Where is the thermostat on astra 1600 8valve 2001 model?

On a 2001 Astra 1.6 8-valve model, the thermostat is typically located on the engine block, near the water pump. To access it, you may need to remove the air intake hose and other components for better visibility. It's usually housed in a housing that is connected to the upper radiator hose. Always consult the vehicle's service manual for precise location and replacement instructions.