307 110 HDI grinding sound when cold

Hi,

My 307 SW HDI 110 has started making a strange grinding/rumbling sound
when cold. I noticed it when pulling out of a car park and I thought
there was a branch under the car or the plastic cover under the engine
had dropped off and was dragging. It sometimes makes the noise when
stationairy and out of gear also. It usually doesn't do it when the
car just started but withing 10-50secs. I've noticed turning the air
con on or lights can make it work. The sound only lasts for a short
while, no more than 1 minutes and doesn't occur again until the car is
started from cold.

Once I caught it making the noise I had time to open the bonnet. It
sounded like the noise was coming from the area around the belt
driving the alternator. I noticed when the noise was being made that
the tensioner on the belt moved around a lot more !

I popped the car into a peugeot garage to get the crankshaft pulley
checked as I'd heard that these can give way. They had a quick look
and said it looked find and the belt tension was fine. The engine
sounded fine when they looked because the car was warm.

Any idea's ?

 

Replace the belt tensioner which i think you will find that is the
problem..also replace the drive belt at the same time.

 

I would go for the pulley personally. Any signs of metal filings
around the cover adjacent to the pulley?

 

I had a grinding sound from my 406 HDI, it turned out to be the alternator
bearings destroying themselves.
New alternator and all was well again.
GGJ

 

Thanks for the idea's guys. I've had to drop the car into the garage
again. Last night on the motorway I could here a clicking like a relay
in the glovebox, it clicked every now and again very quickly on/
off(??) at the same time I noticed the front lights gave a flicker
like they were either being dipped or turned off for a fraction of a
second. It only seemed to do this about 70 and below that the clicking
stopped.

The grinding noise now only seems to happen when the car is moving in
gear or out and still only when cold.

I've asked the garage to check out both problems, they may be related.

As for the Pulley the first time I took it in they had a quick check
for metal fillings and didn't find any.

Puzzled

Hopefully they will spot something today when they start the car from
cold.

Thanks

Steve

 

if they start it from cold ?or get some kid that starts it and dont
listen for the noises

 

Yes well they tried it this afternoon and didn't hear anything so I'm
going over tomorrow morning to see if I can show them what the problem
is !

 

Typical went to the garage this morning to demo the problem and it
didn't do it, well hardly, not enough to really track it down, just
heard a few slight clicks and knocks which from under the bonnet
sounded like the alternator ... arrrggggg

Seems the be worse the colder it is, which makes me think is bearing
related.

 

they had the car in the garage overnight?

 

Yes because they wanted to run it from stone cold. There was a small
noise for a short time but nothing like the racket it sometimes makes.

 

It sounds like a alternator bearing, when it gets hot it will make a
very loud noise,getting ready to go BANG.remove the fan belt and start
the engine up to see if the noise has gone.if not it could be water
pump?
good luck finding it ..

 

Been offline for a bit, so I may be too late to answer this.
What year is the 307? They changed the crankshaft pulley early on (pre
52 reg), and the new type does not disintegrate, it is very similar to
the XUD type, you know the type I mean Chris????
Anyway, this type also has a different alternator pulley with some
sort of freewheel device built into it. I understand that this can
give up, and cause noise. This could also affect the drive to the
alternator, which in turn could cause relay issues.
The tensioners normally don't give a problem on this model.
Brian.

 

Yes after many times trying too get one,then getting one and finding
out it was the wrong one,but in the end i got one and replaced it with
out any problem ,(just got to do the fan belt up a little bit more as
it makes bit of noise first thing)well i hope it is the fan belt lol
lol