If you open the engine bonnet when the engine has overheated or during a fire in the engine compartment, you could come into contact with hot gases or other escaping operating fluids.
Certain components in the engine compartment may continue to move or suddenly move again even after the ignition has been switched off, e.g. the cooler fan.
Make sure of the following before performing tasks in the engine compartment:
Certain components in the engine compartment can be very hot, e.g. the engine, the radiator and parts of the exhaust system.
If engine oil comes into contact with hot component parts in the engine compartment, it may ignite.
Too much engine oil can damage the engine or the catalytic converter.