V40: - Engine Noise from belt pulley area.

steveamills · Mar 15th, 2011, 16:46

A metalic grating sound that increases with engine revs has suddenly started up on my V40. Funny thing is, when I switch on the aircon it disappears!! Have had a good 'look' but can't see anything out of the ordinary. Nothing chafing or rubbing, no loose belts etc. Anyone any ideas?? Driving me blind!

littlehomer · Mar 15th, 2011, 17:05

Hi there,

Which engine is it?

When I had this problem, it was the alternator pulley.

They have a clutch in that ceases.

Does the aircon pulleys have the same? If so, if turning the aircon on stops it, I'd suspect that.

Many Thanks,

Daniel.

steveamills · Mar 15th, 2011, 17:54

Cheers Daniel, it's the 1.9 diesel. Does it cost much?

scottishvolvo · Mar 15th, 2011, 18:02

Tensioner pulley on its way out?

Volvon · Mar 15th, 2011, 19:43

I had the same thing around Christmas, it disappeared then came back a couple weeks ago The auxiliary/alternator belt tensioner seized shortly after which also murdered my battery.

I couldn't find a new tensioner anywhere here so I put a used one in out of 50k mileage car 40€, New Belt 20€ and new battery 70€.

littlehomer · Mar 16th, 2011, 09:42

Hey up,

I've got a fully working tensioner from that engine you are welcome to if it turns out to be that seized.

I paid £30 for the alternator pulley from GSF.

Your issue is getting the old one off. You'll need the right tools.

There's a thread about me changing it on here somewhere.

It's almost cheaper to get a refurbished alternator in exchange for yours and change the whole unit.

Or, for not much more you can get a new alternator as they normally come with pulley attached.

Basically, remove the aux belt and there's a test you can do by spinning the alternator pulley by hand, stopping it and seeing if the alternator carries on to a stop or just stops with you stopping the pulley.

I'd have a dig locally for an alternator refurbishing place. There's one here in Worcester for example.

Cheers,

Daniel.

Mar 15th, 2011, 16:46	#1
steveamills New Member Last Online: Mar 15th, 2011 19:10 Join Date: Dec 2008 Location: Bridgend	Engine Noise from belt pulley area. A metalic grating sound that increases with engine revs has suddenly started up on my V40. Funny thing is, when I switch on the aircon it disappears!! Have had a good 'look' but can't see anything out of the ordinary. Nothing chafing or rubbing, no loose belts etc. Anyone any ideas?? Driving me blind!

Mar 15th, 2011, 18:02	#4
scottishvolvo Premier Member Last Online: Nov 17th, 2023 00:15 Join Date: Dec 2004 Location: Glasgow	Tensioner pulley on its way out? __________________ Chris '98 S40 2.0T..Gone. 2000 S40 2.0 SE Auto and loving it. 2014 V40 Cross Country Please consider registering with the Anthony Nolan Trust, you could save a life.

Mar 15th, 2011, 19:43	#5
Volvon Master Member Last Online: Nov 13th, 2020 06:29 Join Date: Mar 2010 Location: The Land of Ice & Snow	I had the same thing around Christmas, it disappeared then came back a couple weeks ago The auxiliary/alternator belt tensioner seized shortly after which also murdered my battery. I couldn't find a new tensioner anywhere here so I put a used one in out of 50k mileage car 40€, New Belt 20€ and new battery 70€. __________________ 1999 V40 1.9D (D4192T2 engine) Current mileage: 211,000 miles Average MPG: 54.4

Mar 15th, 2011, 17:05	#2
littlehomer Master Member Last Online: Jul 15th, 2013 11:29 Join Date: Mar 2010 Location: Malvern View Photos By: littlehomer	Hi there, Which engine is it? When I had this problem, it was the alternator pulley. They have a clutch in that ceases. Does the aircon pulleys have the same? If so, if turning the aircon on stops it, I'd suspect that. Many Thanks, Daniel.

Mar 15th, 2011, 17:54	#3
steveamills New Member Last Online: Mar 15th, 2011 19:10 Join Date: Dec 2008 Location: Bridgend	Cheers Daniel, it's the 1.9 diesel. Does it cost much?

Mar 16th, 2011, 09:42	#6
littlehomer Master Member Last Online: Jul 15th, 2013 11:29 Join Date: Mar 2010 Location: Malvern View Photos By: littlehomer	Hey up, I've got a fully working tensioner from that engine you are welcome to if it turns out to be that seized. I paid £30 for the alternator pulley from GSF. Your issue is getting the old one off. You'll need the right tools. There's a thread about me changing it on here somewhere. It's almost cheaper to get a refurbished alternator in exchange for yours and change the whole unit. Or, for not much more you can get a new alternator as they normally come with pulley attached. Basically, remove the aux belt and there's a test you can do by spinning the alternator pulley by hand, stopping it and seeing if the alternator carries on to a stop or just stops with you stopping the pulley. I'd have a dig locally for an alternator refurbishing place. There's one here in Worcester for example. Cheers, Daniel.

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