The attached is the newer cover but the baffles should be almost the same. There are baffles and returns that keep oil from going out the PCV and air inlets. They are very thin aluminum so high pressure water may have done some damage. There is a better unit available that has better baffling that is sealed, it combats oil use through the PCV valve. GM Part #12570563
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Monday, December 24th, 2018 AT 3:33 PM