question of expertise 106 gti overheat.

When I use it without normal compression, the temperature indicator of day or night is almost based on the line of the last quarter. In a little compression, the temperature comes on directly to the last quarter and the fan comes on.

When I wasted my car, the light goes off with the temperature indicator, which shows a slight drop, and it is still near the last quarter line (My speed is 80 - 90 km continuous).

The temptation is the least likely to be broken because the fan hurts where it needs to turn on,

I do not think that there is a problem in the thermostat, but only when the engine warms up from the inlet pipe of the coolant to the radiator, there is a constantly rustling noise, when I play it, it is increasing or decreasing, but there is no interruption.

Could this be because the hose that transmits the coolant to the radio is clogged, or is it a circulation pump?

Does being a single fan have an effect on this?