Ticking from the Hdi engine

Post by **c.morewood** » 30 Mar 2006, 15:31

I was working on the car the other day with the engine idling. I noticed when cold theres a rather loud ticking sound fron the offside wheel well, obviously coming from the engine.. It doesn't seem to be quite as loud in side the engine bay.
I hadn't really noticed the sound before ( maybe I had, but it didn't seem that loud) the sound is still there when the engine is warm, just not as loud.
Does anyone have any idea what this is? and should I be worried?
Chris

Post by **RichardW** » 30 Mar 2006, 15:43

It'll be the crankshaft pullety starting to disintegrate. If you look at it you may find it covered in rusty coloured dust, or if it's bad it may have chucked some meal shards about. it's bad, beacause if it lets go completely it can pull the cambelt off

Changing it is pretty easy though, but a new one costs about £100.

BonceChops · Post by **BonceChops** » 30 Mar 2006, 16:41

Are these not the same as any older engines?
I have heard these fail before, any idea why they do? It's not something I have heard failing on other engines before.

icedillon · Post by **icedillon** » 30 Mar 2006, 20:06

I think its just down to the amount of torque the engine produces, especially at low revs, a semi rubber pulley like that WILL EVENTUALLY GIVE WAY!

Kowalski · Post by **Kowalski** » 30 Mar 2006, 20:42

icedillon wrote:I think its just down to the amount of torque the engine produces, especially at low revs, a semi rubber pulley like that WILL EVENTUALLY GIVE WAY!

The pulley drives the auxiliary drive belt which drives the alternator, hydraulic pump and air conditioning pump. It doesn't actually get exposed to the full torque of the engine, the belt would snap long before the pulley failed.

The pulley hub and the pulley outer are separated by what could best be described as a tyre of rubber, that they're bonded to. Its the bonding that fails, then the rubber wears and if you leave it long enough they do come apart.

Post by **c.morewood** » 08 Apr 2006, 09:43

Thanks for the advice guys. I got a new pulley fitted on Wed £100 from GSF plus £25 fiting. what a difference.. especially on the early morning starts.. boy will my neighbours be happy !!
Chris

JohnD · Post by **JohnD** » 08 Apr 2006, 12:15

kowalski wrote:The pulley drives the auxiliary drive belt which drives the alternator, hydraulic pump and air conditioning pump. .

But bottom pulleys always have done. Why do PSA use a £100 pulley that has a limited life? Just curious!

joelataxi · Post by **joelataxi** » 09 Apr 2006, 17:36

i've run quite a few hdi's and the "sandwiched" pulleys all seem go between 90 - 100k

Also had to replace an alternator on a 110 hdi peugeot 406, now thats an expensive part, around £380 new, they say it's got some sort of a clutch built in, although this sounded to me the same idea as the rubber sandwiched bottom pulley, to take the "whip" out of the auxilary belt.
Not sure how valid that is, you would have thought the tensioner and pulley would have done that.

Kowalski · Post by **Kowalski** » 09 Apr 2006, 20:19

JohnD wrote:But bottom pulleys always have done. Why do PSA use a £100 pulley that has a limited life? Just curious!

The bottom pulley isn't just a bottom pulley, its a "harmonic damper". From what I've read, these things damp all sorts of vibrations that go through the crank, their obvious effect is to cut down on noise but they also make the engine last longer too. I suspect that when they re-engineered the XUD to make it into the HDI, the pulley got re-engineered too, or perhaps it was changed to be cheaper, in any case they didn't get the engineering of it quite right. Some of the HDIs have "dual mass" flywheels. This is the same sort of thing, except that its done with flywheel, the PSA dual mass flywheels don't last as well as single mass one either.

Post by **Peter.N.** » 09 Apr 2006, 20:50

I had the pulley disintegrate on my last XM but the only damage it did was to rob me of my auxilluary drives, which meant loss of hydraulic pressure, and that was at about 250k!. If its the same as the XUD pulley I dont see why failure should affect the cam belt as the inner part with the sprocket should remain firmly on the crankshaft.....unless of course the outer part goes through the cover on its way. Or is the HDI different?

AtitudeJim · Post by **AtitudeJim** » 10 Apr 2006, 06:30

i got the same problem my hdi is 75000 miles and it has never been replaced, and this last 3 weeks does a ticking coming from engine from the pulley area, so i also think it might be the same problem since the engine is the 2.0 hdi, ive seen on the ebay brand new crankshaft pulleys for 2.0 hdi citro/pug for 55.75 + max 10 pound postage.... so 70 pound max for it instead the 100/120 on the dealer. About the fitting, how much would a garage ask for fitting it?

cheers

joelataxi · Post by **joelataxi** » 12 Apr 2006, 22:31

Peter.N. wrote:I had the pulley disintegrate on my last XM but the only damage it did was to rob me of my auxilluary drives, which meant loss of hydraulic pressure, and that was at about 250k!. If its the same as the XUD pulley I dont see why failure should affect the cam belt as the inner part with the sprocket should remain firmly on the crankshaft.....unless of course the outer part goes through the cover on its way. Or is the HDI different?

the hdi pulley does seperate from the crank/cambelt as the XM, it's not a big job to change the pulley, just remove the plastic side cover from the inner wing and loosen the auxilary belt tensioner, less than half an hour for the job i guess.

edit is........... thats with an air wrench

joelataxi · Post by **joelataxi** » 12 Apr 2006, 22:36

AtitudeJim wrote:i got the same problem my hdi is 75000 miles and it has never been replaced, and this last 3 weeks does a ticking coming from engine from the pulley area, so i also think it might be the same problem since the engine is the 2.0 hdi, ive seen on the ebay brand new crankshaft pulleys for 2.0 hdi citro/pug for 55.75 + max 10 pound postage.... so 70 pound max for it instead the 100/120 on the dealer. About the fitting, how much would a garage ask for fitting it?

cheers

when they've gone you will see rust coming from the centre ring of the pulley, you can actually move the outer of the pulley with your hands too

AndersDK · Post by **AndersDK** » 12 Apr 2006, 23:31

Related discussion - not on the pulley though :
http://www.frenchcarforum.co.uk/forum/v ... hp?t=18714

Post by **DHallworth** » 13 Apr 2006, 00:51

i had the crank pulley go on my Hdi 306,

dropped it off at the peugeot dealer, everything done for £150 next day.

Peugeot do an uprated crank shaft pulley which is £120. Much better then the cheaper ones apparently.

I had the cambelt, water pump and crank pulley all done on mine at the same time from the dealer for £360 all in.

Crank Pulley - £120
Water Pump - £100

At the time i was busy with college work as it was the end of term, and i was doing all nighters to try and get course work in on time. So at the time it was £380 incredibly well spent.

Will definately do it myself next time it goes though.

David.