Following finding that the Speedo was seized, I had to take it apart and managed to free it up with a judicial application of penetrating oil at the input part and it freed up .
To take the speedo apart I removed the two screws at the rear and then pried the retaining tabs on the bezel back slightly to allow me to release the bezel which is a bayonet fit. This was quite hard as it was corroded on.
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| Remove these two screws from the rear to start taking the speedo apart |
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| Pry the 6 retaining tabs out a bit to allow the bezel to twist and remove |
I then removed the glass and an inner bezel and carefully removed the speedometer innards to allow me to sparingly lubricate it.
Picture 11 after removing the glass remove the inner bezel
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| After removing the glass remove the inner bezel |
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| Innards removed |
I carefully reassembled the unit cleaning everything as I went. I then tested the unit with a speedo cable and a hand drill to make sure it operated correctly.
This activity is aimed at getting the car back on the road, in the meantime I'll look around for a secondhand speedo and get one refurbished by one of the specialist Smiths Instruments reconditioning companies as new speedometers are no longer available for the GT6, although there is a rarely available new unit on ebay at the moment it is for a non overdrive car and has a different ratio and the milometer and speed readings would be inaccurate.
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