Cylinder Block.........................................................................................................80 Head to Block Alignment ........................................................................................81 Cylinder Head Gasket..............................................................................................82 Cylinder Liner..........................................................................................................83 Oil Pan ....................................................................................................................84 Crankshaft................................................................................................................85 Piston and Connecting Rods....................................................................................86 Timing Gears............................................................................................................88 Drive Belt.................................................................................................................89 Lubrication System..................................................................................................90 Oil Pump..................................................................................................................90 Oil Flow Control and Filtration ...............................................................................91 Crankcase Ventilation ..............................................................................................93 Fuel System..............................................................................................................95 Fuel Filtration ..........................................................................................................97 Unit Injectors ...........................................................................................................98 Volvo Engine Brake ...............................................................................................101 Exhaust Gas Recirculation System........................................................................104 EGR Valve .............................................................................................................105 EGR Valve Function ..............................................................................................105 EGR Cooler Inlet Pipe ...........................................................................................106 EGR Cooler............................................................................................................107 EGR Venturi System..............................................................................................107 EGR Cooler Outlet Pipe.........................................................................................107 EGR Mixer.............................................................................................................107 Inlet Air Heater ......................................................................................................108 EGR Diagnostics....................................................................................................108 Air Intake System ......................................................................................................109 Variable Geometry Turbocharger...............................................................................109 Cooling System..........................................................................................................110 Coolant Pump ........................................................................................................110 Thermostat .............................................................................................................111 Engine Cooling Fan ...............................................................................................111 Engine Managment System .......................................................................................112 Engine Electronic Control Unit (EECU) ...............................................................112 Exhaust Aftertreatment System .................................................................................113 Exhaust Gas Recirculation.....................................................................................113 Particulate Matter...................................................................................................113 Catalytic Filters......................................................................................................114 Diesel Oxidation Catalyst ......................................................................................114 Diesel Particulate Filter..........................................................................................115 Filter Regeneration.................................................................................................115 Passive Regeneration .............................................................................................115 Active Regeneration...............................................................................................116 Manual Regeneration.............................................................................................118 Discharge Recirculation Valve...............................................................................118 Ultra Low Sulfur Diesel Fuel.................................................................................118