WARNING: DO NOT attempt to open the cooling system when the engine is hot. The refrigerant in the system is under pressure and can burn you unexpectedly. You should wait a few hours after turning off the engine and proceed with the installation after the engine and pipes can be touched without burning.
Radiator electric fans can be removed without first removing the radiator. Disconnect the wires from the fan, remove the fan shroud mounting bolts and the fan shroud itself. After that, the fan blades can be removed by unscrewing the bolts securing them to the shaft, and the motor can be separated from the casing.
To remove the radiator:
1. Place a clean, dry container under the radiator, remove the drain plug, and drain the coolant from the radiator.
2. Disconnect the electrical contacts from the thermal switch and the cooling fan motor.
3. Disconnect the upper cooler hose from the upper radiator tank and the lower hose from the connecting pipe with the water pump. Disconnect the expansion tank hose from the coolant reservoir.
4. Remove mounting bolts and heatsink with fan. The fan can simply be removed by unscrewing the bolts on the back of the radiator.
When removing the radiator, try not to damage the radiator cells.
5. Pay attention to the rubber mounts or pads, they must be re-installed exactly in their places. Due to them, the vibration transmitted to the radiator from the engine and the car as a whole is damped.
6. Check hoses for damage, leakage, or physical wear. If necessary, replace them. If the radiator cells become dirty, the dirt particles can be washed out with low pressure water. The honeycomb can be mechanically cleaned with thin, non-metallic objects of suitable size.
7. To install, place the heatsink in place, making sure the rubber pads or washers are in place.
8. Install the retaining bolts, tightening them to 10 Nm.
9. Connect the hoses in place using new hose clamps.
10. Connect the wires to the fan terminals.
11. Double check the drain cock and making sure it is closed, fill the cooling system.