Hey there,
I have been reading through some old threads regarding this topic, and found out that my BX rides a bit too high on its normal suspension setting. I did the "four finger test" (gap between tire and wheel arch), and concluded that it rides 3-5 cm too high. The rear also raises slightly after coming to a stop, and the front drops about 3-5 cm immediately after shutting it off. Now, I have seen some discussion regarding what the best way is to adjust the suspension, but I haven't managed to track down any mention of what exactly needs to be adjusted in order to change ride height. If anyone knows, I'd greatly appreciate it!
Cheers!
Adjusting ride height on normal suspension setting
-
- BXpert
- Posts: 185
- Joined: Fri Sep 10, 2021 6:22 pm
- Location: Osijek, Croatia
- My Cars: 1989 Cimos-Citroën BX 16 TRS
2007 BMW 318D (the "company car") - x 43
Adjusting ride height on normal suspension setting
Proudly daily driving a 1989 BX 16 TRS since 2021
-
- BXpert
- Posts: 268
- Joined: Thu May 20, 2021 7:21 pm
- Location: Tunbridge Wells
- My Cars: Citroen BX14 RE
Nissan Micra Shape - x 31
Re: Adjusting ride height on normal suspension setting
The rear raising when coming to a stop is completely normal. When braking, all hydraulic effort is directed to the brakes, so pressure will release in the suspension.
The height correctors operate via a linkage which connects to the anti-roll bars. To adjust, get the car on a 4-post lift, never on the ground slacken the bolt on the linkage clamp just enough so the clamp moves with the tap of the hammer. When you move the clamp, the linkages will move, and the front will rise or fall depending on the direction it turns.
This is a bit of a general overview as I recently went and had a specialist adjust the height and allowed me to see how it worked. I mightn't be completely correct.
The height correctors operate via a linkage which connects to the anti-roll bars. To adjust, get the car on a 4-post lift, never on the ground slacken the bolt on the linkage clamp just enough so the clamp moves with the tap of the hammer. When you move the clamp, the linkages will move, and the front will rise or fall depending on the direction it turns.
This is a bit of a general overview as I recently went and had a specialist adjust the height and allowed me to see how it worked. I mightn't be completely correct.
-
- 1K Away
- Posts: 1937
- Joined: Tue Jul 05, 2005 7:54 am
- Location: Usually in the garage
- My Cars: BX GTi, C3 Auto
- x 88
Re: Adjusting ride height on normal suspension setting
I learnt how to adjust the height linkages from Haynes so if you don't have a copy this would be a good acquisition to help you understand the process. I never measure the actual height in mms as the 4 finger test is good enough and adjust the rear end after the front and get the sills parallel to the ground. Its important to have the correct linkage gaps for the HC operating arm at the front and rear.
Its not difficult to do but be prepared to do it safely and to not get it right the first few attempts.
Its not difficult to do but be prepared to do it safely and to not get it right the first few attempts.
The Joy of BX with just one Citroën BX to my name now. Will I sing Bye Bye to my GTI or will it be Till death us do part.
-
- BXpert
- Posts: 681
- Joined: Sat Sep 12, 2020 4:04 pm
- Location: Sayalonga, Malaga
- My Cars: 1992 BX19D Millesime
- LHD, NA, AC, RP_5800
1996 XM 2.5TD Exclusive - x 73
Re: Adjusting ride height on normal suspension setting
Rear raising when braking is normally a sign that there is air trapped in the rear suspension/brakes. This readily compresses when the brakes are applied, but expands again when the brakes are eased off, which can cause the rear end to rise.
Excessively fierce rear brakes (rare on hydraulic Citroens, with their small rear discs and pads) would cause the rear end to squat when brakes were applied.
One of the great things about our fluid suspension is that the car is designed to ride level under all normal conditions.
An emergency stop might cause a small amount of front end dive, but this should be minimal.
Excessively fierce rear brakes (rare on hydraulic Citroens, with their small rear discs and pads) would cause the rear end to squat when brakes were applied.
One of the great things about our fluid suspension is that the car is designed to ride level under all normal conditions.
An emergency stop might cause a small amount of front end dive, but this should be minimal.
Chris
-
- BXpert
- Posts: 289
- Joined: Wed Feb 10, 2010 9:01 am
- Location: Hollola, Finland
- x 16
Re: Adjusting ride height on normal suspension setting
Yes. And to get rid of this, bleed the rear brakes. Engine running, rear wheels on ground, install brake assistant (here we have snow brush or small shovel, to push the brake pedal) and loose a little the nipple in the saddle. There will be a lot of pressure and air bubbles so hold a rag over it not to make a mess. If you don't have alloys of teenage-driver model, then this trick won't work as you need to remove the wheel to get access .white exec wrote: ↑Tue Nov 09, 2021 7:50 am Rear raising when braking is normally a sign that there is air trapped in the rear suspension/brakes. This readily compresses when the brakes are applied, but expands again when the brakes are eased off, which can cause the rear end to rise.
BX 4x4 estate, several BX Van's and some more normal estates in Finland.
-
- BXpert
- Posts: 681
- Joined: Sat Sep 12, 2020 4:04 pm
- Location: Sayalonga, Malaga
- My Cars: 1992 BX19D Millesime
- LHD, NA, AC, RP_5800
1996 XM 2.5TD Exclusive - x 73
Re: Adjusting ride height on normal suspension setting
This is the official way to bleed the braking system...
. Source: Citroen 'Private Cars' booklet, 1992 CAR050920 p.202 (AX, ZX, BX, XM)
. Source: Citroen 'Private Cars' booklet, 1992 CAR050920 p.202 (AX, ZX, BX, XM)
Chris
-
- Over 2k
- Posts: 5918
- Joined: Wed Dec 16, 2009 8:02 pm
- Location: Harwood, Bolton
- My Cars: Land Rover Discovery Series 1 200tdi 3 door
Land Rover Discovery Series 2 Facelift TD5
2020 Fiat Panda cross 4x4 twin air. - x 27
Re: Adjusting ride height on normal suspension setting
It's often gas in the system on a BX from leaking spheres too, certainly not normal behaviour and should be cured like you said by bleeding the brakes and replacing spheres if required.white exec wrote: ↑Tue Nov 09, 2021 7:50 am Rear raising when braking is normally a sign that there is air trapped in the rear suspension/brakes.
Kevan
1997 Mercedes C230 W202
2003 Land Rover Discovery Series 2 Facelift TD5 - Daily driver / hobby days and camping.
1993 Land Rover Discovery 200tdi Series 1 3 door - in need of TLC
2020 Fiat Panda 4x4 Cross Twin Air.
1997 Mercedes C230 W202
2003 Land Rover Discovery Series 2 Facelift TD5 - Daily driver / hobby days and camping.
1993 Land Rover Discovery 200tdi Series 1 3 door - in need of TLC
2020 Fiat Panda 4x4 Cross Twin Air.
-
- BXpert
- Posts: 185
- Joined: Fri Sep 10, 2021 6:22 pm
- Location: Osijek, Croatia
- My Cars: 1989 Cimos-Citroën BX 16 TRS
2007 BMW 318D (the "company car") - x 43
Re: Adjusting ride height on normal suspension setting
Thank you all for the excellent advice!
I will probably take my car to a specialist (provided I track one down) as there are lots of issues to adress in addition to the incorrect ride height (leaking pressure regulator, squeaky brakes and a leaky LHM reservoir).
I will probably take my car to a specialist (provided I track one down) as there are lots of issues to adress in addition to the incorrect ride height (leaking pressure regulator, squeaky brakes and a leaky LHM reservoir).
Last edited by Jugostran on Thu Nov 11, 2021 7:11 pm, edited 1 time in total.
Proudly daily driving a 1989 BX 16 TRS since 2021
-
- BXpert
- Posts: 185
- Joined: Fri Sep 10, 2021 6:22 pm
- Location: Osijek, Croatia
- My Cars: 1989 Cimos-Citroën BX 16 TRS
2007 BMW 318D (the "company car") - x 43
Re: Adjusting ride height on normal suspension setting
I have 1989 architect-spec that has standard hubcaps with steelies (though the hubcaps have long since biodegraded and liberated themselves from the car), so accessing the brakes is quite a chore.Kaapelimies wrote: ↑Tue Nov 09, 2021 2:47 pmYes. And to get rid of this, bleed the rear brakes. Engine running, rear wheels on ground, install brake assistant (here we have snow brush or small shovel, to push the brake pedal) and loose a little the nipple in the saddle. There will be a lot of pressure and air bubbles so hold a rag over it not to make a mess. If you don't have alloys of teenage-driver model, then this trick won't work as you need to remove the wheel to get access .white exec wrote: ↑Tue Nov 09, 2021 7:50 am Rear raising when braking is normally a sign that there is air trapped in the rear suspension/brakes. This readily compresses when the brakes are applied, but expands again when the brakes are eased off, which can cause the rear end to rise.
Proudly daily driving a 1989 BX 16 TRS since 2021
-
- BXpert
- Posts: 681
- Joined: Sat Sep 12, 2020 4:04 pm
- Location: Sayalonga, Malaga
- My Cars: 1992 BX19D Millesime
- LHD, NA, AC, RP_5800
1996 XM 2.5TD Exclusive - x 73
Re: Adjusting ride height on normal suspension setting
Put car on highest, jack up a tad further and support, remove wheels, and bleed as described.
Chris
-
- 1K Away
- Posts: 1937
- Joined: Tue Jul 05, 2005 7:54 am
- Location: Usually in the garage
- My Cars: BX GTi, C3 Auto
- x 88
Re: Adjusting ride height on normal suspension setting
Leaking LHM reservoir: is this from the underneath if so it will have rusted through. The rust holes can be repaired with ingenuity but sourcing a replacement is easier.
The Joy of BX with just one Citroën BX to my name now. Will I sing Bye Bye to my GTI or will it be Till death us do part.