I had a new cambelt kit and waterpump put on my Mk 1 Mondeo last week by a friend-of-a-friend (professional mechanic, doing it in return for me fixing his PC).
After it's first long run (25 miles of A and B roads) I smelt a rubbery smell and when I looked the top jockey wheel had come off and was jammed between the engine mount and cambelt cover, and the aux belt had frayed to about 2/3 the width against it and sprayed rubber shavings around the engine bay.
I wangled the jockey wheel out and judged the belt had enough tension and strength to drive gently home again. Which was right...
Now.. he's going to fix it at his own expense. New belt at least, possibly a new jockey wheel but it looks fine to me still - the bolt threads are clean and unmangled, the jockey wheel is still smooth and round and runs well on its bearing.
Is he somebody I should avoid ever using again, or is it just 'one of those things'?
Would you be furious or accepting about this sort of thing?