When starting the car the temperature light comes on and for 500-600m of driving the temperature goes right up. Then light goes off and temperature comes right down again. Car is a Sierra 2.3d estate '87. This happens intermittently, im guessing its the water pump not starting up as when the car is running its fine. Anyone else have any suggestions, im guessing Lopez would be the best guy to ask, but feel free to chime in! All those who want to bash the car, sod orf it needs to last me until July/Sept when i get my work bonus and should have enough saved to buy a decent car!