Loud whining from crank pulley area

[Astroboy]

Hi all. I'm hoping you'll be able to help a new clio owner. I'm trying to fix an issue on our '07 1.4 and so far it's got me beat. I thought it was alternator bearings or possibly the tensioner but I've replaced both and the noise is the same. If I remove the belt and run the engine is sounds fine but as soon as the belt is on it sounds awful. The air con pump pulley feels fine, what else could it be? I've included a link to a vid of the noise

 

[Astroboy]

Nobody?

 

[STEVE.M]

Nobody?

A new belt is about £10, have you tried that?

 

[Astroboy]

A new belt is about £10, have you tried that?

Yep, that's a new belt, alternator and pulley tensioner already installed in that video

 

[STEVE.M]

Yep, that's a new belt, alternator and pulley tensioner already installed in that video

It may be an optical illusion, but tensioner pulley looks as if it is not aligned with belt.

 

[Astroboy]

I see what you mean but it's spot on. Whatever it is, it came on pretty quickly. I've only really got previous experience of minis and their crank pulleys can come apart. I was wondering if clio's are similar?

 

[STEVE.M]

I see what you mean but it's spot on. Whatever it is, it came on pretty quickly. I've only really got previous experience of minis and their crank pulleys can come apart. I was wondering if clio's are similar?

I`ve not heard of it, but they are listed new on eBay, so there must be a market for them.

@bloke

 

[bloke]

run it with the aux belt off but with how clear the noise is that will be a doddle to find.

 

[STEVE.M]

Run it with the aux belt off, but with how clear the noise is, that will be a doddle to find.

I understand what you meant to say now.

Keep up at the back, it does not make any noise with the aux belt removed.?

 

[Astroboy]

run it with the aux belt off but with how clear the noise is that will be a doddle to find.

I've run it with the belt off and there's no noise. The way I see it, it can only be the crank pulley or aircon pulley unless I'm missing something. I cant get the aircon clutch to engage as it needs a regass, but when disengaged it spins freely. There is some slight movement on the outer part of the crank pulley but not enough to make that racket (probably) [emoji848]

 

[Astroboy]

Oops..posts crossed over

 

[bloke]

didn't read only watched the clip. screwdriver and hold it to your ear, you can't not find it!!!!!!!

 

[STEVE.M]

didn't read only watched the clip. screwdriver and hold it to your ear, you can't not find it!!!!!!!

Can`t recommend that any more, ealth & safety.

 

[Astroboy]

didn't read only watched the clip. screwdriver and hold it to your ear, you can't not find it!!!!!!!

I've used a stethoscope on the alternator and the tensioner pulley. Both were noisy, thsts why they got replaced with new bits. Cant do that with the crank pulley though. Is there any sort of mechanism inside the crank pulley or is it just metal and rubber?

 

[Astroboy]

Checked out the aircon pulley again and its def ok. Going off the crank pulley part number it appears to be one of these

It looks like this on the reverse

Before I start pulling things apart.
Do I need to lock out the cams or anything before I rattle gun the centre bolt out? And probably most importantly what does the cog drive? It might be what its connected to that's bust

 

[Astroboy]

Also, am I right in assuming that the cambelt and water pump are ok if the engine runs quiet with no aux belt on. That seems reasonable to me

 

[jinjur]

Is water pump not on the aux side..........

*edit* sorry, it is on RS models......i see this is a 1.4 but there REALLY should be something obvious making that din.




says the person who is pissed of with squealing belts AND IS DOING NOTHING ABOUT IT!

 

[Astroboy]

I think the rubber has failed on the pulley and is allowing it to flex against the side cover (which is aluminium). Took a pic of the clearance and it's basically nil

 

[jinjur]

get her changed for all it will cost.............rubbish rubber insert poopy pulley

 

[Astroboy]

The pulley isnt keyed to the crank. Theres no reason why I cant rattle gun it off is there?

 

[jinjur]

stop.

its not keyed to the crank on a 172 either but taking it off without locking all the timing up will blow the timing out

on a 172 this is the only thing that holds the crank sprocket in time on the crank.

i dont know if that is the case with this engine but check first

 

[Astroboy]

stop.

its not keyed to the crank on a 172 either but taking it off without locking all the timing up will blow the timing out

on a 172 this is the only thing that holds the crank sprocket in time on the crank.

i dont know if that is the case with this engine but check first

Cheers thanks. I would have thought that the fixed point of reference would have been the bottom timing sprocket. Goes to show how much experience I have with these engines. I'm glad I asked [emoji3]

 

[Astroboy]

Are there any exploded diagrams for these engines? I've trawled the net and come up with nothing

 

[jinjur]

I don't know fella.....I am just suggesting exercise caution.

The guy son here will have the exact knowledge you need

 

[Astroboy]

The car has 57k on it so is due for a belt and water pump. I may as well do the lot 'while I'm in there'

 

[Soot1e]

Spray some WD40 on one pulley at a time whilst the engine is running, see if the noise disappears. Then try spraying on the aux belt. Should help diagnose.

 

[Astroboy]

Already tried the whole wd40 thing. By way of a quick update, it began throwing a STOP 'battery not charging' error yesterday. I think the inner and outer pulley sections have now well and truly come away from the rubber

 

[Astroboy]

Quick update......the problem is finally fixed. It was the bearings in the aircon pump! It felt fine on the car but off the car it was horrible and clearly the vibrations were transferring everywhere