thanks to all ! the problem did indeed reside behind the dash where a lead had become detached from the instrument. have spent the weekend exploring the backroads of Oxfordshire with a silly grin ''old fart'' on my face. the gauge now steady on the hot side of normal. I presume that is to be expected given unleaded fuel?. As i said the head has been hardened but I was wondering if I should also use the Redex fuel additive? Was interested in tmg531's assertion that this is the 'best model from the best year' could you perhaps be a little biased or are you just trying to stir up some controversy?
