Hello everyone, my partner's 0.7 has recently had a fair amount of work (new turbo and radiator). She usually only drives around town, but she decided to bite the bullet and take it on the motorway. All fine, temperature fine, until we pulled off and were stationary at the lights. The temperature gauge shot up to the red. While driving on to find somewhere to stop, the needle went back to normal, and so forth. Bonnet popped and we found the coolant in the header-tank boiling furiously. Any ideas?