Fitment:for BMW Z4 2006-2007. Material: Valve cover gasket seal is made of durable rubber material, sealing, oil resistance, wear resistant,high temperature resistance, corrosion resistance, long service life, effectively prevent engine oil leakage into the valve mechanism.. Function:The purpose of the valve cover gaskets is to seal the cylinder to ensure no leakage of coolant or oil into the cylinder. Head gaskets prevent leakage of liquid and gas into adjacent cylinders and surrounding coolant galleries.. Replacement: If your valve cover leaks, your oil is always low, or you smell burning oil, you will need to replace the valve cover gasket..
