On a recent trip to the cape i had a problem with the harmonic balancer not running true and starting to vibrate. ( when i reached the top on course.) I had it removed to notice the key in the keyway was broken. I have now been told there has been a few instances this has been happening after timming belts have been replaced :cry: . I had mine done 20000 kls ago. So if you get your timming belt done replace the key and the bolt while your there.