2005 C5 LDS

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Bikernerd
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2005 C5 LDS

Post by Bikernerd »

Hi guys, wondering if you can shed some insight for me..

I have a very smell yet very irritating LDS leak somewhere around the tank. Looks like it's dropping onto the top of the pump from somewhere above, I've checked all the obvious hoses and they seem okay. And my mechanic had all the wheel arch off and had a look (replaced a clip he says) is there any where I should check first? Or is it a case of follow all the pipes until I get it.

Cheers lads.
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GiveMeABreak
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Re: 2005 C5 LDS

Post by GiveMeABreak »

Hi and welcome.

Have a read of this:

viewtopic.php?f=3&t=62058

If your LDS tank has become weakened due to tyre fitters or mechanics unaware of the correct procedure for raising the car where the wheels will be suspended, then you may have the beginning of your LDS tank bursting. It can weaken over the years if this procedure is not followed. It will be weakened along the seam around the middle of the tank.

I would tend to it sooner than later, because leaking LDS will drop onto the pump housing and can enter the motor - mixing with the carbon from the motor brushes and causing the pump to overheat and blow a fuse. Also it will likely be an MOT (or the Irish equivalent) fail if leaking fluid.
Gibbo2286
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Re: 2005 C5 LDS

Post by Gibbo2286 »

Check around the LDS reservoir for splits at the seams, some were prone to failure.
Bikernerd
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Re: 2005 C5 LDS

Post by Bikernerd »

Cheers for the replys lads, I thought it was the mk 3 or x7s that had that issue? Or is it all c5s and the x7s were just particularly susceptible to it?

Also.. Anyone know a good place to pick up a tank 😂 not sure how much I'd trust ebay spares now
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GiveMeABreak
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Re: 2005 C5 LDS

Post by GiveMeABreak »

It’s not limited to the X7, the C6 also, but has also happened to earlier C5 models.

Part number is 4009S4 for the LDs tank - these are the same part on the MK IIs for all models. A new one from Citroen costs £92.71inc.VAT. But some second hand ones are nearly that price, plus you don't know the condition of a second hand one structurally. As you will need to drain and replace the LDS, you should consider that you can't re-use the LDS fluid so will need to replace that at the same time - so it is a risk if replacing with a second hand tank.
Bikernerd
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Re: 2005 C5 LDS

Post by Bikernerd »

VF7**************[VIN obfuscated, can be read by forum staff]
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GiveMeABreak
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Re: 2005 C5 LDS

Post by GiveMeABreak »

Confirmed as correct part number 4009S4:
LDS Tank C5 II.PNG
Bikernerd
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Re: 2005 C5 LDS

Post by Bikernerd »

I was hoping it wasn't the tank. Lds here is at least €26 a liter. This is going to be expensive... Would I need to prime the pump after swapping tanks over?
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GiveMeABreak
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Re: 2005 C5 LDS

Post by GiveMeABreak »

I would certainly confirm the leak is the tank before embarking on this operation.

There are several operations that will need to be done: Depressurising the Suspension System, Draining the system, replacing the tank, then refilling, repressurising and bleeding the system.

You can't reuse the LDS you recover (risk of contamination of the system) so you need to confirm source of leak and that it isn't a hose for example.

I can help you out with the various procedures, but will take a little while to assemble and type up here. So obviously I'll only want to do this if that is the issue. :-D
Bikernerd
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Re: 2005 C5 LDS

Post by Bikernerd »

Absolutely, I'll be giving it a thorough coat of looking at tomorrow, hoping it's not the tank because that's a garage job. I don't have anything to re prime the pump..... Just thinking though, when I take the cap off there is a release of pressure, am I right in thinking if the tank had failed it wouldn't hold pressure.

Gonna take all the liners off tomorrow and have a root around
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GiveMeABreak
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Re: 2005 C5 LDS

Post by GiveMeABreak »

The LDS tank is under slight pressure, but that’s why I suggested you have a good look for other causes. It may be one of the return pipes for example.

The system can be pressurised with as little as 7 PSI. Without the tool, others have utilised a bike inner tube with the valve part, placing it over the tank neck, holding it in place and using a bicycle pump to get a bit of pressure in. It only needs a little then the pump will do the rest. But it must be bled, which is easy following the procedure and needs no special tools.
Bikernerd
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Re: 2005 C5 LDS

Post by Bikernerd »

Ahh perfect, I can jury rig something then. I'll get to checking it out tomorrow and report back. Cheers for your help man.... Bloody cars 😂
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Re: 2005 C5 LDS

Post by Hell Razor5543 »

I got an LDS reservoir car from a scrappy for a quid or so, a car tyre valve (for free) from a local tyre place, drilled a hole in the cap, and put them together. A couple of strokes with a bike pump should pressurise the reservoir nicely (I haven't had to use it yet).
Bikernerd
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Re: 2005 C5 LDS

Post by Bikernerd »

I was thinking of doing something similar with a cap from my current tank if I had to get a new one, assuming the new one comes with a cap.
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GiveMeABreak
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Re: 2005 C5 LDS

Post by GiveMeABreak »

The cap is sold separately, but one would hope it came with the cap for that price.