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you might want to pull your valve cover (intake side).....
there should be a good vent to the engine... but 4age's are known for having some sludge build up, and it does build up into the valve covers. Unlike most engines, the 4age doesn't exactly have a PCV valve... instead it has a breater built into the valve cover and essentially an upside down windage tray in the valve cover to keep oil from splashing into the vent tube... it's possible that it's not venting properly and building some condensation..... in any event, what can happen is that the windage tray (or the tube itself) can get clogged and no longer act as a vent
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