2 Lubricating oil diagram Engine description © 2009 17 1 Lubricating oil sump 2 Lubricating oil pump 3 Pressure limiting valve TD/TCD 2013 4 Lube oil cooler 5 Check valve TD/TCD 2012 6 Bypass valve 7 Bypass valve 8 Pressure control valve 9 Lubricating oil filter 10 Main lube oil channel 11 Piston cooling nozzle 12 Rocker arm 13 Internally switched exhaust gas return TCD 2012/2013L06 14 Turbocharger 15 Air compressor Lubricating oil system (example) 5 4 6 1 15 14 11 10 9 8 3 2 7 13 12