The UK quattro Network
The UK's mobile Audi 5-cylinder mechanic - 07833 654800, 24x7
Specialist in turbos, quattros, electrics and non-starts

On this site, "left" and "right" are used in the direction of travel

• Technical Data
• Removing and Refitting Engine
  • Engine Removal
  • Attaching the Engine to a Stand
  • Refitting the Engine
  • Torque settings
  • Aligning the Engine and Gearbox
• Block, Crank and Pistons
  • Piston crown dimensions
  • Fitting flywheel timing pegs
  • Dismantling and rebuilding the engine
  • Fitting the timing belt
  • Adjusting the accessory belts
  • Dismantling and reassembling the block, crank and flywheel
  • Removing the flywheel and crank roller bearing
  • Measuring crankshaft radial play - crankshaft dimensions
  • Fitting pegs for ignition angle and timing
  • Dismantling and reassembling crank and big ends
  • Measuring big end bearing play
• Cylinder Head and Valves
  • Removing camshaft and camshaft oil seal
  • Measuring compression
• MB Engine:
  • Removing and refitting the cylinder head
  • Checking the cylinder head for distortion
  • Fitting the cylinder head
  • Measuring compression
  • Dismantling and reassembling the valvegear
  • Camshaft caps and valve dimensions
  • Reworking valve seats
  • Checking hydraulic tappets
  • Replacing the camshaft oil seal
  • Removing and refitting the camshaft
  • Checking and replacing the valve guides
  • Replacing the valve stem oil seals
• Lubrication
  • Front crankshaft oil seal and cam belt - removal and replacement
  • Removing and refitting parts of the lubrication system
  • Removing the oil pump
  • Checking the oil pressure switch
  • Checking the oil pressure warning lamp and controller
• Cooling
  • Draining and refilling the coolant
  • Checking the cooling system
  • Coolant concentrations
• MB Engine:
  • Removing and refitting parts of the cooling system
  • Draining and refilling the coolant
  • Iinjector cooling fan and thermoswitch - checks and diagnostics
  • Turbo cooling control unit and pump - diagnostics
• Fuel Supply
  • Removing and Refitting Fuel System Components
  • Removing and Refitting Fuel System Components
  • Cleanliness Requirements when Working on Fuel Systems
  • Checking the Fuel System for Leaks
  • Removing the Fuel Tank
  • Checking the Electric Fuel Pump
  • Checking the Fuel Pump Check Valve
  • Adjusting the Accelerator Cable
  • Checking and Adjusting the Throttle Body Dashpot (from the 20V manual)
• Turbocharger
  • Attaching and operating a boost gauge
  • WR boost levels
  • Measuring turbo axial and radial play
  • Turbo system components - water-cooled turbo illustrated
  • MB boost levels
  • Removing and refitting the turbo
  • Turbo cooling pump - basic checks
• Fuel Injection - WR Engine
  • Technical data - K-Jetronic fuel injection
  • Attaching a fuel pressure gauge
  • Location of two-way enrichment control valve
  • Setting idle speed
  • Valve for increasing idle speed - a/c only
  • Adjusting the mixture to set a CO value
  • Testing the thermopneumatic valve
  • Testing the injector cooling fan switch
  • Testing the cold start valve
  • Adjusting the accelerator cable
  • Testing and adjusting the full load switch
  • Setting up with protractor 3084
• Fuel Injection - MB Engine
  • Servicing the fuel injection system
  • Technical data
  • Cleanliness rules when working on fuel injection
  • Checking and setting idle speed and CO value
  • Rest position and slack movement of the air mass meter paddle
  • Testing the cold start valve
  • Measuring control pressure
  • Measuring system pressure
  • Measuring residual pressure
  • Testing fuel injectors
  • Removing and refitting the metering head
  • Setting the throttle body stop
  • Removing and refitting the electronic control unit (ECU)
  • Idle stabilisation
  • Checking idle stabilisation
  • Idle stabilisation controller diagnostics
• Vacuum Hoses
  • Vacuum hoses - WR to 85-B-901 372
  • Vacuum hoses - WR from 85-B-901 373
  • Vacuum hoses - WR from 85-B-901 319 with air conditioning
  • Vacuum hoses - MB
• Exhaust system
  • Concertina pipe between wastegate and downpipe
  • Removing and refitting exhaust components
• Ignition - WR and GV Engine
  • Technical data
  • Testing distributor
  • Safety precautions for electronic ignition
  • Functional description of the system
  • Fitting the distributor
  • Change to distributor connector
  • Measuring the primary and secondary coil resistances
  • Setting the timing
  • Installing the timing sender
  • Testing the rpm sender
  • Testing the inlet air temperature sender
  • Testing the idle switch
  • Checking and setting the idle and full load switches using the protractor 3084
  • Measuring the Hall sender
  • Testing the Hall sender switch unit
  • Testing the electronic control unit (ECU)
  • Electronic control unit and auxiliary air valve
  • Diagnostic table
• Ignition - MB Engine
  • Servicing the fully electronic ignition
  • Technical data
  • Safety precautions for electronic ignition
  • Self-diagnosis system
  • Reading error codes
  • Error code table
  • Testing the coil and power output stage
  • Testing the coil
  • Testing the timing point sender G4
  • Testing the engine rpm sender G28
  • Testing the inlet air temperature sender
  • Removing and refitting the inlet air temperature sender
  • Testing the coolant temperature sender
  • Testing the idle and full load switch
  • Testing the Hall sender
  • Distributor basic setup
  • Measuring ECU power supply voltage
  • On-board diagnostic checks
  • On-board diagnostics checks - operation
  • Checking fuel pump relay (J17) control
  • Checking fuel frequency valve (N7)operation
  • Checking wastegate frequency valve (N75) operation
  • Checking cold start valve (N17) operation
  • Testing overtemperature switch
  • Adjusting the idle and full load switch

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