Opel Corsa Cylinder Head Gasket Replace/Remove

Fan Of Radiator Starts When Ignition Key Is On.earlier Itused To Start When Engine Gets Heated.this Problem Has Been Started After I Given...

Wt R Important Thing To B Care During Change Of Head Gaskit So That After Change No Problem To Car.is It A Costly Process

Opel Astra 96 Model Headgaskit And Thermostat Are Same Are Not Of Corsa 2000 Model.can I Change By Astra's.and How To Know Head Gaskit Blown...