Strange noise

scorpio stu · Nov 30th, 2019, 13:25

https://youtu.be/ZuYeV2WUJYE

Not sure if I've done this correctly but can anyone diagnose the noise. Spray wd40 on the are and it goes. 2.4 petrol auto.
Thanks

Clan · Nov 30th, 2019, 13:33

...................

JoeNinety · Nov 30th, 2019, 13:38

Which area are you spraying to make the noise go away? Sounds loudest at the cam sprocket end of things from the video.

Georgeandkira · Nov 30th, 2019, 13:41

Where did you spray the WD-40?
You can dismount the accessory belt and se if the noise disappears.

scorpio stu · Nov 30th, 2019, 15:42

I sprayed where the belt goes round the alternator which stops the noise straight away (for a day,then comes back).to me the sound seems to be coming from further back though on the same side.

scorpio stu · Nov 30th, 2019, 15:43

Quote:

Originally Posted by Clan

Nice video but there is no sound .....

Did you manage to get the sound working ?

Clan · Nov 30th, 2019, 16:11

Quote:

Originally Posted by scorpio stu

Did you manage to get the sound working ?

yes thanks , computer needed restarting .. it is a clattering , so is it the valve on top clattering , or the balls loose in one of the belt tensioners or the alternator one way clutch ? Best to take off the AUX belt and try it ... and check the alternatior pulley one way clutch and the Aux belt tensioner pulley bearing , it should turn freely and smoothly and should have a little rock side to side.

Brendan W · Dec 1st, 2019, 10:40

If the tensioner pulley is moving at idle and it appears to be at six seconds in, my money is on the alternator freewheel.

scorpio stu · Dec 2nd, 2019, 00:21

Quote:

Originally Posted by Brendan W

If the tensioner pulley is moving at idle and it appears to be at six seconds in, my money is on the alternator freewheel.

Not being too handy with the tools are you saying to replace the alternator?
Thanks

Brendan W · Dec 2nd, 2019, 09:01

Quote:

Originally Posted by scorpio stu

Not being too handy with the tools are you saying to replace the alternator?
Thanks

No, just the freewheel pulley. As Clan suggested, remove the aux belt and check the pulley. It should be free one way. You could ask someone to stop the motor as you look at the belt. The pulley should not jump around and the innards of the alternator should run on for about a second after the belt stops.
While the belt is off check all the pulleys. The a/c compressor clutch bearing can go off. It is typically noisy only when the clutch is disengaged and it tries to freewheel, the noise then stops when the a/c compressor engages.

Nov 30th, 2019, 13:25	#1
scorpio stu Member Last Online: Mar 29th, 2024 07:53 Join Date: Nov 2008 Location: Essex	Strange noise https://youtu.be/ZuYeV2WUJYE Not sure if I've done this correctly but can anyone diagnose the noise. Spray wd40 on the are and it goes. 2.4 petrol auto. Thanks __________________ Current cars: 2004 Range Rover 4.4 V8 Petrol 2002 V70 Petrol Triumph Sprint ST1050 Previous Volvos :2001 v70 2002 v770 244GLT saloon 244GLT Estate 740 gle saloon 760 turbo saloon 480 es.

Nov 30th, 2019, 13:33	#2
Clan Experienced Member Last Online: Today 14:22 Join Date: Jun 2007 Location: L/H side	................... __________________ My comments are only based on my opinions and vast experience . Last edited by Clan; Nov 30th, 2019 at 16:10.

Nov 30th, 2019, 13:38	#3
JoeNinety Senior Member Last Online: Today 17:51 Join Date: May 2019 Location: Winchester	Which area are you spraying to make the noise go away? Sounds loudest at the cam sprocket end of things from the video. __________________ V70 P2 2006 2.4 Petrol 170bhp Est SE Automatic (5 speed) MG Midget Mk1 1962 Previous: RR TDV8 3.6 '08; RR TD6 3.0 '02; RR P38A V8 '99; Audi A4 Cab 3.0 V6 2004; Volvo 740 GLE Est 1989 Have VIDA & VXDIAG NANO on W10Pro - happy to help

Nov 30th, 2019, 15:42	#5
scorpio stu Member Last Online: Mar 29th, 2024 07:53 Join Date: Nov 2008 Location: Essex	I sprayed where the belt goes round the alternator which stops the noise straight away (for a day,then comes back).to me the sound seems to be coming from further back though on the same side. __________________ Current cars: 2004 Range Rover 4.4 V8 Petrol 2002 V70 Petrol Triumph Sprint ST1050 Previous Volvos :2001 v70 2002 v770 244GLT saloon 244GLT Estate 740 gle saloon 760 turbo saloon 480 es.

Nov 30th, 2019, 13:41	#4
Georgeandkira Premier Member Last Online: Today 13:03 Join Date: Feb 2009 Location: Hackensack	Where did you spray the WD-40? You can dismount the accessory belt and se if the noise disappears.

Dec 1st, 2019, 10:40	#8
Brendan W Premier Member Last Online: Apr 2nd, 2024 19:50 Join Date: Dec 2007 Location: Wexford	If the tensioner pulley is moving at idle and it appears to be at six seconds in, my money is on the alternator freewheel.

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