Where is the PCV valve located on a 1998 Mazda Protege 4 cylinder?

The PCV valve on a 1998 Mazda Protege 4-cylinder engine is typically located on the valve cover. It's often a small, plastic valve with a single hose connected to it. However, the exact location on the valve cover can vary slightly. It's best to consult a repair manual specific to your 1998 Mazda Protege (using the engine code, which can be found on a sticker under the hood or in your owner's manual) for a precise diagram. A quick online search for "1998 Mazda Protege PCV valve location" along with your engine code should also yield helpful images.