Strange noise Xantia 2.0 Hdi

rmunns · Unread post by **rmunns** » 21 Oct 2009, 21:39

After saying several times how happy I am with my car, which I bought in July, there now might be something lurking.

From cold, idling sounds like it always has.

But, when warm, there also seems to be a low-pitched growling noise on top of the normal sound.

It's as if when cold I'm listening to an orchestra playing but when hot there are extra double-basses as well.

Any ideas?

Just thinking again, next time I hear this I'll try to see any difference with clutch in / clutch out. Should have thought of this before writing...........

Unread post by **RichardW** » 21 Oct 2009, 22:39

I think mine does this too.... sounds like a light knocking sound when idling with the engine warm? No idea what it is, but it's done it since I got it (44k miles) and it's not got any worse, nor does it do it all the time - I have a feeling it happens more when there is more load on the alternator (eg cold dark wet days) - it could be the crank pulley I suppose, but there's no rattling when cold, so who knows

Citroenmad · Unread post by **Citroenmad** » 22 Oct 2009, 21:50

2.0Hdis can have problems with the bottom pulley on the cambelt. Is this where the sound if coming from or is it the engien itself?

Unread post by **RichardW** » 23 Oct 2009, 08:12

It could be the crank pulley, but these normally rattle from cold, which mine doesn't, and there's no evidence of failure (eg rust / dust on the pulley face which you normally get). I can't put my finger on the noise, and you can't really hear it outside the car / under the bonnet - but it is there enough to make you notice it. Sometimes!