Replacing PCV Oil Trap on Volvo six cylinder engines 3.2 or T6 including Freelander 2

Bad PCV symptoms are excessive vacuum from oil filler neck or whistling howling engine, air escaping from PCV hole. Two options to repair, one is replacement of complete PCV cover assembly and second to replace just the valve which is much easier and cheaper. This will work on any Volvo 6 cylinder engines including Land Rover Freelander 2. 2009 XC70 T6 with 112000km complete assembly replacement. 2013 S80 T6 with 160000km just the membrane replacement. Valve cover assembly 31319643 (order by VIN only) Just the membrane LR023777