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[Iain]

My 3.2 has a slight squealing sound when idling, it's a rotating squeal like a pulley or the like. Anyone had this before, don't imagine it's serious just wondering

[sdwall]

Sounds like a belt slipping?

[Kevin Wood]

Yep, slipping belt or aux belt tensioner bearing would be my guess. Outside chance it's the air con compressor clutch. Could also be cam belt related, so worth getting to the bottom of it.

Remove the aux belt and give it a quick run to see if the noise is still there. While you're there check the tensioner pulley for play and roughness (and the rest of the ancillaries if it's OK).

[Iain]

The belt feels ok, so maybe a tensioner. I'll try it with the belt off and try it with the aircon on/off. Don't think it's cambelt related, it was done at one of the cambelt meets 2 years & 17k ago. It's Joff's estate I now own

[Mr.OmegaMan]

Hey bud does it sound like this ? If so it turned out to be the tensioner/pulley making the sound new parts fitted nice and quiet again  good luck 

http://youtu.be/1iGfvgOUiFA

[Iain]

No mate it's not like that, it is more like a squealing sound, seems to be more evident after I give it a wee 'boost'. Doesn't seem to be there constantly though which is weird. Anyway YouTube is a good idea, I'll film it when it next does it

[Mr.OmegaMan]

No mate it's not like that, it is more like a squealing sound, seems to be more evident after I give it a wee 'boost'. Doesn't seem to be there constantly though which is weird. Anyway YouTube is a good idea, I'll film it when it next does it

Aye helps other get a better idea what it could be 

[Doctor Gollum]

Yep mine does it, but only when cold.

Replaced;
Belt. New one made it worse.
Idler pulley for new
Pas pump for a known good one
Alternator for a recon one
...all as for separate issues but no change.

Ac works fine. Re gassed. Clutch spins freely. No excess drag when ac on.

Water pump is still the original. But no play on the bearing and it spins smoothly.

So... Does that leave a week tensioner perhaps?

[Iain]

I went out and filmed it there and it's not doing it but I did spray the belt last night with a conditioner spray to see if it was just a dry belt maybe,just don't think for a minute it would be that easy

[Iain]

Cant remember how to do this....

http://www.youtube.com/watch?v=gQ3Diwb3pzg&list=UUt8HiOyLVAw5qJHNu8rz6tg&index=1

[Iain]

  It worked!!

Here's the other with a bit of rev

http://www.youtube.com/watch?v=AER3XBcRM_c&list=UUt8HiOyLVAw5qJHNu8rz6tg

[Mr.OmegaMan]

Yep mine does it, but only when cold.

Replaced;
Belt. New one made it worse.
Idler pulley for new
Pas pump for a known good one
Alternator for a recon one
...all as for separate issues but no change.

Ac works fine. Re gassed. Clutch spins freely. No excess drag when ac on.

Water pump is still the original. But no play on the bearing and it spins smoothly.

So... Does that leave a week tensioner perhaps?

Aye new belt makes it worse which makes me wonder if the tensioner is working at its best  , I have a small issue when say returning home after a journey short as 8 miles there is a noise coming from the tensioner area but next day engine cold no noise just when the engine is hot after a run, not a loud noise just noticeable. Got a tensioner to fit when i have time hopefully that will cure it for good...

Omegas they are a pain in the behind pretty much constantly but we keep fixing them 

[Mr.OmegaMan]

It worked!!

Here's the other with a bit of rev

http://www.youtube.com/watch?v=AER3XBcRM_c&list=UUt8HiOyLVAw5qJHNu8rz6tg

Doesn't sound bad at all, Do hear a slight ticking/tapping sound Is the engine cold could be tappets filling up maybe 

Watched the video then it jumped to another with a little train 

[omega3000]

It worked!!

Here's the other with a bit of rev

http://www.youtube.com/watch?v=AER3XBcRM_c&list=UUt8HiOyLVAw5qJHNu8rz6tg

Doesn't sound bad at all, Do hear a slight ticking/tapping sound Is the engine cold could be tappets filling up maybe 

Watched the video then it jumped to another with a little train 

Dont tell lizzie or Mr DTM 

Most video picks up the tappy tap tappets , cant really hear a squeal though 

[Mr.OmegaMan]

It worked!!

Here's the other with a bit of rev

http://www.youtube.com/watch?v=AER3XBcRM_c&list=UUt8HiOyLVAw5qJHNu8rz6tg

Doesn't sound bad at all, Do hear a slight ticking/tapping sound Is the engine cold could be tappets filling up maybe 

Watched the video then it jumped to another with a little train 

Dont tell lizzie or Mr DTM 

Most video picks up the tappy tap tappets , cant really hear a squeal though 

True 

[Iain]

Yeah the engine was cold in the 1st 2 videos, no squeak present.

took it for a run and now its warm.....

http://www.youtube.com/watch?v=4W7FzfwQ3-8&list=UUt8HiOyLVAw5qJHNu8rz6tg&index=1

You can hear the squeal better towards the end

[dbdb]

That's more of a squeak than a squeal.  A slipping fanbelt is quite a distinctive squeal, a shriek almost, not like that and will happen particularly when you rev it.  If that is the case spraying some anti slip on it will stop the noise but carry a spare belt as the belt will go soon.   However your squeak sounds like a bearing noise.

[dbdb]

Obviously it is difficult to tell where it is coming from in a video but just in case put a stethoscope on the timing belt cover (or briefly run without the aux belt as suggested) and make sure it is not ththe timing belt, the most expensive problem if not fixed.  My timing belt made a lot of noise when it was going.  Not like that squeak though as I recall.

[dbug]

95% thats tensioner pulley bearing mate

As Kevin says, try it with belt off - but only for a very short while (that belt drives waterpump)
If its quiet then try removing and regreasing pulley.  I suspect though you will need a replacement.

[Iain]

I thought it was the tensioner to be honest. How hard is it to do the tensioner?

[dbug]

Get a new pulley only, not complete tensioner (~£25 on TC from memory)

10 minute job, drop aux belt off, undo 15mm bolt through pulley and remove pulley, fit new tighten bolt and refit belt - job done

[Iain]

Ach well easy and reasonable price so might as well do it

[symes]

reckon that it's your alternater-happens under load/hot-right - bearing going dry

[Mr.OmegaMan]

Could be many things that's what's so annoying 

Pulled the tensioner off today it was bone dry all greased up now and put a little more in the new pulley will go for a run again later.. Easier to take air filter box out to check/remove the tensioner   

Symes comment made me wish i'd checked mine also seen as i had pretty much everything off 

[dbug]

Could be many things that's what's so annoying 

Pulled the tensioner off today it was bone dry all greased up now and put a little more in the new pulley will go for a run again later.. Easier to take air filter box out to check/remove the tensioner   

Symes comment made me wish i'd checked mine also seen as i had pretty much everything off 

No need to remove air filter box to remove tensioner assembly

If pulley bearing dry just remove pulley - 1 bolt (15mm) - off in minutes

[symes]

in january mine would squeal-when I got to work-20+ drive and same when got home-Everybody suggested tensioner so fitted new one I got as a back up-and noise still there-when on a run-spent a whole day belt off checking all pulleys-it was my alternator so put my spare on-noise not come back---------yet

[Mr.OmegaMan]

Could be many things that's what's so annoying 

Pulled the tensioner off today it was bone dry all greased up now and put a little more in the new pulley will go for a run again later.. Easier to take air filter box out to check/remove the tensioner   

Symes comment made me wish i'd checked mine also seen as i had pretty much everything off 

No need to remove air filter box to remove tensioner assembly

If pulley bearing dry just remove pulley - 1 bolt (15mm) - off in minutes

Aye, If you want to get the 2 large long bolts out holding the tensioner with a little more ease yes IMO

[dbug]

Could be many things that's what's so annoying 

Pulled the tensioner off today it was bone dry all greased up now and put a little more in the new pulley will go for a run again later.. Easier to take air filter box out to check/remove the tensioner   

Symes comment made me wish i'd checked mine also seen as i had pretty much everything off 

No need to remove air filter box to remove tensioner assembly

If pulley bearing dry just remove pulley - 1 bolt (15mm) - off in minutes

Aye, If you want to get the 2 large long bolts out holding the tensioner with a little more ease yes IMO

Correct tools for the job - easy

[Iain]

Hmmm interesting thought on the alternator bearing,never heard one squeak before...a grinding yeah but not a squeak.

Im sure Irmscher Jim will have a spare alternator we could try

[Mr.OmegaMan]

Could be many things that's what's so annoying 

Pulled the tensioner off today it was bone dry all greased up now and put a little more in the new pulley will go for a run again later.. Easier to take air filter box out to check/remove the tensioner   

Symes comment made me wish i'd checked mine also seen as i had pretty much everything off 

No need to remove air filter box to remove tensioner assembly

If pulley bearing dry just remove pulley - 1 bolt (15mm) - off in minutes

Aye, If you want to get the 2 large long bolts out holding the tensioner with a little more ease yes IMO

Correct tools for the job - easy

Not everyone will though. Anyway's hope you get the noise sorted MonzaIain 

[Iain]

Cheers Mate,

I'll report back

[omega3000]

Could be many things that's what's so annoying 

Pulled the tensioner off today it was bone dry all greased up now and put a little more in the new pulley will go for a run again later.. Easier to take air filter box out to check/remove the tensioner   

Symes comment made me wish i'd checked mine also seen as i had pretty much everything off 

No need to remove air filter box to remove tensioner assembly

If pulley bearing dry just remove pulley - 1 bolt (15mm) - off in minutes

Take it apart and grease it anyway , you wouldnt want it to shatter at 70mph like mine did .. what a mess