LHM leak from unknown unit.

pridz · Post by **pridz** » 29 Jan 2011, 18:52

Hi all,at christmas I changed the clutch on my xantia td sx,not as bad as I wa
s expecting however I now have sprung a LHM leak.It seems to be leaking from the unit next to where the clutch cable comes through the bulkhead.It has taken me several hours to locate what I hope is the leak but have yet to fix as access is such a problem.Could someone please name the unit for me as I would like to know what I am working on,many thanks in advance.

andmcit · Post by **andmcit** » 29 Jan 2011, 19:04

This sounds like the brake valve/dosuer - they can leak profusely too:
http://cgi.ebay.co.uk/CITROEN-XANTIA-BR ... 2a02161675

Andrew

Xaccers · Post by **Xaccers** » 29 Jan 2011, 19:09

Check the driver's footwell carpet and foam underneath incase it's leaking into there too which isn't nice.

VertVega · Post by **VertVega** » 29 Jan 2011, 19:14

Some more pics from FCF ---> Xantia doseur valve.

VertVega · Post by **VertVega** » 29 Jan 2011, 19:42

Just remembered another possible leak source

Is the front anti-sink valve located right below the doseur valve, in a RHD Xantia? (It is in a LHD)

If yes then the seal at one end might also develop LHM leaks

andmcit · Post by **andmcit** » 29 Jan 2011, 20:04

It lives over beneath the main LHM reservoir - guess on a Lhd it would
be below the doseur valve.

Andrew

VertVega · Post by **VertVega** » 29 Jan 2011, 20:12

Thanks andmcit

(Yes, below doseur in LHD).

pridz, forget about the anti-sink valve option

pridz · Post by **pridz** » 29 Jan 2011, 20:23

Thank you very much for the prompt reply,could I have damaged the valve whilst changing the clutch? And are there any does and donts when fitting a new dosier valve.Cant tell you how much confidence it gives knowing you guys are about to give the likes of myself the benefit of your done it before knowledge.Thank you very much

VertVega · Post by **VertVega** » 29 Jan 2011, 20:59

Doseur is a rather "tough" component that it can not be easily damaged

but the rubber pipe(s) connected to it (one or two) can be

Easy to fix.

But, It would be wise to check first what Xac has suggested:
"Check the driver's footwell carpet and foam underneath incase it's leaking into there too which isn't nice."

If you have a wet carpet then it's the rubber cap which can be seen in the link,
I have given above, with item number 6.

Pleiades · Post by **Pleiades** » 29 Jan 2011, 23:09

I would expect this to be no more than a split return pipe from the doseur valve, or as I prefer to call it, the brake valve.

As others have stated, this valve is very robust, leaking into the car and soaking into the carpets will indicate a leak from the end cap, but leaking externally, although possible does not happen very often.

What sometimes happens and is more likely in your case, is that over time the return pipes (rubber) go very hard, when working in this area, movement will crack the pipes.

This can be sorted with rubber fuel pipe and simple hose clips, a cup of tea and some choccy biccies also helps.

Regards
Martin.

pridz · Post by **pridz** » 06 Feb 2011, 21:07

Martin ,you are indeed correct as to the split return pipe.It was hard enough to remove but as to replacing,I am indeed struggling.Would anybody be able to give me the correct inside diameter of the return pipe and any little tips or tricks as to how to get it on.Many thanks for all the replies, until I read the posts I didnot know there was a rubber pipe there as it is so tucked away.Thank you all.

andmcit · Post by **andmcit** » 06 Feb 2011, 21:26

Carefully get a small eggcupfull of just boiled water handy in the vicinity of
the brake valve and LHM pipe and immerse the shortened return pipe
into it for a minute or so. The rubber of the pipe will become more pliable
and happier to stretch over the male feed pipe.

It's imposible to get the LHM pipe totally dry of water but a flick/shake of the
end after removing it from the boiled water will help. The only downside is
when the pipe cools down and tightens up it may be aged and split again.

Andrew