Filed Under (BMW) by admin on 26-08-2010
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Oil Separator – Cold Climate Conditions MODEL NEW E39 5 Series, E46 3 Series, E53 X5, E60 5 Series, E83 X3, E85 Z4 with M54 Engine SITUATION Certain areas of the US experience extremely cold climate conditions during the winter months. A small number of vehicles in the above series listed have experienced problems ranging from leaking or broken valve covers to complete engine failure. CAUSE Moisture accumulating in the engine oil separator, hose to oil dipstick guide tube or the orifice in the dipstick guide tube can freeze. When this occurs, depending on the position of the internal valve, this may either cause high crankcase pressures (stuck closed) resulting in valve cover leakage/breakage or cause an oil hydro-lock condition (stuck open) which could result in engine damage. NEW CORRECTION E39 In case of a customer complaint, replace the crankcase vent valve, crankcase vent hoses and remove and clean the oil dipstick guide tube orifice. E46, E53, E60, E83 and E85 In case of a customer complaint, replace the crankcase vent valve, crankcase vent hoses and dipstick guide tube
