Could be caused by excessive blowby gas going thru the cylinders due to wear and tear that the PCV valve cannot handle it. If the PCV system is okay and the oil still making it to the airfliter-your looking at an engine rebuild.
Check the crankcase ventilation what it does is this; a vacuum line goes from the intake manifold to the engine block on one end. On the other end a hose goes from the air cleaner, to the PCV valve which usually sits in a rubber grommet on the valve cover. This creates an air flow through the crankcase which draws all the blow by gases into the intake manifold to be recirculated through the engine.
Sunday, September 7th, 2008 AT 1:15 PM