Help 1.8 GTi Rivage Boiling over at the header tank.

Hi New member as of today, can you help?
Towards the end of last year I bought my Rivage ( Bought off eBay!! )which when warm was pinking really really badly under load. Left it over the winter, started it today and drove to the garage about 3 miles away to have the timing checked. While there as the car was ticking over and the over flow tank started to boil and over flow. The radiator seamed cold and the top hoses felt really solid. Not sure if the pinking & over heating are connected of if it is just a thermostat or water pump failure. Thanks.

yup, sounds like either the thermostat is stuck shut or the water pump is kapput.

it will pink if it overheats.