Well...I've been worried about my pulley since reading up on the vulcanisation issue back in 2016. Doing the serpentine belt kit pulleys etc at the mo and think...well I've got the front off shall I put a new crankshaft pulley or not??? I've read the nightmare stories and the not so bad ones of the pulley just failing as your getting home etc... bad would be it goes and damages something else..good would be I get some indication (wobble, vibrate sound etc) and then I put a new one in... I could still have 10k miles left with the current one and my mileage is only 3k odd per year so why change it early! Save the cash instead ♂️.. I know many have gone early 70-100k miles... B5nuts lasted 200k! Mine is an 08 plate 3.0 on 175k, still the original crank pulley tensioner and belt so it seems...funny thing is the tensioner and belt appear to be great condition but I'm changing them anyway. I've got a couple of pics... just need to shrink them first. Btw...I haven't noticed any noises with the crank pulley when running and I've given it a tug...it appears well in place..rubbery .. and not hard..