each valve in a drill to confirm which were still ok. Some slightly bent were hard to tell.

Oh I also used steel wool and scotch bright to clean each valve while spinning in the drill.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)