The turbine is attached to the water pump.
If the thermostat is open and water is not flowing, the main cause is the water pump.
If it is only overflowing into the reserve tank, a radiator cap change might help. Are the rubber seals on the cap worn or damaged?
Overfilling the reserve tank would make it overflow when the engine is running.
However since the temp gauge is showing high, It should not be the cap.
Remove thermostat and reinstall the hoses. Top up the fluid and start engine with radiator cap off.
If you can see the water moving in the radiator, it is flowing, if water remains stagnant, it is not.
Reving the engine should make the flow faster.
When an engine overheats, it should be repaired asap, failure to do so can cause a lot of damages if and when the coolant dries up while driving.
Wednesday, July 16th, 2008 AT 7:54 AM