Knocking noise over uneven surfaces

DanDotor · Oct 13th, 2019, 19:01

Looking for some advice, I have a 2009 XC60 with 207k on the clock, car drives well but 2 weeks ago a fairly loud knocking noise coming from the front left/middle started to occur when going over small bumps and uneven road surface. The first garage I took it to said they could not find any play in any element of the suspension etc. The second garage has also failed to find any fault but thinks it could be shock absorbers as one of them does make a knocking noise when going over speed bumps. Apparently they are prone to an internal failure that can create a knocking noise. They cannot guarantee this will fix the issue and it's essentially a £450 gamble, they have suggested that if this does not fix the issue they will change the anti roll bar bushes. I had the rear trailing arm bushes replaces about 60k ago and the sound is somewhat similar, its a hard dull knocking noise. Any advice would be greatly appreciated.

SeaShell · Oct 14th, 2019, 12:13

Check the front drop links. They can make a horrendous noise even with little obvious play.

SeaShell · Oct 14th, 2019, 12:18

https://www.eurocarparts.com/p/moog-...link-632590297

L80YLE · Jun 19th, 2020, 17:25

Hiya, just wondering if you resolved the knocking issue? My 2015 XC60 has a knocking issue on the NSF which still remains after changing the strut mount last weekend. I’m now thinking the internals of the shock absorber have failed?

Also has anyone got information as to the correct location of the strut mounting alignment tab?

DanDotor · Jun 19th, 2020, 17:48

Yes, I got the shock replaced but the noise continued, what fixed it for me was so obvious I was shocked that neither garage I took the car too thought of it. I simply lubricated the shock strut by getting some WD40 directly onto the strut, had to lift up the dust cover. Shocking that they didn't think of this after 3 separate trips to 2 different garages.

Whyman · Jun 19th, 2020, 20:17

I had a knocking noise from nsf end.

Turned out to be 4 in piece had broken off the bottom of the front spring. New spring cured it.

Oct 13th, 2019, 19:01	#1
DanDotor New Member Last Online: Jun 9th, 2023 18:32 Join Date: Jan 2018 Location: Horsham	Knocking noise over uneven surfaces Looking for some advice, I have a 2009 XC60 with 207k on the clock, car drives well but 2 weeks ago a fairly loud knocking noise coming from the front left/middle started to occur when going over small bumps and uneven road surface. The first garage I took it to said they could not find any play in any element of the suspension etc. The second garage has also failed to find any fault but thinks it could be shock absorbers as one of them does make a knocking noise when going over speed bumps. Apparently they are prone to an internal failure that can create a knocking noise. They cannot guarantee this will fix the issue and it's essentially a £450 gamble, they have suggested that if this does not fix the issue they will change the anti roll bar bushes. I had the rear trailing arm bushes replaces about 60k ago and the sound is somewhat similar, its a hard dull knocking noise. Any advice would be greatly appreciated. Last edited by DanDotor; Oct 13th, 2019 at 19:11.

Oct 14th, 2019, 12:13	#2
SeaShell Member Last Online: Jan 31st, 2022 19:03 Join Date: Feb 2018 Location: Belfast	Check the front drop links. They can make a horrendous noise even with little obvious play. __________________ 2105 V60 D4 Business Edition HK Sound, Winter Pack, Park Pilot, Leather with memory seat, TFT Dash, rebuilt engine.

Oct 14th, 2019, 12:18	#3
SeaShell Member Last Online: Jan 31st, 2022 19:03 Join Date: Feb 2018 Location: Belfast	https://www.eurocarparts.com/p/moog-...link-632590297 __________________ 2105 V60 D4 Business Edition HK Sound, Winter Pack, Park Pilot, Leather with memory seat, TFT Dash, rebuilt engine.

Jun 19th, 2020, 20:17	#6
Whyman Premier Member Last Online: Today 07:38 Join Date: Nov 2013 Location: Newark	I had a knocking noise from nsf end. Turned out to be 4 in piece had broken off the bottom of the front spring. New spring cured it. __________________ XC60 2013 D5 215 SE Lux Nav geartronic

Jun 19th, 2020, 17:25	#4
L80YLE New Member Last Online: May 31st, 2024 17:47 Join Date: Jun 2020 Location: NW	Hiya, just wondering if you resolved the knocking issue? My 2015 XC60 has a knocking issue on the NSF which still remains after changing the strut mount last weekend. I’m now thinking the internals of the shock absorber have failed? Also has anyone got information as to the correct location of the strut mounting alignment tab?

Jun 19th, 2020, 17:48	#5
DanDotor New Member Last Online: Jun 9th, 2023 18:32 Join Date: Jan 2018 Location: Horsham	Yes, I got the shock replaced but the noise continued, what fixed it for me was so obvious I was shocked that neither garage I took the car too thought of it. I simply lubricated the shock strut by getting some WD40 directly onto the strut, had to lift up the dust cover. Shocking that they didn't think of this after 3 separate trips to 2 different garages.

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