Thought it was about time I joined. I have read many posts on this site and received much help as a result, many thanks one and all.
Twelve weeks ago my 528's water pump seized. Believe me when I say, you just don't want this to happen. The belt came off, wrapped itself around the fan, took out the rad and oil pipe to the power steering. If that wasn't bad enough, all of the coolant escaped and the engine overheated. Why alarms don't go off when this happens god only knows. A bulb goes out alarm goes off, engine losses coolant...silence. Anyway the garage thought that the head survived and fitted news parts (£700). Great for a week then the bottom hose blow off. Again no alarm and the engine overheated.
Head off, skimmed and refitted (£1300). Drove the car for a week then after a longer than normal run....you have it engine overheats, steam spuing from under the bonnet. At this point I'd had enough and decided to strip the engine down and do the job myself. Got to the head bolts and four were hand tight. This must have been the reason for the overheating and steam. Got all the bolts out to find the four loose ones had stripped threads. Others had partial stripping. The garage must have over-torqued the bolts.
So I am now waiting for a Time-Sert kit (p/n 1087) with 14 inserts so that I can put everything back together and finally get my cherished 528 back on the track
Moral of the story...always change your water-pump at around 80k, mine got to 100k and cost me two grand.