Dephaser pulley gone?

[LouisQ]

My engine is making a slight rattle/knock on idle but phases out as the revs climb. The noise could be decribed as a faint modern diesel sound?

Whats the score with these pulleys, do they just give up? as i really cant afford another belt change....

 

[clio_chris]

Standard with all clios i think mate, mine sounds like a diesel aswell, but if it does get increasingly louder then it possibly needs changing, i think its easier to do when doing the cambelt aswell iirc.

 

[Andyman]

Full cambelt and aux belt change if you need to replace it

 

[Cro]

Just make sure all the spark plugs are nice and tightened properly

 

[Gaz_]

Dephaser will be not eveident when cold (well on mine) then when up to temp will rattle like fook. I dont actually think there are any problems short term, never heard of a dephaser failure as such. Just sound worse than they are.

 

[vermeeruk]

Dephaser pulley needs replacing, and change cam belt and aux belt to, I,ve just had mine done.

 

[DrR]

Dephaser will be not eveident when cold (well on mine) then when up to temp will rattle like fook. I dont actually think there are any problems short term, never heard of a dephaser failure as such. Just sound worse than they are.

My 172 dephaser failed bigstyle!

 

[Gaz_]

According to Kev it wasnt the dephaser?

DrRollos broken pulley was the exhaust cam pulley not the DEPHASER

 

[DrR]

oh ok, i always thought it was that!!

 

[Gaz_]

I *think* the dephaser pully is the one at the front of the engine, and the exhaust pully is the rear one (makes sense to me as the mani is on the rear). Apparently yours sheared clean off!!!

 

[LouisQ]

Yes Dephaser is at the front. Just wondered on whether it will progressively get worse before its dangerous?

 

[172Ben]

I think it will get worse. But I wouldn't leave it to late to change it though.

 

[sideways danny]

My 172 dephaser failed bigstyle!

According to Kev it wasnt the dephaser?

oh ok, i always thought it was that!!

I must have corrected this about 20 times and STILL it gets said

 

[mini-valver]

How long ago were your belts done? If its not long ago, just throw a cambelt on it when you change the dephaser. No need to change any pulleys if they were done not long ago.

 

[Alex_X93]

Lucky my rattle at approx 3.5k was my alternator pulley/bearing. Could try dropping aux belt off to check alt first.

 

[LouisQ]

The knock is now very loud... It is coming from dephaser as far as I can tell, it only happens on idle but for some reason a slight amount of load on the steering wheel will elminate it?! This isn't due to revs dropping either...

Ideas?!

 

[Fred@BTM]

i took a dephaser apart a while ago, its not going to fall apart, if it is knocking don't worry too much about it

i'm still not 100% on why they make a noise, i'm putting it down to lack of oil changes, anyone else had one apart?

 

[davebem]

Ive heard it said a few times that it tends to happen on cars with non frequent oil changes. Its a common thing on the 1.6 (k4m) engine aswel. The knocking apparantly is caused by the inner section of the dephaser wearing, and then shifting back and forth against the resistance of the camshaft and valve springs.

 

[LouisQ]

It's a disturbingly loud knock which is the reason for my concern. Figured if the dephaser gives up so does the cam belt... I clearly don't understand this pulley as I thought it was external device thus making oil changes irrelevant?

How much are they does anyone know?

 

[LouisQ]

And can anyone explain the link to my steering? My wheels are very jumpy when manouvering and the knocking can be eliminated with certain steering wheel movements?the sound certainly sounds like it's NOT coming from the pump....

 

[davebem]

Are you turning the steering on idle?? When turning I think the ecu controls the revs via a pressure sensor, I think if the pump needs more pressure the revs raise to turn the pump quicker, turn the wheel and see if it affects the revs. Is the engine knocking definitely coming from the top of the engine??

 

[LouisQ]

It certainly sounds like it's coming from the top pulley. The revs don't seem to be the cause of it stopping. Very odd

 

[Andyman]

It's a disturbingly loud knock which is the reason for my concern. Figured if the dephaser gives up so does the cam belt... I clearly don't understand this pulley as I thought it was external device thus making oil changes irrelevant?

How much are they does anyone know?

IIRC theres only be one case reported on here of a dephaser giving up to the point of screwing up the engine and that was basically a pulley collapsing which i dont believe was connected to the dephaser noise thing anyway.

Chances are you'd end up changing the dephaser long before it would give up, if it ever would, as the noise would do your head in and sounds worse than it actually is.

 

[LouisQ]

Can anyone explain the oil change connection? Id like to learn more about the pulley before I set about changing it.

 

[Fred@BTM]

i can't actually see how one could collapse, its verging on the impossible TBH!

i'll take pics of a disassembled one so you can see for yourself

 

[caister]

i can't actually see how one could collapse, its verging on the impossible TBH!

i'll take pics of a disassembled one so you can see for yourself

From what we saw when you had it apart theres no way its going to fail

 

[Andyman]

If its oil starve that causes the noise rather than replacing could it not be lubed up or is it actually something within which wears?

 

[LouisQ]

Ok it was a loose powersteering pulley.... Sorry folks!

 

[caister]

If its oil starve that causes the noise rather than replacing could it not be lubed up or is it actually something within which wears?

Needs freds pictures really then it'll be reasonably easy to see how it works

 

[Andyman]

Heres the rear side of the pulley to keep you guessing as to whats inside lol

 

[jooliona]

put my car in to get belts done yest at local stealers, they've said whoever did the job last time bodged it (unlikely as it was Carltons in Exmouth), something about a cross-threaded bolt and leaking dephaser (?!) and now they have to keep it x days to get parts which are on back order and it's going to cost ME a further £292. And they can't even give me a courtesy car

 

[Fred@BTM]

you went to a dealer? are you mad?

 

[Silent_Scone]

Bloke I know in parts in our local dealer seemed to think it was down to irregular oil changes. My original one was on 86k and sounded spot on

 

[Addicted]

put my car in to get belts done yest at local stealers, they've said whoever did the job last time bodged it (unlikely as it was Carltons in Exmouth), something about a cross-threaded bolt and leaking dephaser (?!) and now they have to keep it x days to get parts which are on back order and it's going to cost ME a further £292. And they can't even give me a courtesy car

you're crazy

so what's the totalling its costing you at the dealers? 1.5k?