1.8L - Engine Mechanical, Engine Code(S): AWD, AWW, AWP (A4 Platform)

• 00 - General, Technical Data
  • Technical data
    • Engine number
    • Engine data
• 10 - Engine - Assembly
  • Engine, removing and installing
    • Engine, removing and installing
    • Notes on removing
    • Engine, securing to assembly stand
    • Notes on installing
    • Engine and transmission mountings, aligning
    • Assembly mounting
      • Torque specifications
    • Additional information and assembly work on vehicles with air conditioning
• 13 - Engine - Crankshaft, Cylinder Block
  • Engine, disassembling and assembling
    • Engine, disassembling and assembling
    • Assembly overview
      • Notes
      • Part I
      • Part II
    • Ribbed belt, removing and installing
  • Sealing flanges and flywheel/drive plate
    • Sealing flanges and flywheel/drive plate
    • Sealing flanges and flywheel/drive plate, assembly overview
    • Crankshaft seal - ribbed belt side, replacing
    • Sealing flange (belt pulley side), removing and installing
    • Drive plate, removing and installing
      • Notes
      • Drive plate, loosening and tightening
      • Installing drive plate.
  • Crankshaft
    • Crankshaft
    • Crankshaft, assembly overview
      • Notes
      • Vehicles from approx. 05/00
    • Crankshaft dimensions
  • Piston and connecting rod
    • Pistons and connecting rods (engine code AWD), assembly overview
      • Notes
      • Checking piston ring gap
      • Checking ring to groove clearance
      • Checking piston
      • Checking cylinder bores
    • Piston and cylinder dimensions, engine code AWD
    • Pistons and connecting rods (engine code AWD, AWW), assembly overview
      • Notes
      • Checking piston ring gap
      • Checking ring to groove clearance
      • Checking piston
      • Bearing shells - installed positions
      • Checking cylinder bores
    • Piston and cylinder dimensions, engine codes AWP, AWW
• 15 - Engine - Cylinder head, Valvetrain
  • Cylinder head
    • Cylinder head
    • Cylinder head, assembly overview
      • Notes
      • Checking cylinder head for distortion
    • Toothed belt, removing, installing and tensioning
      • Notes
      • Removing
      • Installing
        • Notes
        • A - Toothed belt completely removed
        • B - Toothed belt only removed from camshaft gear
      • Toothed belt, tensioning
    • Cylinder head, removing and installing
      • Notes
      • Removing
      • Installing
    • Compression pressures, checking
  • Valvetrain
    • Valvetrain
    • Valvetrain, assembly overview
      • Notes
      • Refacing cylinder head sealing surface
      • Camshaft, checking axial play
      • Valve dimensions
      • Double bearing cap contact surfaces, sealing
      • Chain tensioner or camshaft adjuster/cylinder head contact surfaces, sealing
    • Valve seats, refacing
      • Notes
      • The maximum permissible refacing dimension is calculated as follows:
      • Refacing intake valve seat
      • Refacing exhaust valve seat
    • Camshaft seals, replacing
      • Oil seal at camshaft gear, removing and installing
      • Camshaft Position (CMP) Sensor G40 gasket, removing
    • Hydraulic valve lifters, checking
    • Camshafts, removing and installing
      • Notes
      • Removing
      • Installing
    • Camshaft adjustment, checking
      • Notes
      • Activation, checking
      • Solenoid valve, checking
      • Camshaft adjuster, checking function
    • Valve guides, checking
    • Valve stem seals, replacing
• 17 - Lubrication
  • Lubrication system components
    • Lubrication system components
    • Engine oil
    • Lubrication system components, assembly overview
      • Notes
      • Part I
        • Notes
        • Markings on oil dipstick
      • Part II
    • Oil pan, removing and installing
    • Oil pressure and oil pressure switch, checking
• 19 - Engine - Cooling system
  • Cooling system components
    • Cooling system components
    • Cooling system components (on body), assembly overview
    • Cooling system components (on engine), assembly overview
    • Coolant hose connection diagram
      • Vehicles with engine code AWD
      • Vehicles with engine code AWP (manual transmission), AWW (manual and automatic transmission)
      • Vehicles with engine code AWP (automatic transmission)
    • Cooling system, draining and filling
      • Notes
      • Draining
      • Filling
    • Radiator, removing and installing
      • Notes
      • Additional information and assembly work on vehicles with air conditioning
    • Coolant pump, removing and installing
    • Coolant thermostat, removing and installing
    • After-Run Coolant Pump V51 , checking
• 20 - Fuel supply
  • Fuel supply system components
    • Fuel supply system components
    • Fuel tank with attachments and fuel filter, assembly overview
      • Notes
      • Installation position of fuel delivery unit flange
      • Checking switch-over valve
      • Checking pressure retaining valve
    • Safety precautions when working on fuel supply system
    • Rules for cleanliness
    • Fuel delivery unit, removing and installing
    • Fuel Level Sensor G , removing and installing
    • Fuel tank, removing and installing
    • Crash fuel shut-off
      • Function
    • Fuel pump, checking
      • Notes
      • Function and voltage supply, checking
      • Checking delivery rate
      • Fuel Pump (FP) check-valve, checking
  • Electronic Engine Power Control (EPC)
    • EPC system, function
    • Electronic engine power regulation (EPC) components, assembly overview
    • Electronic Power Control (EPC) Warning Lamp in instrument cluster, meaning
    • Throttle Position (TP) Sensor G79 and Accelerator Pedal Position Sensor 2 G185 , checking
  • Evaporative emissions (EVAP) system
    • Evaporative emissions (EVAP) system
    • Function description of evaporative emissions (EVAP) system
    • Leak diagnosis, function description
    • EVAP canister system, assembly overview
    • Evaporative emissions (EVAP) system, overview
    • Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 , checking
    • EVAP system, checking for leaks
      • Notes
      • Function test
      • Checking for leaks
    • Leak Detection Pump (LDP), checking
      • Notes
      • Diagnostic pump, checking electrically
      • Checking voltage supply
    • EVAP system, checking using tester KILL 9210
      • Introduction
      • Calibrating the KLI90210 tester
      • Testing the fuel cap
      • Checking Leak Detection Pump (LDP) V144 for internal leaks
      • Conditions
      • Checking EVAP system for leaks
• 21 - Turbocharger, G-Charger
  • Charge air system with turbocharger
    • Charge air system with turbocharger
    • Turbocharger with attachments, assembly overview
      • Notes
      • Part I
      • Part II
    • Charge air cooler components, assembly overview
    • Exhaust turbocharging system (engine code AWD), overview
    • Exhaust turbocharging system (engine code AWP, AWW), overview
    • Rules for cleanliness
    • Safety precautions
  • Charge pressure system, checking
    • Boost pressure regulation, checking
    • Wastegate Bypass Regulator Valve N75 , checking
    • Charge Air Pressure Sensor G31 , checking
      • Notes
      • Voltage supply and wiring to control module, checking
      • Checking function
    • Turbocharger Recirculating Valve N249 , checking
    • Vacuum diaphragm for boost pressure regulator valve, checking
    • Deceleration shut-off valve, checking
    • Charge air system, checking for leaks
• 26 - Exhaust system, Emission controls
  • Exhaust system components
    • Exhaust system components
    • Exhaust system components, assembly overview
      • Notes
      • Separation point on exhaust pipe
      • Installing muffler free of tension
      • Installation position of double clamp
      • Installed location of mounting
  • Catalytic converter
    • Three Way Catalytic Converter (TWC), checking
  • Secondary air injection (AIR) system
    • Secondary air injection (AIR) system
    • Function
    • Secondary air injection (AIR) system components, assembly overview
      • Notes
      • Secondary Air Injection (AIR) Pump Relay J299
    • Combi-valve, checking
    • Secondary Air Injection (AIR) Pump Motor V101 , checking
    • Secondary Air Injection (AIR) Solenoid Valve N112 , checking