Mine broke at 68900 miles. Recently read an interesting article on the Honestjohn website that said u should do the belt, tensioner & waterpump every 36000 miles without fail on the D7F engine. I have just done a major overhaul on mine, 8 new valves, valve stem oil seals, cam oil seal, skimmed head, all new gaskets, belt & tensioner, waterpump, thermastat. It's now running fab!
I've found a supplier with unbeleivable prices - Headgasket set with bolts + 8 valves delivered to my door for £70. Waterpump, thermastat & tensioner for £52 to my front door! PM or email me for his details.