Replacing Sway Bar Bushings - S70 front end clunks

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kevins s70
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Year and Model: 1998 S70
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Replacing Sway Bar Bushings - S70 front end clunks

Postby kevins s70 » Fri Jul 29, 2011 1:45 pm

I have a 98 S70 that makes a loud clunk typically when i hit bumps at slow speed. A mechanic looked at it and says it is the sway bar bushings that need to be replaced. On a hoist the car will clunk when lowered and if you hold on to the sway bar you can feel it resonate. I would prefer to just replace the sway bar bushings and not the sway bar itself. Probably a good time to replace the end links also. Is this a DIY job? The sway bar bushings appear to be held only by 2 bolts that screw into the cross frame. Thanks

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erikv11
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Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby erikv11 » Fri Jul 29, 2011 2:15 pm

If you go to the IPD web page, you can find instructions for replacing the sway bar. It is a little complicated, you have to lower the subframe a little to get clearance.
'95 T5-R 854 | m4.4 | 180 k
'96 NA 855 | 131 k
'98 V70 GLT | 15g turbo, T5 tune & injectors | 258 k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 NA S70 174 k

kevins s70
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Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby kevins s70 » Fri Jul 29, 2011 3:14 pm

I am not looking to replace the sway bar itself but only the bushings. Would think the replacment of the bushings is far less complex. There is benefits to replacing the sway bar itself but that isn't in the budget.

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erikv11
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Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby erikv11 » Fri Jul 29, 2011 6:57 pm

Haha, in theory you would think that, yes, but in actuality replacement of the bushing is actually even *more* complex than removing the sway bar.

The rubber bushings are vulcanized to the sway bar, and not intended by Volvo to be replaceable. The only way to replace them is to remove the sway bar, then scrape/burn them off, then put on some kid of aftermarket substitution, then re-install the bar.

I wasn't suggesting you replace the bar, just directing you to instructions for getting it out. Sounded like you were intending to just do the bushings. However, the standard solution to problems with the bushings is to replace the sway bar. To be fair, the bushings rarely fail, so I would be very sure that is the problem before going down that road. How sure is the mechanic? Maybe he actually meant the end links?
'95 T5-R 854 | m4.4 | 180 k
'96 NA 855 | 131 k
'98 V70 GLT | 15g turbo, T5 tune & injectors | 258 k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 NA S70 174 k

kevins s70
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Year and Model: 1998 S70
Location: Toronto

Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby kevins s70 » Fri Jul 29, 2011 8:06 pm

Thanks - that explains a lot !!! I didn't know the bushings were vulcanized to the bar. That said, the shop i took it to is not a Volvo shop. Visually i looked at the bushings and they look ok but the mechanic insists it is the sway bar bushings and not the end links. Is it possible to determine which is at fault ?? The end links on this model i know are fragile.

valvster
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Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby valvster » Sat Jul 30, 2011 2:18 am

Here's a link to the bushes at a UK volvo shop, bit expensive, should be available cheaper in the USA I would think.
http://www.partsforvolvosonline.com/def ... 46_385_387
Unless the bushes are totally shot I would try and fabricate some sort of packing to force in around the bar or bush to reduce the slop.
Even replacing with a new bar looks like a job not to be attempted on a couple of jack stands.

Valvster

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peacock
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Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby peacock » Sat Jul 30, 2011 2:35 am

it really sounds as though it is the sway bar links making the noise. The spring seat is also a pretty common clunk spot on the 70 series cars.

If the bushing are indeed bad it would be the first time in 2 years of using this website i have ever seen it come up.
1998 S70 T5 SE 214,001
1999 v70R 126,000

kevins s70
Posts: 78
Joined: Fri Jul 22, 2011 12:02 pm
Year and Model: 1998 S70
Location: Toronto

Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby kevins s70 » Sat Jul 30, 2011 11:41 pm

Thanks for the input. From the info i have gotten it sounds like i should just replace the end links first. There doesn't seem to be a conclusive way to determine if it is the sway bar bushings and they seldom go anyways.

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erikv11
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Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby erikv11 » Sun Jul 31, 2011 12:01 am

Might as well check the spring seat, at least you can tell if those are totally shot. Take a wrench to that nut on top of the strut tower, under the hood. Does the nut spin freely (bad), or do you get resistance when you try to turn it (good)?
'95 T5-R 854 | m4.4 | 180 k
'96 NA 855 | 131 k
'98 V70 GLT | 15g turbo, T5 tune & injectors | 258 k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 NA S70 174 k

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Re: Replacing Sway Bar Bushings - S70 front end clunks

Postby matthew1 » Sun Jul 31, 2011 1:38 am

Can you take a video via phone of the sound while someone else drives? I did spring seats on my V70 6 months ago (admittedly a 2004 model, but the concept is identical), and I would know the sound of a failed spring seat in my sleep. Lived with it for a month or two.

If you upload to YouTube, you can embed the video directly into this topic (search for instructions), or simply link to it.
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