Cayman S (987) F6-3.4L (2008)
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Valve complete with screw -1 to 7- has to be replaced if:
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The wheel electronics are removed
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The self-locking -1- fastening screw is loose
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The bead seat sealing ring -6- is porous or damaged
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The valve body -7- is bent
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The union nut -4- is loose.
The wheel electronics -A- must be replaced if:
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The housing is visibly deformed
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The filter surface (square, porous section on back of wheel electronics) is so badly soiled that it can no longer be cleaned by wiping
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Tire sealant (tire sealing liquid) has been used
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The service life of the battery has expired
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There is a fault within the wheel electronics.
After removal of the tire, the wheel electronics -A- can be seen at the valve in the outer rim well base.
1. Release wheel electronics from valve using a Torx socket screwdriver T 20 (if necessary, counter with a suitable assembly pin, e.g. steel pin
diameter approx. 1.8 mm in bore at valve foot) and remove it.
2. Then unscrew union nut and remove valve.
Installing wheel electronics
Note:
Carry out the tightening procedure to the specified torque for the valve in the rim once only. Remove the assembly pin after fitting the valve. The tire
can be damaged if the assembly pin is left in the valve.