DS9 Rear Suspension
Discussion
Hi
I did some sound deadening on the passenger side back wheelarch area this weekend, there isnt much there so I filled it out on various sides a fair bit with dodomat and closed cell foam. The top area was a pain and I couldnt get to it but generally happy with it.
I noticed what I think the suspension geometry is. On the front the bump stops would be inside the shocks but on the rear they are just a plasticky rubber thing that seems to sit on a suspension plate, looks quite rudimentary. X marks the spot so they seem to be hitting the right place. I turned the bump stop around to show the model number, the part comes up on a few latvian sites etc. Strange to see BASF on there, not sure if they are the same brand as made video tapes etc in the 1980s.
Just wondered if there was any way to perhaps easily improve the situation, either by upgrading the bump stops? or the other thought i had later was putting a but of high density rubber in the "cup"..... but I presume this would wear away?
I did some sound deadening on the passenger side back wheelarch area this weekend, there isnt much there so I filled it out on various sides a fair bit with dodomat and closed cell foam. The top area was a pain and I couldnt get to it but generally happy with it.
I noticed what I think the suspension geometry is. On the front the bump stops would be inside the shocks but on the rear they are just a plasticky rubber thing that seems to sit on a suspension plate, looks quite rudimentary. X marks the spot so they seem to be hitting the right place. I turned the bump stop around to show the model number, the part comes up on a few latvian sites etc. Strange to see BASF on there, not sure if they are the same brand as made video tapes etc in the 1980s.
Just wondered if there was any way to perhaps easily improve the situation, either by upgrading the bump stops? or the other thought i had later was putting a but of high density rubber in the "cup"..... but I presume this would wear away?
It feels like it hits the bump stops all too regularly, especially when there is a jolt in the road.
I've since found through querying via another forum something amiss. This part is apparently called a rubber rebound according to someone who has expertise in the subject. As far as I know the DS9 range was first produced in early 2020 and the build date codes up to 26th July 2020 had this part fitted. part: 9824164780. Apparently they are £46 each.
From that date onwards, 27th July 2020 they fitted what seems a superior "buffer" installed which costs circa £126. part: 9834333080. I had a quick look around and this is also installed on the Citroen C5 Aircross.
So what's the problem? Well my car apparently has a build date of 18th June 2021, give or take 11 months later than the cutoff date, yet still has the old part fitted.
Not sure what the reason could be? Perhaps as it was during covid they didnt have the proper part so used old stock? Does the fact the part was changed in the first place indicate they thought it was substandard?
Now I'm wondering if other suspension components are perhaps earlier versions of what should be there. I have no idea.
I've since found through querying via another forum something amiss. This part is apparently called a rubber rebound according to someone who has expertise in the subject. As far as I know the DS9 range was first produced in early 2020 and the build date codes up to 26th July 2020 had this part fitted. part: 9824164780. Apparently they are £46 each.
From that date onwards, 27th July 2020 they fitted what seems a superior "buffer" installed which costs circa £126. part: 9834333080. I had a quick look around and this is also installed on the Citroen C5 Aircross.
So what's the problem? Well my car apparently has a build date of 18th June 2021, give or take 11 months later than the cutoff date, yet still has the old part fitted.
Not sure what the reason could be? Perhaps as it was during covid they didnt have the proper part so used old stock? Does the fact the part was changed in the first place indicate they thought it was substandard?
Now I'm wondering if other suspension components are perhaps earlier versions of what should be there. I have no idea.
500x said:
It feels like it hits the bump stops all too regularly, especially when there is a jolt in the road.
You may be feeling the jolt through the damper rather than the impact on the bump stops. If you were hitting the bump stops regularly I'd expect them to look a lot more used than your pictures show. If you are hitting them regularly, the problem is that the suspension is not set up suitably for the way you're using the car - perhaps it's riding too low or the suspension is too soft. The solution is to fix the suspension, not fit better bump stops. You should not expect to hit the bump stops in normal driving.
The rest of your post gives the impression you're looking for components that you could replace or upgrade for no particular reason. Nothing you've posted about it so far stands out as a problem that needs fixing.
I'm not sure what is causing the jolt, whether it is the damper or the stop.
The first batch of DS9's were made in early 2020 and it wasnt long after in July they sought reason to upgrade them. There could be other reasons but it's not unreasonable to expect it was because they weren't doing what they should be doing. I don't know if it is rising too low but I have the non phev version and the car is relateively light on the back end (the car only weighs 1540kg anyway which is light for a car almost 5m long.) When I go over those very narrow speed humps it jolts, while on normal wavey speed humps it kinda floats over unless I drive too fast. I think therefore it's something that occurs at the extremeties of travel, i.e. when the acceleration of the dampers gets too high.
The suspension on the car has bugged me since I bought it. OK, it's firm riding but for some reason for example the front passenger side throws up a lot more noise than the drivers side so I expect it's something which is asymmetrical about the car. The drivers side knocks a little over bumps but it's a subdued low level noise, while on the drivers side it's much louder and higher pitched. I've tried a few things but still it's not eradicated.
I did recently see a youtube clip of the BMW I3 which can suffer from the same problem, apparently it's due to an engine component rubbing on the plastic wheel surround and all it needs is a bit of padding inbetween. This is what I'm going to look at next.
The first batch of DS9's were made in early 2020 and it wasnt long after in July they sought reason to upgrade them. There could be other reasons but it's not unreasonable to expect it was because they weren't doing what they should be doing. I don't know if it is rising too low but I have the non phev version and the car is relateively light on the back end (the car only weighs 1540kg anyway which is light for a car almost 5m long.) When I go over those very narrow speed humps it jolts, while on normal wavey speed humps it kinda floats over unless I drive too fast. I think therefore it's something that occurs at the extremeties of travel, i.e. when the acceleration of the dampers gets too high.
The suspension on the car has bugged me since I bought it. OK, it's firm riding but for some reason for example the front passenger side throws up a lot more noise than the drivers side so I expect it's something which is asymmetrical about the car. The drivers side knocks a little over bumps but it's a subdued low level noise, while on the drivers side it's much louder and higher pitched. I've tried a few things but still it's not eradicated.
I did recently see a youtube clip of the BMW I3 which can suffer from the same problem, apparently it's due to an engine component rubbing on the plastic wheel surround and all it needs is a bit of padding inbetween. This is what I'm going to look at next.
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