Where is the PCV on a 1993 BMW 525i?

Answer 1

BMW do not use a pcv valve system, instead they use a cyclone seperator system, and crankcase vent valve. the system is located under the intake manifold. comming problems are they rubber inside go bad, and the hoses get dry and brittle and crack, most commin is the valve from the cyclone seperator hose that runs excessive oil to engine, this hose is connected at the base of the dipstick will break off at the top of the seperator, this will cause a vacuum leak. good luck.