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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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Clonk.Views : 1803 Replies : 27Users Viewing This Thread : |
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Jul 21st, 2022, 14:12 | #1 |
Master Member
Last Online: Apr 25th, 2024 11:15
Join Date: Oct 2011
Location: Great Yarmouth
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Clonk.
We have had an annoying Clonk type noise coming from under our 2006 XC70 I have been looking for it for the last few weeks. I have narrowed it down to the front of the car as if you drive over a speed bump the noise can be heard before the rear goes over the bump.
It sounds like a metal to metal type of clonk. at first I thought it could be a roll bar end link but having checked both sides they are fine. (I had replaced them around 9 months ago but some wear out quicker than others). The noise has gradually got louder over the last couple of weeks. I have checked the ARB bushes which are fine with no play. I have checked every bush I could find and still found nothing of concerned. I have changed BOTH wishbones around a month ago so the bushes are good on them. I have had the wheels of the ground and a big bar under each front wheel and got my mate to wiggle the bar up and down and can find NO play anywhere. I have checked the driveshafts both sides for play and can find nothing. Checked the driveshaft bolts for tightness in the hubs, both sides are tight. It had its MOT last week so I mentioned this before hand. It passed with an advisory for the rear ARB bushes or pin slight play but not worn to excess. I did check them out and there is the smallest amount of movement but nothing to suggest the noise I am getting which I have eliminated to the front anyway. Looked again the other day and the offside front driveshaft has a slight amount of lateral movement, I would say around 0.5 mm aprox. If I move it sharply it does make a knocking noise. The movement appears to be the shaft sliding into the joint at the internal splines as opposed to any movement in the joint itself. The N/S shaft does not seem to have any play, or at least nothing I could detect. Should there be any significant play in the driveshafts where they go into the joint ? I understand that the length from gearbox to roadwheel will alter as the vehicle is driven over various surfaces via the suspension but that is the job of the CV Joints to allow for this. Any suggestions welcome. |
Jul 21st, 2022, 14:44 | #2 |
trying to be helpful
Last Online: Today 16:30
Join Date: Aug 2020
Location: Dagenham
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my clonk when i had one was similarly difficult to locate, checked all the same things but it turned out to be balljoints
I had also recently changed the wishbones and it wasnt obvious at the time it also wasn't obvious with everything bolted together, presumably because it's under so much tension. but as soon as I disconnected it the bolt end flopped about loose as anything and it was glaringly obvious I may have overtightened them when replacing wishbones and killed them off. Not sure but now I always torque them correctly may or may not be the same for you Last edited by stuart bowes; Jul 21st, 2022 at 14:47. |
Jul 21st, 2022, 14:58 | #3 |
Master Member
Last Online: Apr 25th, 2024 11:15
Join Date: Oct 2011
Location: Great Yarmouth
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That's interesting Stuart. I did change the N/S balljoint when I changed the wishbone as it was, like yours, flopping about. However the O/S balljoint seemed fine with the expected resistance in all planes.
Not an expensive item to change if I find nothing else but I was comfortable that it was still serviceable and it is showing NO signs of excessive movement. Thanks Malcolm |
Jul 21st, 2022, 18:55 | #4 |
Spannering since birth
Last Online: Apr 27th, 2024 21:26
Join Date: Jul 2006
Location: North Oxon
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The common causes are loose centre bolts holding the driveshafts into the hub - renew these bolts with genuine Volvo and angle tighten to spec - they are single use bolts.
Also ball joints are Stuart mentioned - not easy to test without the lower arm off. Have you got steel or alloy lower arms ?
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V70 D5 eu4 manual M66 2006 > XC90 brake conversion, stage 2 VDASH remap. BMW R1200GS BMW R1100GS (GS Addict) |
Jul 21st, 2022, 19:12 | #5 |
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Last Online: Today 15:38
Join Date: Apr 2011
Location: Belfast
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Check your calipers. Make sure the slider pins are tight, the caliper carrier bolts are secure and the retaining springs are in place. Loose slider pins will give a metallic rattle/clonk over rough surfaces.
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Jul 22nd, 2022, 02:29 | #6 |
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Last Online: Apr 27th, 2024 13:23
Join Date: Feb 2009
Location: Hackensack
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How many miles are on your '06?
Maybe a strut element is weight/speed bump related? Struts themselves can make an array of sounds and a bearing mount could have separated somehow. That'd be metallic in sound. A rear suspension arm bushing? Something touching the center driveshaft? |
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