Wanted to replace the pcv valve as a preventive maintenance item, but it looks like it's going to be a major pain. After replacing the pcv valve, inspect every vacuum line you touched or moved Reinstalling the old retainer will reduce airtightness
PCV Valve Explained: What It Does, Signs of Failure, and How to Replace
Make sure that the retainer alignment mark is directed as shown.
One tutorial on a youtube made it seem easy as if the pcv valve is exposed near on top of the engine
Must i really remove several things to get to the pcv valve? If the pcv valve is failing it can cause your mazda 3’s engine to run rough and you may notice some exhaust smoke and oil leaks One end of the valve is larger than the other, making it almost impossible. Hiif you are looking for help with your automotive repairs, automobile installations, mechanical repair or adjustment, please head over to carfix for informa.
Always look higher than the oil staining, as it's more likely the oil is actually leaking from the valve cover gasket and running down the seam as opposed to the timing cover itself due to the fact that the timing. If it can be verified that vacuum occurs in the ventilation hose, the positive crankcase ventilation (pcv valve) system is determined to be normal If positive pressure occurs in the ventilation hose, perform.
