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Does the XJ12 use the same expansion tank as the six cylinder car? SNG Barrett website implies it does by not having a separate V12 listing but I want to confirm. Thanks, John
By expansion tank are you referring to the engine coolant system ?
There is some experience issues and resolution on this from others
I do not have the V - 12 and the V - 12 has a proper / real world coolant service level procedure
There was some issues with the coolant level sensor ( different type connector specific ) especially with the X308 ( V - 8 ) that does not have the V - 12 ( out of V - 12 engine production )
Did you have a problem with your expansion tank? Mine split it's seams, on a very hot day, a couple of years ago, it turned out one of the thermostats had not been correctly seated and that possibly caused an over heat, interestingly the pressure relief cap didn't vent although the tank split it's seam.
I had heard rumours of the coolant tanks in our cars having this problem so to prevent it in future I secured the two halves of the tank with S/S machine screws and nuts all around the perimeter of the tank about an inch apart and so far so good with two new thermostats correctly seated. See pix.
Cheers,
Jeff.
I separated the tank halves, they were bonded together with a soft sem setting sealant. It had split along the edge where the bleed hoses fit.
My solution using S/S screws and nuts on the new tank before I installed it.