How do you replace pcv system 1998 S70 Volvo non turbo?

To replace the PCV system on a 1998 Volvo S70 non-turbo, first, locate and remove the engine cover. Then, disconnect the hoses connected to the PCV valve and other components, including the oil trap. Replace the oil trap and install new hoses, ensuring they are secure. Finally, reassemble the engine cover and check for any leaks after starting the engine.