Schematic diagram of engine lubrication system 1 2 1 11 3 10 4 5 7 8 9 6 1 Lube oil lines to turbochargers 7 Oil pressure relief valve 2 Rocker arm lubrication 8 Oil cooler 3 Gudgeon pin lubrication 9 Bypass valve 4 Spray nozzles for piston cooling and cam lubrication 10 Oil filter 5 Camshaft bearing lubrication 11 Oil galleries 6 Oil suction pipe 20