WUT?
lol you serious?
joking aside
if physical timing goes bad on a TDI and most cars, you bend valves, possible piston damage, possible connecting rod damage, crank damage, and yes if its sever enough to dent the lifters, your cam can be damaged as well.
Regardless, your pulling the head, pull the oil pan as well and drop the connecting rod caps and inspect the crank and the bearings for abnormal wear, get a gauge block and measure the block height to the TDC of each piston. Pick up a set of calipers and measure each cam lobe and base.
OR you can just send the entire thing to Frank and have him rebuild it for you or buy one from him. Check out his CNC porting job he is doing now.
Good luck, your going to need it.
Once you pull the head, its not difficult to pull the pistons. leave the crank in place and just measure it!
again, good luck