V70 FWD light knocking sound from rear?

Willber · Sep 16th, 2021, 18:01

Ever since I have had my V70 and done approx 6.5k miles in it, it has had a light knocking from the rear on small bumps.

It doesn't tend to do it when there is weight in the car.

I have replaced the drop links and the shocks are quite recent also, but I noticed from the service history it has had a few pairs of rear shocks over the years. Are they a known weak spot? Could this be the source of the knock, or are there any other common culprits?

A pair of shocks is only £80 or so, so not that big a deal to change anyway.

Cheers!

Kev0607 · Sep 17th, 2021, 09:20

Did you replace the upper shock mounts?

Another culprit is the rear trailing arm bushings.

MWMan · Sep 17th, 2021, 10:58

Probably too obvious, but check the exhaust hangers. The steel arms on the exhaust that fit into the support rubbers are prone to corroding and coming off. This causes a knocking at the back over bumps.

john f · Sep 17th, 2021, 18:15

It could be anti roll bar bushes
my 2007 d5 had a knock at the rear and cutting the old bushes off the bar and fitting new aftermarket rubbers cured the problem

John F

Willber · Sep 19th, 2021, 13:04

Thanks all.

I did replace the upper front spring mounts and bearings.

I did think it might be exhaust rubbers/mounts but they look OK. Probably need to jack up and have a better look. Yhe trailing arm bushes are starting to split but not bad at all

Sep 16th, 2021, 18:01	#1
Willber Junior Member Last Online: Dec 12th, 2022 20:46 Join Date: Sep 2010 Location: Leeds	V70 FWD light knocking sound from rear? Ever since I have had my V70 and done approx 6.5k miles in it, it has had a light knocking from the rear on small bumps. It doesn't tend to do it when there is weight in the car. I have replaced the drop links and the shocks are quite recent also, but I noticed from the service history it has had a few pairs of rear shocks over the years. Are they a known weak spot? Could this be the source of the knock, or are there any other common culprits? A pair of shocks is only £80 or so, so not that big a deal to change anyway. Cheers!

Sep 17th, 2021, 09:20	#2
Kev0607 Premier Member Last Online: Today 16:48 Join Date: Apr 2019 Location: Manchester	Did you replace the upper shock mounts? Another culprit is the rear trailing arm bushings. __________________ 2007 S80 2.4 D5 - 110,000 miles Last edited by Kev0607; Sep 17th, 2021 at 09:26.

Sep 17th, 2021, 10:58	#3
MWMan Senior Member Last Online: Yesterday 04:27 Join Date: Jan 2016 Location: Bishops Stortford	Probably too obvious, but check the exhaust hangers. The steel arms on the exhaust that fit into the support rubbers are prone to corroding and coming off. This causes a knocking at the back over bumps. __________________ 2003 Volvo V70 2.4 Auto 170k

Sep 17th, 2021, 18:15	#4
john f Senior Member Last Online: Apr 5th, 2024 08:10 Join Date: Jul 2011 Location: worcester	It could be anti roll bar bushes my 2007 d5 had a knock at the rear and cutting the old bushes off the bar and fitting new aftermarket rubbers cured the problem John F

Sep 19th, 2021, 13:04	#5
Willber Junior Member Last Online: Dec 12th, 2022 20:46 Join Date: Sep 2010 Location: Leeds	Thanks all. I did replace the upper front spring mounts and bearings. I did think it might be exhaust rubbers/mounts but they look OK. Probably need to jack up and have a better look. Yhe trailing arm bushes are starting to split but not bad at all

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