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Anyone offer an insight regarding C6 suspension behaviour after jacking?
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nickyg   
Thu May 06 2010, 06:50pm
Joined: Apr 28 2010
Member No: #100
Location: Tyrone
 Hello again everyone,

May I start by thanking Dave for adding some extra suspension related downloads in relation to a comment I made on another thread, and also, more generally, for the excellent facility of this forum!

I have had an unsatisfactory noise from suspension operations, and power steering also, after asked for a brake fluid change from my local garage and instead got a couple of days of faffing about, a broken tpms sensor, and this here noise.

I know the car was jacked (wheels hanging) 4 or 5 times during this botchup and thought this may have led to some loss of LDS or affected the suspension settings in a way that wouldn't be an issue with a mcpherson setup.

I had guessed a top up of LDS may help me cure it (though the cap thingy put me off one saturday morning I decided to go do this!), but upon glancing at the downloaded info I see things such as: "URGENT: remove LDS cap before jacking (wheels hanging)", and also, on another suspension related download, I see a little "nubbin" on diagram near the struts for "repressurising" the system for lowering after jacking

As none of these were heeded previously, could someone with more knowledge than I possibly offer some comment here?

Would there be lasting damage?
Would I remedy all this simply by jacking up again , LDS cap removed, setting down and "repressurising" if necessary?
Has anyone performed these operations themselves, or witnessed them at a dealer or garage?

Thanks!
urb   
Thu May 06 2010, 07:50pm
Joined: Jan 03 2010
Member No: #26
Location: Stockholm
 If you have got air in your hydraulic system you need a diagnostic tool (lexia) to bleed the system.
nickyg   
Thu May 06 2010, 07:58pm
Joined: Apr 28 2010
Member No: #100
Location: Tyrone
urb wrote ...

If you have got air in your hydraulic system you need a diagnostic tool (lexia) to bleed the system.



Thanks mate. Suspected it wouldn't be too simple, as I know Lexia is needed to properly change brake fluid and bleed.

Been putting up with it for a few months now, would this not be good for the hydraulic systems do you think?

Cheers, Nick
C6Dave   
Fri May 07 2010, 07:15am

Joined: Oct 01 2009
Member No: #1
Location: Northumberland
 If you can't get any sense out of the dealers then maybe ask one of the Independent specialists who work on the older Xantia DS etc.

I suspect that many of the 'technicians' in dealerships these days (given their tender years) have little actual experience of working on Hydro Pneumatic systems
Website
gmerry   
Fri May 07 2010, 02:52pm
Joined: Dec 11 2009
Member No: #21
Location: Scotland
 Nickyg, I'm curious as to your statement that the Lexia computer interface is needed to bleed the brakes (or change the hydraulic brake fluid). The C6 has a conventional hydraulic brake system (ie not fully powered like older Citroens) using conventional parts from the major component makers such as Lucas/TRW etc.

There's commonality with other PSA products. Do you know which functions needs to be reset with the Lexia interface after bleeding, fluid change or other hydraulic/mechanical work. At the worst, I would assume that the ABS would revert to fail-safe operation, or in otherwords, the ESP and AB functions would become unavailable. Can anyone confirm this?

Regards
G
C6Dave   
Fri May 07 2010, 05:59pm

Joined: Oct 01 2009
Member No: #1
Location: Northumberland
 I've uploaded some more suspension docs which may help

They are all here: - Click Here -

It would appear that the common theme is that the Cap on the LDS should be removed before any work where the wheels are left 'hanging' is involved.

URGENT : If raising the vehicle on a lift, wheels hanging, remove the cap of the LDS fluid reservoir . refit the
cap of the LDS fluid reservoir, once you have lowered the vehicle .
Website
michaelb   
Mon May 10 2010, 02:52pm
Joined: Nov 17 2009
Member No: #14
Location: London
 Don't MoT garages jack cars up with the wheels hanging to check wheel-bearing play?

Does every hydro-pneumatic Citroën owner have to fear this damage at MoT time?
Dave Mc   
Mon May 10 2010, 04:16pm
Joined: Mar 02 2010
Member No: #64
Location: Weston-super-Mare
 Mine came with a free MOT for as long as I own it but it must be seviced by Howards Citroen. I only cover 6k per year so the servicing will be every 2 years I should not have to worry about 'hanging wheels'. Did other owners get this type of deal?
michaelb   
Mon May 10 2010, 04:30pm
Joined: Nov 17 2009
Member No: #14
Location: London
 Come to think of it, changing a wheel requires the wheel to hang. Surely this problem can't be a normal result from simply letting the wheel hang?
verycleverman   
Mon May 10 2010, 08:49pm
Joined: Mar 08 2010
Member No: #65
Location: Northumberland
Dave Mc wrote ...

Mine came with a free MOT for as long as I own it but it must be seviced by Howards Citroen. Did other owners get this type of deal?


I didn't, but my local dealer is a member of the Citroën Retail Group and so I benefit from the 'A la carte' card scheme giving me a discount on parts and service. Admittedly, I haven't used it for the C6 yet and there is no price listed for a C6 service!

Incidentally, I have always used a Citroën dealer for my MOT since I had my BX fail it's Controle Technique for headlight adjustment when the rear suspension was a little tardy in rising to full height!

Pete
nickyg   
Tue May 11 2010, 07:08pm
Joined: Apr 28 2010
Member No: #100
Location: Tyrone
 In responsive to some of the comments raised. Gerry, From my investigations, yes, Lexia is required to do the job of brake fluid change properly. From several dealers I rang around, and from some other knowledgable forum folk.

The impression I get is that it can be done without, but some elements (valves/abs?) must be conditioned just so with Lexia in order to be perfect.

As regards the wheels hanging issue, I'm sure mine was up and down a few times without the requisite attention to proper procudure, so my guess is that I will probably need a depressurisation, LDS change and repressurisation. The car was perfect before that so am ruling out any miscreant wheel travel sensors, spheres, pump degradation or the like.

One wheel raised on a jack is fine (for changing a wheel).
 

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