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Home > Technical > Auxillary Tensioner / Idler pulley |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
Hi Guys,
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2nd Sep 2024 1:07 pm |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
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2nd Sep 2024 1:13 pm |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
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2nd Sep 2024 1:14 pm |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
Jules, was kinda thinking it was injector related but not confident with a self diagnosis
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2nd Sep 2024 1:42 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4947 |
The EGR unit is just below that area, and turbo below that, and I wonder if there is an exhaust leak.
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2nd Sep 2024 3:33 pm |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
Thanks Jules, I'll have a go at it tomorrow when the weather improves. Don't recall any exhaust fumes or sign there was a blow out but will check and see if there's anything loose and possibly a better video. Also the possibility of a loose or outgoing injector. |
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2nd Sep 2024 6:43 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4947 |
Perhaps Im not hearing what you are.
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3rd Sep 2024 7:43 am |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
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3rd Sep 2024 7:17 pm |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
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3rd Sep 2024 7:19 pm |
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I Like Chips Member Since: 25 Jun 2017 Location: Ascott Under Wychwood Posts: 1529 |
I had to replace one of my idler pullies about three years ago, fine up to a few weeks ago when I changed my belts and the gubbins |
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3rd Sep 2024 7:53 pm |
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Bluebird1999 Member Since: 05 Jan 2017 Location: Cumbria Posts: 99 |
The pulley on the alternator could be causing that, it has a one way slipping clutch that prevents the belt whipping on deceleration. https://www.freel2.com/forum/topic40119.ht...tor+pulley 64 plate TD4 SE Santorini Black 2021 Mazda MX5 GT Sport Tech |
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3rd Sep 2024 7:59 pm |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
Thanks Bluebird, very much appreciated for the link. Looks like I’ll be busy on our return from holiday. Just hope it gets us there and back again 😂 |
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3rd Sep 2024 8:08 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4947 |
That slapping of the belt on the tensioner pulley is very characteristic of a worn overun alternator pulley (OAP) - it works like a freehub on a bicycle - allowing the alternator to continue to spin fast when the engine slows down. When the OAP fails it drags the alternator down and puts a lot of extra tension in the belt causing the tensioner pulley to jump about . The OAP is easy to test with the AUX belt off.
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3rd Sep 2024 11:51 pm |
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O-B-Wan003 Member Since: 12 Sep 2017 Location: county Down Posts: 125 |
Jules, very much appreciated!
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4th Sep 2024 4:29 am |
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