I have got Astra H, Z16XEP engine.
The engine operates in very high temperatures originally - 105-113°C.
I want to lower a bit temperature the radiator fan kicks in: currently 113°.
How that could be done? Maybe reprogramming / programming? Opcom, Tech 2? Or replacement of some of car's modules?
Most fans have a switch fitted in the cooling system - change that for one of a lower temperature rating. They are often the same size.
However, you could do what I did and fit a tank thermostat around one of the radiator hoses then adjust it until it comes on at the temperature desired. Trial and error here as the ambient temperature under the bonnet varies so you have to experiment.
