Rear LHM leak

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citronut
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Re: Rear LHM leak

Post by citronut »

c.morewood wrote:So nobody has tried this yet?
Do the washers need to be of a special material to resist LHM?
If indeed they make a Dowty washer that is of the correct size, this could be a very cheap answer to the failing rear cylinders problem.
i dont think this will work as firstly the sphere seals against the face of the seal and not the inner surface,

so yes the rim of the cylinder is just there to keep the seal in place,

secondly the seal is holding around 2.600 psi so IMO i dowty the dowty washer will help seal the sphere
Regards, malcolm.

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Re: Rear LHM leak

Post by c.morewood »

It seems that from reading this pdf file, the seal will hold almost 10 times that pressure 20,000psi.

http://www.google.co.uk/url?sa=t&rct=j& ... 0087,d.ZWU" onclick="window.open(this.href);return false;
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Re: Rear LHM leak

Post by c.morewood »

c.morewood wrote: However on taking the car out of the garage for the 1st time since replacing the O/S cylinder I notice that the O/S rear is sitting about 2in below the N/S.
,
After taking the car for an 8 mile run yesterday it seems that the height imbalance has disappeared... don't know why it appeared or disappeared.

Still investigating Dowty seals.

Fantastic to have a car back that has decent suspension and power steering and will go around corners!!!! :-D :-D :-D
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Re: Rear LHM leak

Post by CitroJim »

Chris, Excellent stuff :-D Delighted all is now good after all the very hard work you've done recently...

These Dowty Seals are very interesting and very much worth investigating...

Small versions are used on some sump plugs...
Jim

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Re: Rear LHM leak

Post by c.morewood »

Just tying up this thread:
Dowty seals Work http://www.frenchcarforum.co.uk/forum/v ... =3&t=46231" onclick="window.open(this.href);return false;
and Suspension cylinder unions
http://www.frenchcarforum.co.uk/forum/v ... =3&t=46395" onclick="window.open(this.href);return false;
C5 ones fit
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Re: Rear LHM leak

Post by philthyD »

Chris.......... how did you remove the sphere (me bit of a noob) i have been hanging from it for about an hour and can not for the life of me figure out how i'm going to turn it.

my c5 has never had any suspesion repairs in its 14 year life so you can imagine how stuck things are.
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Re: Rear LHM leak

Post by c.morewood »

On the Xantia, you have to "crack" the sphere whilst pressurised with the suspension on high.. and then unpressureise, by setting the suspension on low and release the remaining pressure out with the bleed screw. Then you can unscrew the spheres easily.
You can't shift the spheres unless they are held by the pressure as they move too much.
Not sure how it works on a C5.
I used the sphere tool thats available on EBay ( http://www.ebay.co.uk/itm/Citroen-spher ... 19e77c29aa" onclick="window.open(this.href);return false; )
It seems to work pretty well and gets all but the really stubborn, rusted in center spheres out, I had to take the bracket off for that.
I hope this helps,
Chris
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Re: Rear LHM leak

Post by philthyD »

ahh, I was unable to do this as when it was on 'high' or even normal ride height it was leaking quite severely.

spraying, is the term used i beleive :(

however the cylinder is now completely dry of fluid as the only part left to remove is the sphere and then the whole cylinder is free.

might invest in a tool, is there a similar tool such as a oil filter extractor, that will do the job?
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Re: Rear LHM leak

Post by Hell Razor5543 »

Click on the link in Xacs' signature, as he has a design for a DIY sphere removal tool that works. However, with the cylinder in the state you say, it probably will need some percy-whatsits.
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Re: Rear LHM leak

Post by c.morewood »

If you decide you need some Dowtys for the repair...I've got a few
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Re: Rear LHM leak

Post by philthyD »

Thanks Chris, I'll be finishing this off at the end of the weekend, I have a loan car to tide me over till then (VERY short of money at the moment) and again thanks everyone, you've been most helpful.
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Re: Rear LHM leak

Post by RichardW »

Getting the sphere off with no suspension pressure may be difficult, verging on impossible, if it's tight. You will need to invent a way of getting hold of the ram, or jamming it aginst the car somehow to stop it turning. The metal bracket round the ram is not very strong and will just bend if you apply a lot of turning force to the sphere. You may have to cut off the ram bracket, remove the strut complete so you can attack it on the bench, and then weld the bracket back on. Getting the ram out is another world of pain due to the clip at the other end seizing in - removing the arm is the easiest option... :roll:
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Re: Rear LHM leak

Post by philthyD »

If I remove the arm, I can just put it on the bench as it is can't I? I do only have the break assembly to detach and the arm will dismount everything else is off (overkill maintenance)
Would another option be to just reassemble and re-pressurise once the new pipe arrives, and then sort of restart the job? In the meantime does anyone have any pictures of all the seals in place within the cylinder so I know what I'm doing when I do get it off?

Thanks for the advice
'01 Cit C5 2.2HDI SX +toys *rescued and undergoing dpf removal*'95

Nissan micra*crashed*
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1979 Datsun Cherry*sold*
'95 306 Dt *written off*
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Re: Rear LHM leak

Post by RichardW »

Can I just re-cap? What car are you working on? What fault are you actually trying to fix? I have a suspicion it's a C5 in fact? In which case they are somewhat different - yet still the same as they have the same (or similar) pin in the arm, and it likes to rust in just as much, if not more, than the Xantia #-o
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Re: Rear LHM leak

Post by philthyD »

Original fault was a gaitor leak, however while replacing track rod ends the pipe end fitting (corroded) burst a leak. And yeah c5 2.2 hatch (51 plate).
Pin popped out after a quick wd40 and a harsh pull with pliers. The only problem I now face is what is going to be easier to remove sphere before continuing, my idea was to replace the burst pipe and put the car back on its wheels then remove as per usual while under pressure.
'01 Cit C5 2.2HDI SX +toys *rescued and undergoing dpf removal*'95

Nissan micra*crashed*
'96 Nissan micra*crashed*
1979 Datsun Cherry*sold*
'95 306 Dt *written off*
'97 306 Dt *aux belt destroyed timing belt, dead*
'98 306 Dt *part ex'd*
'99 406 2.0HDI exec est *dead*
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