406 2.1D auxiliary belt problems

[buryboy]

The auxiliary belt on my 406 2.1D shredded last week and so I fitted a new one only to find that it has also shredded in the same way this morning (after about 100 miles)

I discovered this only because I popped the bonnet after the engine suddenly became really noisey. I've spoken to a mechanic mate who tells me that this is a common fault on this engine as the noise is diesel knock caused by the shredding belt coming into contact with the cam belt and upsetting the pump timing.

However, this sounds a bit far fetched to me as the cam belt is underneath all kinds of covers. However, I have no idea with this engine so has anyone ever come across anything similar happening before?

[504gld]

Doesnt sound right. The pump would physically have to jump a few teath of the cambelt, and if you cambelt is that slack expect a big bang anytime soon. If the belt is shedding something has got to be out of alignment in the belts path I would think, wether loose or fixxed wrong.

[buryboy]

Many thanks for the reply and those are my thoughts exactly.

I'm going to take what's left of the belt off and run the engine for a bit to see if the noise persists. If it doesn't, them my guess is a part of the damaged belt is catching as it's rotating.

The alignment idea also seems to be the obvious thing. I'll look into that in the morning.