Help!! Turbo whining/howl and power loss!!
Hi guys. In need of some help before the car goes into the garage. I have a 57 reg 520d lci that has just developed a problem. Cars been fine until now. Has done 80,000 miles and looked after pretty well. Came off the motorway earlier and heard a really loud whining noise followed by a loss in power. The whine sounds really high pitch and not whistle like, more like a cat stuck under the bonnet. It makes the noise when revved standing still and when driven too, the noise gets louder higher up the rev range. No smoking at all and no oil burning either.
Any idea what it is?? I can only think of boost pipes or turbo.