C5 After changing two pipes

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Kumar9989
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C5 After changing two pipes

Post by Kumar9989 »

Citroen C5 2.0i 2001
Chassis number VF7**************[VIN obfuscated, can be read by forum staff]

After changing two pipes one from front absorber mounts and another from HP electric pump to pressure regulator the car front suspension goes up and down every 4seconds. Pipes charged due to leakage at flexible joints to a used ones ( one thick and one more thin one).

After a while we tried to adjust the front height corrector to adjust the height of the front of the car due to the oscillation and the front end of the car couldn’t rise. Rear of car goes up and down when the height setting button is pressed. What could have gone wrong and what is your recommendation to troubleshoot .
Thank you
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Xantia 96 2.0 petrol auto
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Re: C5 After changing two pipes

Post by wurlycorner »

The front suspension up/down can sometimes happen just if it's parked with wheels turned slightly (causes the ARB to twist and then knocks the height sensor just in between two positions which the car then continually over/under corrects for).

I've also had it happen immediately after having had the front of the car off the deck for some servicing work, but driving a short distance has then means it settles down again.

Front suspension now refusing to rise I would suggest is due to having adjusted the front height sensor and put it well out?
Did you adjust it with with the car level, engine running and you (safely) underneath it (e.g car wheels up on blocks/ramps)?
That's the only way to set the suspension correctly by moving the ARB clamp.
If you try to do it by jacking the car up, loosening and moving the clamp, re-tightening, lowering the car down again... You'll end up miles out I imagine.
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Re: C5 After changing two pipes

Post by GiveMeABreak »

As an aside, according to that VIN, your car was produced in March 2002, (RPO 09269), and was probably late registered as the warranty started 8th June 2004.
So this is a C5 5 DOOR SALOON 2.0 i 16v 138 4-SPEED AUTOMATIC GEARBOX

You should also check your actual heights against the reference values in Lexia. Only anything above 10mm out should initially be changed using the ARB height corrector clamps - unless your height correctors are not providing the correct signal through water corrosion.

Here is the height checking procedure for the Mark I:

Official Tools - but you can improvise:
C5 MK II Hub Centre Tool.PNG
C5 MK II Underframe Height Gauge.PNG
Hub Centre ToolUnderframe Height Guage
Measuring the Heights

Wheel Radius Measurement
C5 MK II Hub Height A.png
  • Place tool [ 1] over the wheel screw heads to determine the wheel centre.
  • Measure radius R1 with tool [2] (between the wheel centre and the ground).
C5 MK II Height Front H1M.PNG
C5 MK II Height Rear H2M .PNG
Measuring the Front Height H1M

The front height H1M is measured between the ground and the subframe, at the rear of the suspension arm front fixing yokes.

Calculating the front height H1C
  • H1C = R1 - 140 mm .
  • R1 = Front wheel radius ( mm).
Compare:
  • The value measured H1M
  • The value calculated H1C
Adjust the front height if necessary.
Measuring the Rear Height H2M

The rear height H2M is measured between the ground and the zone "a" on the crossmember.

Calculating the rear height H2C
  • H2C = R2 + 73 mm .
  • R2 = Rear wheel radius ( mm).
Compare:
  • The value measured H2M
  • The value calculated H2C
Adjust the rear height if necessary.
Adjustment using a diagnostic tool
This adjustment is done when the heights measured are within the tolerance of the calculated heights.

Mechanical pre-adjustment
This adjustment is done when the heights measured are not within the tolerance of the heights calculated (± 10 mm).
C5 MK II Height Front Clamp.PNG
C5 MK II Height Rear Collar.PNG
Front height
  • Loosen by one turn the screw ( 1) on the collar (2).
  • Re tighten the screw by hand.
  • To decrease the height, turn the collar ( 2) towards the front of the vehicle.
  • To increase the height, turn the collar ( 2) towards the rear of the vehicle.
  • Repeat the operation until the calculated dimension H1C is obtained (± 10 mm).
  • Tighten the bolt (1) to 0,6 daN.m.
  • Perform the adjustment with tool [ 3] or with tool [4].
Rear Height
  • Loosen by one turn the screw ( 3) on the collar (4).
  • Retighten the screw by hand.
  • To decrease the height, turn the collar ( 4) towards the rear of the vehicle.
  • To increase the height, turn the collar ( 4) towards the front of the vehicle.
  • Repeat the operation until the calculated dimension H2C is obtained (± 10 mm).
  • Tighten the bolt (3) to 0,6 daN.m.
  • Perform the adjustment with tool [ 3] or with tool [4].
Adjusting the heights using tools [3] or [4]
  • Connect Lexia / Diagbox to the vehicle’s diagnostic socket.
  • Go into the menu:
  • Access Suspension ECU / Manual Configuration / Adjust Reference Heights
C5 MK II HeightFront  R1.PNG
C5 MK II Height Rear R2.PNG
Front Measured Height

N.B. : H1M = Front measured height (mm).
  • Calculate (R1-H1M) for the front.
  • Re-enter this value in the diagnostic tool.
Rear Measured Height

N.B. : H2M = Rear measured height ( mm).
  • Calculate (H2M-R2) for the rear.
  • Re-enter this value in the diagnostic tool.
  • Wait for the correction of the vehicle’s height.
  • H1M Measure the rear height.
    Check that: H1M = H1C ± 2 mm .
    H2M Measure the rear height.
    Check that: H2M = H2C ± 2 mm .
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Kumar9989
Posts: 21
Joined: 05 Jul 2014, 10:33
Location:
My Cars:
x 3

Re: C5 After changing two pipes

Post by Kumar9989 »

Thanks for your reply....
We have replaced the hydraulic pump
The problem was solved.
Hydraulic pump faulty
Xantia 96 2.0 petrol auto
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