So now I have read almost every contribution here from the hot motors under load and mine also starts with it. As soon as I drive faster than 150 km I can also take the temperature indicator as a speed meter so moves that at speed / brakes. Was now in 3 workshops and everyone says something different. *HEUL* First said the visco will be it, the second said it CAN only be the water pump and the last said 1.termostat or cooler sits you. e would have been my favorite, whereby the explanation of the 2 workshop with the water pump seems to me most plausible. The Visko always turns with me (yes, I know all viscofans always turn with) but can not hold Him tight so he always cools down. But the water pump does not bring the water in motion anymore and therefore it can only be the water pump! What do you mean??