Aux belt area noise...
Hi all – because of another thread here, I just started the car with the bonnet open and noticed this chirping/cicada/frog noise possibly coming from the alternator. I hate noises coming from around this area, as I cannot tell precisely which component it's coming from.
https://www.youtube.com/watch?v=wSVUM8kEO-s Is this noise familiar to anybody? Many thanks in advance. |
Sounds bearing like but the clip isn't long.
You did your timing belt recently didn't you? and I'm sure I remember you doing the aux setup too..... Did you change the alternator pulley aswell? |
Yup, cheshired5, I did the cambelt and aux belt plus both tensioners and the aux idler pulley – but didn't touch the alternator. My S40 had the alternator clutch pulley go at about 160,000 and my previous V40 had it go at about 160,000 also, so I assumed that there'd still be plenty of life in it at 79,000 on this S60...
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Service life of the alternator pulley is 80k:(
Whip the belt off and turn the pulley clockwise. Then, insert a screwdriver in the fins of the alternator and turn the pulley clockwise again. If you feel roughness, resistance or it doesn't turn at all, it needs changing. |
Pound to a penny that's the alternator freewheel. Start from cold, your assistant that is, and watch the tensioner pulley. If it jumps about a bit and then settles down and starts cricketing it's a racing certainty the freewheel isn't.
When the motor shuts down the alternator rotor should keep spinning for about a second after the belt stops and as Cheshired5 said the pulley should be free in one direction and locked in the other. A quick wrist flick will do it with the belt off without having to lock anything. Unfortunately both these tests can be inconclusive as the pulley can enter a Schrodingeresque superposition of states where it is neither free nor not free. Hence the tendancy to flap the belt at cold start and then shake itself free. Comparison with a new unit shows it up pretty quick. As for life , like you I skipped the alt pulley at timing belt time, 92k but had to replace it at 96k. |
I had everything done in that area apart from the alternator pully.
Mine is the same chirping as that, like a cricket. It has been that way for two years and does not appear to be getting any worse. I hear it more in the winter. To change it, I have to get some sort of pully tool?? and then the pully itself (Genuine £75, non volvo £30) Does anyone in the north wet have the tool and fancy doing this? I don't really want to pay an hours labour for something that takes 5 minutes? + the purchase of the tool I will use once. |
Funny you guys should mention this, mine started making a noise on Sunday in the cold.
DDN |
Mines been doing this for a few months too. Sound like similar symptoms: slight chirping for first minute or so and some vibration of the belt over the tensioner and then it runs smoothly. I've seen a few references to changing the alternator freewheel on the forum. Can anyone point me to a recommended supplier and a numpty-proof guide to replacing it? Unfortunately my favourite indy garage has just closed down so I'm gonna have to get the spanners out a bit more often from now on. Many thanks.
BTW: the mileage is 215,000 and freewheel has not been changed in the last 100,000 miles of my ownership so it sounds like it's ready for replacement. |
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http://m.ebay.co.uk/itm/160768754378...ATCHING_ACTIVE and you're best to remove the alternator unless you find you can fit the tool in situ (which is nigh on impossible). My Volvo dealer is very local so I was able to remove my alternator and get a lift and the service department fitted the new pulley to the loose alternator as part of the £75 price. I had to ask very nicely for this.:thumbs_up: If doing it yourself, take your pick on the several clutch pulley removal vids on YouTube which show the tool in action. |
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Seized clutch pulley leading to snapped aux belt wrapping around timing belt is more common than timing belt failure on it's own. Don't risk your engine for £75.:thumbs_up: |
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