Leaking LDS Tank and/or Pump

This is the Forum for all your Citroen Technical Questions, Problems or Advice.
User avatar
AtraHasis
(Donor 2025)
Posts: 14
Joined: 05 Aug 2021, 22:28
x 1

Leaking LDS Tank and/or Pump

Unread post by AtraHasis »

Hi, I’ve recently purchased a Citroën C5 2.2 HDi Exclusive from 2008, that I’m very happy about, but the problem is that the LDS tank and /or pump are leaking. There is fluid in front of the tank and pump, and if I push a tissue between the tank and pump, there is new fluid there from above, that is to say from the tank.
It could of course just be that the leak is from the pump, but that it’s just gone everywhere in the near vicinity.

Is this something that I can fix myself, or do I have to purchase a new pump and tank? And how hard is it to install by myself?

I’ve attached some pictures that I’ve taken of the area.
Attachments
47A59E1C-0FE2-4F87-8B53-0B0EBCCB6BEB.jpeg
03821F8E-4494-45A9-A777-98487AC9C419.jpeg
B6C41049-0B54-4FE4-88F7-35B83D40D20A.jpeg
924EA21D-8792-4DE0-8A04-DB7759FAED7D.jpeg
E7C07F52-2668-437E-9DBD-0C187DF41FA6.jpeg
User avatar
myglaren
Forum Admin Team
Posts: 28404
Joined: 02 Mar 2008, 13:30
x 5570

Re: Leaking LDS Tank and/or Pump

Unread post by myglaren »

Hard to see on your photo's what the source of the leak is but there have been reports of the tank seam splitting.
This is usually when the car is raised with the wheels hanging, the dropped back onto the ground, which sends the fluid back to the reservoir too quickly for the small vent to accommodate, compressing the air in the reservoir and causing the seam to split.
To avoid this it is recommended that the filler cap be removed if the wheels are to be left hanging.
It also helps to put the suspension on high, which locks it in that position and prevents too rapid return of the fluid.
Most MOT stations are aware of this, there is a note on the procedure, but many independent garages and tyre fitters are unaware.
User avatar
AtraHasis
(Donor 2025)
Posts: 14
Joined: 05 Aug 2021, 22:28
x 1

Re: Leaking LDS Tank and/or Pump

Unread post by AtraHasis »

myglaren wrote: 08 Aug 2021, 12:46 Hard to see on your photo's what the source of the leak is but there have been reports of the tank seam splitting.
This is usually when the car is raised with the wheels hanging, the dropped back onto the ground, which sends the fluid back to the reservoir too quickly for the small vent to accommodate, compressing the air in the reservoir and causing the seam to split.
To avoid this it is recommended that the filler cap be removed if the wheels are to be left hanging.
It also helps to put the suspension on high, which locks it in that position and prevents too rapid return of the fluid.
Most MOT stations are aware of this, there is a note on the procedure, but many independent garages and tyre fitters are unaware.
Thanks!
So it’s possible that I just have to change the tank and not the pump?
User avatar
myglaren
Forum Admin Team
Posts: 28404
Joined: 02 Mar 2008, 13:30
x 5570

Re: Leaking LDS Tank and/or Pump

Unread post by myglaren »

As said, I can't discern where the leak is coming from.
If you have had any work done that required the car to be raised with the wheels hanging I would be inclined to suspect the tank.

Try cleaning it up then put some blue roll tightly around the seam, which will show if it is leaking.
Hell Razor5543
(Donor 2023)
Posts: 14260
Joined: 01 Apr 2012, 09:47
x 3275

Re: Leaking LDS Tank and/or Pump

Unread post by Hell Razor5543 »

If it is just a split in the tank make sure to clean up as much of the spilt LDS as you can, while you have good access. It is not unknown for the LDS fluid to get into the pump motor, get mixed up with the carbon powder (which is residue from the motor brushes), and then cause the motor to fail.
Last edited by Hell Razor5543 on 08 Aug 2021, 14:59, edited 2 times in total.
James
ex BX 1.9
ex Xantia 2.0HDi SX
ex Xantia 2.0HDi LX
ex C5 2.0HDi VTR
ex C5 2.0HDi VTR
ex C5 2.2HDi VTX+

Yes, I am paranoid, but am I paranoid ENOUGH?
Out amongst the stars, looking for a world of my own!
User avatar
GiveMeABreak
(Donor 2016)
Posts: 42019
Joined: 15 Sep 2015, 19:38
x 6955

Re: Leaking LDS Tank and/or Pump

Unread post by GiveMeABreak »

AtraHasis wrote: 08 Aug 2021, 12:56 Thanks!
So it’s possible that I just have to change the tank and not the pump?
See my post here - and warning labels for download:

viewtopic.php?t=62058
Please note, I'm no longer active on the Forum, so won't respond to messages.

Marc