Hydraulic repair failed on steering

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white exec
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Re: Hydraulic repair failed on steering

Post by white exec »

I have bought (bearings) from Simply Bearings, and found them very good.
The Polymax site might help you identify what to go for. Their quantities are not tiny, but unit price is reasonable, I found.

belaprops
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Re: Hydraulic repair failed on steering

Post by belaprops »

After sitting on the phone for awhile I think I got the citroen part number.
The technician quoted 7.5 mm and 8.8 mm, which is very close to the 8 and 9 mm adviced earlier in the post.
Just for reference here are the part numbers
98326 48280 is 7.5 mm
98326 48080 is 8.8 mm
Around 50 pence each, next day pick up...
Let's see if they work as the were not specified as being the o rings, but logic dictates I could be them.

belaprops
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Re: Hydraulic repair failed on steering

Post by belaprops »

Peugeot 407 has the same pipes and cheaper then citroen. Have not checked this but it's an intresting finding by another C5 owner who fitted it. I thought I share it

belaprops
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Re: Hydraulic repair failed on steering

Post by belaprops »

Well no luck.
Seems that replacing o rings with original ones from citroen dies not seal the pipe connection.
I'm wondering if these pipes get seal with a sealant or if they just put the wrong o ring on there.
The pipe went in rather smooth , where the high presure pipe needed assistance of the bolt tightening.

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KennyW
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Re: Hydraulic repair failed on steering

Post by KennyW »

Bela,
It should be a snug fit for both pipes, I got mine from Simply Bearings and I used 8mm x2mm, 9mm x2mm , grease well to aid fitting. If the HP is snug it'll leak from LP because of the fit.
The pipes can be bought but at a price £100 plus for LP and £225 plus for HP.
Put up your VIN for Marc to get the correct Part No for your model
Kenny

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Re: Hydraulic repair failed on steering

Post by GiveMeABreak »

Bela - just to follow on from what Kenny said - more than happy to supply live part numbers and parts diagrams, but as we are charged for this now by PSA, we ask for a relatively very small donation of £10 min. for this data, which will cover you for any further parts enquiries for up to 2 years. This is something we have to ask of all members that want live data direct form PSA now. If you need this info from me, just follow the link:
A response to your question by a forum admin will require detailed vehicle information that requires you to have made a current contribution to the Forum.
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belaprops
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Re: Hydraulic repair failed on steering

Post by belaprops »

Thanks guys,
I don't understand what Kenny means, if the HP is snug, ie tight it will leak thru the LP.
As I mentioned I got the original parts from citroen dealer. So with two new o rings it still leaks. More then before which would confirm it's the LP as this was fixed with a hardened sealant.
Don't worry about the part numbers, I got them already. Covid has put me in a very difficult financial position so I can't yet donate.
Thanks for the help again

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white exec
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Re: Hydraulic repair failed on steering

Post by white exec »

I did say that PSA O-ring sizes tended to be somewhat on the lean side, and ageing joints, which become less snug or undergo some wear, don't help. There are several examples I can think of where a slightly chubbier O-ring produces a good seal, but the standard size does not.

Suggest you lay in a few slightly over-size rings. Stick with the same internal diameter, but go for fractions of a mm up on the thickness. Instead of 2mm, go for 2.20, 2.25, 2.30, for example.

Many of these grooves are rectangular/square in section. A new O-ring when newly fitted ex-factory probably never filled the groove - i.e. became square-section itself, but just pressed on the the four surfaces. A slightly chubbier ring will be made to 'fill' the groove, and also be 'in compression'. Rubbers/composites in compression tend to have a longer life.

My advice is just to lay in a small stock, and go for the very best fit. The only sealant I'd personally recommend is Hylomar Blue, on thoroughly cleaned and dried surfaces. It will also lubricate the O-ring as the joint is fitted, but don't let it go tacky - assemble immediately. (Letting it go tacky is how it's used on flat gaskets/joints; it then behaves like a post-it note.)

belaprops
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Re: Hydraulic repair failed on steering

Post by belaprops »

Thanks Chris for the great advice.

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GiveMeABreak
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Re: Hydraulic repair failed on steering

Post by GiveMeABreak »

I think I recall doing the same when having the third :shock: rack put on - went for slightly larger O rings.

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KennyW
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Re: Hydraulic repair failed on steering

Post by KennyW »

Bela,

I seem to recall the original sizes I was told were 7.8mm x 1.8mm and 8.8mm x 1.8mm but follow Chris and Marc's advice re thickness size the tighter the fit the better. Also once fitted try not to move the pipes as this seems to affect the seal.

Good luck, if you problems getting seals I have some spares which could be posted down.

Kenny

belaprops
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Re: Hydraulic repair failed on steering

Post by belaprops »

Yes Kenny you are right, the thickness was 1.80 and for the high presure 1.95.
Calipers are handy sometimes.
Can't find any 2.1 and 2.2, only 2.0 and 2.5
I think I have gone thru every retailer by now

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GiveMeABreak
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Re: Hydraulic repair failed on steering

Post by GiveMeABreak »

I also got mine from Simply Bearings:

https://simplybearings.co.uk/shop/

belaprops
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Re: Hydraulic repair failed on steering

Post by belaprops »

Found a retailer who do single rings , not all the sizes but 8x2 an 9x2
Let's see if the 0.2 mm will seal the gap.
Wasting so much fluid with testing different sizes, not fun when it's 5 pounds a litre.
https://www.georgelodgedirect.co.uk/

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white exec
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Re: Hydraulic repair failed on steering

Post by white exec »

This was the previous thread (and calculation) of snug-fit O-rings:
viewtopic.php?p=642897#p642897.

Findings were
HP: 8mm ID x 2.2mm thickness
LP: 9.02mm ID x 2.2mm thickness
from the Polymax range.
You might find these elsewhere too.