My timing belt snapped at 82k miles on my 03 plate 147 1.6. The RAC man says that even if I bought the cam and crank locking tools and replaced the head, the engine probably still wont start. Has anyone had any experience of this? Was only travelling at about 12mph coming off a roundabout into works car park. Am unsure if its just uneconomical to fix or whether I should give it a go. Thoughts please.