I've just been off the phone to my sister who has told me that the her Mitsubishi Shogun / Pajero blew up last week. She took it to an engine specialist who said the camshaft snapped

How can it just snap? She said it was driving fine when she parked it up, then when she went back and it just wouldn't start. Could a timing belt snap have caused this? They are saying it needs a new turbo as well cos there are traces of oil in it and quoting £4000 essentially for top end rebuild, turbo , water pump and a few other bits!! Sounds too much to me, I'm sure I could replace my BMW 4.0 V8 engine for less than that! Hers is a 2.8TD.

I've found a cheaper engine with turbo etc but its more of a risk I suppose as you don't know the condition of the engine. What if it happens to the replacement - unless it was caused by the cambelt snapping, I can't see a camshaft just snapping??