Sort of related but not on an Alfa engine. I was in my local specialists yesterday and they were rebuilding a 5-cylinder Fiat Coupe engine. In the box was the old cambelt, tensioners and water pump ... all looking remarkably similar to the TSpark bits I have sitting at home after my replacement.
But ... what a mess.
The water pump was badly worn (it wobbled!) and had leaked. The resulting water was being spread around the tensioners, etc. Results:
One pulley had a coating of rust formed along one edge and if you looked very carefully at the timing belt, was actually wearing that edge of the teeth away ...
The automatic adjustment on one of the "plastic" tensioners had seized completely.
The belt itself ... well let's just say he was lucky. It was cracked due to age. It didn't have a lot of life left.
In their experience they say that Alfa waterpumps are relatively good, but the Fiat version is a nightmare. And because it is all hidden behind covers, problems are not always obvious. This should have been due to coolent loss but from what I saw it had been happening for a long time.
I guess the morale of the tale is to keep a close eye on everything.
BTW: The engine was running when it came in. They are gasflowing the head and generally rebuilding/reconditioning it.