General: - Flapping belt

minstrelblue · Feb 9th, 2022, 12:46

Hello. My 2009 D5 xc90 has developed a rather alarming serpentine belt vibration . It's flapping and vibrating badly on tickover and Theres a chattering noise . The belt isn't running smoothly and I'm nervous it will snap. The tensioner and belt replaced 2 yrs ago.. is it the alternator pulley ?

Clan · Feb 9th, 2022, 13:06

Quote:

Originally Posted by minstrelblue

Hello. My 2009 D5 xc90 has developed a rather alarming serpentine belt vibration . It's flapping and vibrating badly on tickover and Theres a chattering noise . The belt isn't running smoothly and I'm nervous it will snap. The tensioner and belt replaced 2 yrs ago.. is it the alternator pulley ?

Yes , that is the purpose of the one way drive alternator pulley , to stop this vibration .It will be siezed.

Simmy · Feb 9th, 2022, 13:51

get it fixed straight away this kind of problem can total a d5 engine.

Familyman 90 · Feb 9th, 2022, 13:55

It's you call, but in your position I would be inclined not to drive the car until it is repaired as the risk of catastrophic engine damage if the belt fails or comes adrift is very real.

minstrelblue · Feb 9th, 2022, 15:06

Yes thanks all that responded. I will park it up and get it changed asap.

minstrelblue · Feb 11th, 2022, 16:01

UPDATE...
Had a mobile mechanic fit a new alternator today and it's completely cured the horrible vibration and noise. The pulley had indeed seized causing the vibration on the belt and the associated chatter noise.

ltec · Feb 11th, 2022, 19:00

Quote:

Originally Posted by minstrelblue

UPDATE...
Had a mobile mechanic fit a new alternator today and it's completely cured the horrible vibration and noise. The pulley had indeed seized causing the vibration on the belt and the associated chatter noise.

Did he replace the whole alternator or the faulty pulley?

minstrelblue · Feb 12th, 2022, 10:21

They replaced the whole alternator. It was the original and 12 years old so I thought it was best. But to be honest they didn't offer to swap the pulley so for peace of mind I swapped it for a new one.. it's cured the belt issue and I checked the old pulley against the new one and felt how the old one had locked up where the new one you can reverse the pulley if you twist it . Hope this helps. He said the only things that cause this issue is a locked pulley or a tensioner .in my case it was the pulley.

Familyman 90 · Feb 12th, 2022, 10:22

If it fixes the problem and gives you piece of mind then it was worth every penny.

AB-UK · Feb 12th, 2022, 10:28

Did he check the water pump too?

Feb 9th, 2022, 12:46	#1
minstrelblue minstrelblue Last Online: Apr 1st, 2023 21:26 Join Date: Feb 2011 Location: upminster	Flapping belt Hello. My 2009 D5 xc90 has developed a rather alarming serpentine belt vibration . It's flapping and vibrating badly on tickover and Theres a chattering noise . The belt isn't running smoothly and I'm nervous it will snap. The tensioner and belt replaced 2 yrs ago.. is it the alternator pulley ?

Feb 9th, 2022, 13:55	#4
Familyman 90 The Brit Brick Last Online: Aug 13th, 2023 09:39 Join Date: Jul 2021 Location: Warwickshire	It's you call, but in your position I would be inclined not to drive the car until it is repaired as the risk of catastrophic engine damage if the belt fails or comes adrift is very real. __________________ *2005 C70 2.4T Collection convertible. 40,000 mile sunny day toy.*

Feb 12th, 2022, 10:22	#9
Familyman 90 The Brit Brick Last Online: Aug 13th, 2023 09:39 Join Date: Jul 2021 Location: Warwickshire	If it fixes the problem and gives you piece of mind then it was worth every penny. __________________ *2005 C70 2.4T Collection convertible. 40,000 mile sunny day toy.*

Feb 12th, 2022, 10:28	#10
AB-UK Premier Member Last Online: Today 08:26 Join Date: Jul 2007 Location: Nottingham	Did he check the water pump too? __________________ 2010 XC90 Exec (m/y 2011), Electric Silver 2003 XC90 SE, Ash Gold 1996 850 GLE Estate, Olive Green Pearl

Feb 9th, 2022, 13:51	#3
Simmy Premier Member Last Online: Yesterday 22:35 Join Date: Mar 2017 Location: Manchester	get it fixed straight away this kind of problem can total a d5 engine.

Feb 9th, 2022, 15:06	#5
minstrelblue minstrelblue Last Online: Apr 1st, 2023 21:26 Join Date: Feb 2011 Location: upminster	Yes thanks all that responded. I will park it up and get it changed asap.

Feb 11th, 2022, 16:01	#6
minstrelblue minstrelblue Last Online: Apr 1st, 2023 21:26 Join Date: Feb 2011 Location: upminster	UPDATE... Had a mobile mechanic fit a new alternator today and it's completely cured the horrible vibration and noise. The pulley had indeed seized causing the vibration on the belt and the associated chatter noise.

Feb 12th, 2022, 10:21	#8
minstrelblue minstrelblue Last Online: Apr 1st, 2023 21:26 Join Date: Feb 2011 Location: upminster	They replaced the whole alternator. It was the original and 12 years old so I thought it was best. But to be honest they didn't offer to swap the pulley so for peace of mind I swapped it for a new one.. it's cured the belt issue and I checked the old pulley against the new one and felt how the old one had locked up where the new one you can reverse the pulley if you twist it . Hope this helps. He said the only things that cause this issue is a locked pulley or a tensioner .in my case it was the pulley.

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