![]() ![]() You can ignore the symptoms of a failing valve cover gasket for a while. What are the symptoms of a bad valve cover gasket on the BMW N51/N52N? One thing to note about the N51 and N52N engines is that the valve cover screws DO NOT need to be replaced, unlike the magnesium valve cover which requires special aluminum screws (which are also prone to breaking), the N51 and N52N engine's valve cover has encapsulated hardware. ![]() Unlike early N52 engines, which used a magnesium valve cover and had an external crankcase vent valve, the updated version features a plastic valve cover with an integrated PCV valve. This DIY is going to be centered around handling the replacement of a valve cover gasket (and associated gaskets) on N51 and N52N engines.
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