Strangely firm suspension

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Alastair
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Strangely firm suspension

Post by Alastair » Tue Jan 26, 2016 11:22 pm

My 1700 diesel was bought by me having been standing unused for Ten years.....it's now re piped etc etc etc MOT tested and in daily use....... However I do find the suspension strangely firm compared to others I have owned..... Having checked the spheres in the usual way as in car running and press the car down ...... It goes down no problem both front and back. But when you drive the car you could convince yourself the spheres were nearly flat...... Mind you I was surprised they weren't after standing so long...... And rear arm bearings were replaced too...... Any thoughts as to why it's so firm?
Bx turbo diesel 1989
Bx 1.9 Rd estate 1989
Citroen Light 15 1952
Bx 17 TZD diesel turbo 1992
Xantia 1.8 16v

RobC
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Re: Strangely firm suspension

Post by RobC » Wed Jan 27, 2016 1:01 pm

I'm astounded that after standing for ten years the spheres aren't flat. They normally have a life of only five years or so. I also suspect the front arms and struts will not be as supple as they once were and you may need to replace some bushes
1991 Citroen BX 16v

Alastair
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Re: Strangely firm suspension

Post by Alastair » Wed Jan 27, 2016 11:57 pm

So Rob ..... Are you suggesting a sphere change anyway? And which bushes are you hinting at?
Bx turbo diesel 1989
Bx 1.9 Rd estate 1989
Citroen Light 15 1952
Bx 17 TZD diesel turbo 1992
Xantia 1.8 16v

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Re: Strangely firm suspension

Post by RobC » Thu Jan 28, 2016 4:47 pm

They might be able to be regassed (though this depends on the brand of sphere apparently, and is often not that much cheaper than brand new ones).

The bushes on the front are wishbone bushes, and also a duff balljoint can affect ride in my experience. The struts may be sticking internally, which can sometimes be cured by lubing, but ultimately require reconditioned ones to be fitted.
1991 Citroen BX 16v

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MULLEY
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Re: Strangely firm suspension

Post by MULLEY » Wed Feb 10, 2016 10:33 pm

Have you changed the lhm?
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Re: Strangely firm suspension

Post by mds141 » Wed Feb 10, 2016 10:53 pm

Air ingress into the hydraulic system can also be a cause of a firm ride. A change of LHM wouldn't hurt and check the tightness of the LHM lines into and out of the HP pump. While you're at it, check the condition of the filters in the LHM tank.
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Alastair
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Re: Strangely firm suspension

Post by Alastair » Thu Feb 11, 2016 7:56 am

Thanks for the interest.... It's given me a few ideas
Bx turbo diesel 1989
Bx 1.9 Rd estate 1989
Citroen Light 15 1952
Bx 17 TZD diesel turbo 1992
Xantia 1.8 16v

sdelasal
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Re: Strangely firm suspension

Post by sdelasal » Thu Feb 11, 2016 6:12 pm

Is the suspension soft when you push down on the corners of the car with the engine running/suspension up?

Alastair
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Re: Strangely firm suspension

Post by Alastair » Thu Feb 11, 2016 10:12 pm

Yes it is , sdelasal..... That's what puzzles me!
Bx turbo diesel 1989
Bx 1.9 Rd estate 1989
Citroen Light 15 1952
Bx 17 TZD diesel turbo 1992
Xantia 1.8 16v

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mat_fenwick
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Re: Strangely firm suspension

Post by mat_fenwick » Fri Feb 12, 2016 9:21 pm

Ride height is another to consider, although quick and free to check!
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Re: Strangely firm suspension

Post by Tim Leech » Fri Feb 12, 2016 9:49 pm

I would recommend a new set of spheres and fresh lhm.
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1994 Xantia 1.8i SX
1972 Morris Marina 1.8 SDL
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Alastair
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Re: Strangely firm suspension

Post by Alastair » Sun Mar 13, 2016 11:07 pm

Looks like I am going down that route Tim..... Will repost back.
Bx turbo diesel 1989
Bx 1.9 Rd estate 1989
Citroen Light 15 1952
Bx 17 TZD diesel turbo 1992
Xantia 1.8 16v