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C6 Tyre Valve failure |
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NewToMe
 
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  Member No: #127
Location: London |
I've tried a few times to load pictures of the process but the forum software just redirects me to a blank page. Here is a link to the repalcement valve stem on ebay: - Click Here - That is what I purchased, but I suggest you go for a Ford one: - Click Here - From the pictures you can see the bit you need is identical. Once the tyre is off. to do the replacement you will need a deep 12mm socket and a T6 torx bit. I greased the stem and the interal washer too. The main thing is to be gentle, the alu can't take much force coming off or going on, they say 5 or 6 NM in the Citroen documentation, so a Torque wrench that can measure small forces would be useful if you don't trust yourself. |
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C6Dave
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    Member No: #1
Location: Northumberland |
@NewToMe, the images will simply be to large so are rejected by the system, try and reduce the file size The sensors aren't a 'Citroen' made part but are supplied by Siemens and used on lots of other cars and whilst the manufacturers 'part numbers' may vary, there a standard unit Your first link points to the 'repair kit' mentioned in this post: - Click Here - |
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NewToMe
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Member No: #127
Location: London |
Thanks, I will try to reduce the sizes, they vary from 100 to 400 K. The repair kit on your link is just the valve centre and the nut + washer, it does not include the valve stem which is the bit that seems to fail, at least it was on my car. In the diagram the sensor and the stem are shown as one unit - part "A" which Citroen charge I think £65+ VAT for. Other sites sell that kit too, e.g. - Click Here - but it's not much use. There seems to be an OEM supply from VDO/Siemens or Schrader or whoever which sells them as two parts, the guy on ebay must have access to this channel. But he is charging £20 for something which costs a few pence to make... Sadly I found the link to the Ford one after I had paid my £20. I will squash the pictures and post them. |
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NewToMe
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Member No: #127
Location: London |
A five year old valve...    The replacement parts  The sensor with the new neck installed, just a simple push fit and rotate  The inside of the rim that will accept the assembled sensor.  The fully assembled replacement with the new neck and the torx tightned to hand tight. The oval washer and seal go on the inside of the rim.  The new valve exterior  The new valve interior  |
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C6Dave
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Member No: #1
Location: Northumberland |
Thanks for posting that, it makes far more sense now when you see the pictures. | ||
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Leo
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  Member No: #94
Location: Belfast |
I really do not think these valves are a practical proposition for long term ownership. After the hassle of three failures on a car that is now only 2 years old I have had them removed, the system disabled and ordinary valves fitted. No problems since. Leo |
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michaelb
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 Member No: #14
Location: London |
Thanks for your post - this is useful information. | ||
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gmerry
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 Member No: #21
Location: Scotland |
Leo, I think you have taken the sensible approach. Certainly, some manufacturers are now pushing an indirect pressure measurement system. This uses existing ABS sensors and possibly some chassis mounted accelerometers to "infer" that a tyre pressure is sub-obtimum. I guess a flat tyre has a smaller effective running radius for example. In reality, that is all drivers really need: something to telll them that a tyre is very flat and some action needs to be taken. So I would predict that the direct wheel mounted system will die out in a few years. Regards G |
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tonyrome
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 Member No: #15
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Leo wrote ... I really do not think these valves are a practical proposition for long term ownership. After the hassle of three failures on a car that is now only 2 years old... You're probably correct but it's not a universal problem and could be down to the environment the car is stored in. My car is over 4 years old and not only are the valves original, they are still in good condition, with no visible corrosion! I took them off recently, when swapping back from my winter wheels, to check them and re-grease and they were absolutely fine. |
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gmerry
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Member No: #21
Location: Scotland |
This morning had the front tyres replaced (Falkens in place of the Michelin OEM) and as part of the tyre change, I planned to replace the valves as well. Not replacement of the transmitter, but just the alloy stem that screws into the wall of the rim. All went well with the tyre change. Fitter was happy to do this and we planned to grease the new stem with "red rubber" grease to prevent corrosion. However, hit a snag in that there is a tiny torx screw that fastens the transmitter to the valve stem. The head must be T7, possibly T6 or T8. Its so small impossible to measure without some magnification. Anyway, as tyre fitters do not carry such tiny tools, I suggest a visit to your jeweller or mobile phone repair man before replacing your valves. CONFIRMATION OF TOOL SIZE : TORX T6 Picture of the screw head 
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C6Dave
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Member No: #1
Location: Northumberland |
I'm sure I have one that small as I bought a set of 'security' torx tools (ones used with electrical appliances with 'pins' in the centre of the hole to stop you interfering with them  They go down as far as CR-VT-8 which is tiny Nearly sure they came from Maplin. |
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gmerry
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Member No: #21
Location: Scotland |
Hi, I've edited my picture caption and confirmed that the screw size to secure the transmitter to the valve core is a Torx T6. Point to point dimensions for this size is a mere 1.7mm. Suggest you keep one in the car (along with a spare valve) if travelling abroad. Regards |
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Ped
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 Member No: #82
Location: Maidenhead |
I've also had my sensor valves replaced with normal valves. Much easier and I prefer to check my pressures myself anyway. Cheers |
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datmbn
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 Member No: #193
Location: MOTALA |
There is an simpel way to fix this with the wheels still on the car Just get hold of an ordinary valve and cut away all of the rubber you will be left with an thread on top of an pipe with D=6 mm then just take an drill and drill with 6mm into the valve on the wheel Then make sure that the pipe of the new valve fits into the hole you just drilled Then just glue the valve to the part at the wheel with some epoxy |
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C6Dave
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Member No: #1
Location: Northumberland |
?? what happens on the motorway at 70+ mph or the autobahn at higher speeds if the epoxy fails and the valve blows out To me your suggestion sounds extremely dangerous and is not to be recommended at all |
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