Audi A4

Since 1994 of release

Repair and car operation


Audi А4
+ Running gear
+ Regular servicing
- Engines
   Capacity steps
   Engine signs
   Technology of the engine, maintenance service and repair
   Greasing system
   Exhaust ventilation картера
   The visual control of the engine
   Engine service life
   Nominal and maximum frequency of turns
   Restriction of number of turns
   Measurement of pressure of compression
   The help at malfunctions
   Hydropushers
   Works on a gear belt
   The help at malfunction
   Installation and dismantle of a head of the block of cylinders
   Installation and engine dismantle
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics









Installation and dismantle of a head of the block of cylinders

Bolts of a head of the block of cylinders should be tightened from the sequence designated in figures. At the left the six-cylinder engine (the arrow shows a movement direction) and on the right – the 4-cylinder engine is shown.

To you are necessary: динамометрический a key, a long key with internal gear wreath Т55 (for the four-cylinder engine) or key TORX Е14 (for the six-cylinder engine) and a new lining.

Dismantle

The four-cylinder engine

 PERFORMANCE ORDER

  1. Result a face-to-face part of the car in service position (the head of the Detail of a body).
  2. Dismantle вязкостный the fan.
  3. Remove клиновой and klinovo-ridge belts, unscrew the device for a tension of belts.
  4. Merge cooling liquid through a carving stopper of a drain aperture of a radiator.
  5. Remove a socket on the gauge of a stream of fresh air, the electromagnetic valve of the coal filter and the terminal cascade of capacity of system of ignition (only 1,8 l the engine).
  6. Unscrew the case of the air filter in gathering, dismantle an air hose to a branch pipe throttle заслонки.
  7. Dismantle facing of the engine and unscrew a cover of a head of the block of cylinders
  8. Unscrew a branch pipe of a cooling liquid with the temperature gauge behind a head of the block of cylinders.
  9. Unscrew a broad tank with a cooling liquid.
  10. Disconnect sockets on all valves of injection and on the Hall gauge.
  11. In the engine with working volume 1,6 l remove all sockets of spark plugs and a high voltage wire.
  12. Unscrew arms of an inlet collector.
  13. Unscrew an inlet collector from a head of the block of cylinders and put aside.
  14. Disconnect a wire socket to a ljambda-probe, bare a wire.
  15. Unscrew an exhaust pipe ahead from a knee and wring out back.
  16. Dismantle a cover of a gear belt and put the cylinder piston № 1 in position ВМТ of the moment of ignition, see in the head above.
  17. Loosen the a fixing bolt of a tension roller.
  18. Note a direction of movement of a gear belt for the subsequent assemblage and remove it.
  19. Loosen the bolts of a head of the block of cylinders in return sequence under the inhaling scheme on the right downwards.

Dismantle

The six-cylinder engine

 PERFORMANCE ORDER

  1. Unscrew facing of the engine and a cover of a klinovo-ridge belt.
  2. Dismantle klinovo-ridge and gear belts (see has undressed the Generator).
  3. Unscrew an exhaust pipe from a knee.
  4. Merge cooling liquid through a carving stopper of a drain aperture of the engine and a radiator.
  5. Unscrew an air hose between the gauge of a stream of fresh air and an inlet collector.
  6. Disconnect a socket at the Hall gauge.
  7. Disconnect ventilation картера on a head of the block of cylinders at the left and on the right.
  8. Remove a vacuum hose on a branch pipe throttle заслонки at the left.
  9. Take out from clips a cover шумопоглотителя всасывания and unscrew both bolts under a cover.
  10. Wring out шумопоглотитель back and lift upwards.
  11. Remove the vacuum pipeline at шумопоглотителя at the left, remove шумопоглотитель.
  12. Unscrew a cover at the left the pipeline of valves of injection.
  13. Take out from clips a clamp throttle заслонки, hang out throttle заслонку and postpone it.
  14. Disconnect a socket of the gauge of temperature of soaked up air and the valve of stabilisation of idling.
  15. Disconnect submitting and returnable fuel pipelines.
  16. Unscrew connection with weight behind a branch pipe throttle заслонки.
  17. Disconnect a vacuum hose to the management block before a branch pipe throttle заслонки.
  18. Disconnect a socket at throttle заслонки.
  19. Unscrew a vacuum hose to the electromagnetic valve of the coal filter. Dismantle the electromagnetic valve.
  20. Disconnect all sockets of spark plugs.
  21. Disconnect all electric sockets of valves of injection.
  22. Disconnect sockets of a sensor control of a detonation and ljambda-probe heating.
  23. Disconnect sockets of a ljambda-probe and postpone wires.
  24. Disconnect sockets of the gauge of pressure of oil and the gauge of temperature of oil.
  25. Remove sockets of valves of injection at the left and on the right.
  26. Unscrew an arm of a hydraulic hose at an inlet collector. Do not disconnect a hydraulic hose.
  27. Unscrew an inlet collector and take out it.
  28. Close apertures a pure rag.
  29. Unscrew a tube of giving of a cooling liquid on a head of the block of cylinders behind.
  30. Dismantle a ljambda-probe.
  31. Unscrew the heat-shielding screen of a final collector.
  32. Unscrew a head of the block of cylinders.
  33. Dismantle a back cover of a gear belt.
  34. Unscrew a hose of a broad tank with a hydraulic liquid to the pump at a head of the block of cylinders.
  35. Loosen the bolts of a head of the block of cylinders in return sequence to that, as shown below. For this purpose it is necessary to cool the engine as the hot head of the block of cylinders can be deformed after dismantle.
  36. Lift a head of the block of cylinders. If it separates not at once, lungs постукивания a synthetic hammer will help.

Check of the dismantled head of the block of cylinders

For all engines

 PERFORMANCE ORDER

  1. Remove an old lining. Sealing surfaces of a head of the block of cylinders and the engine block should be absolutely pure and free from the lining rests. Do not scratch the sharp tool a soft sealing surface of a head of the block of cylinders. Jags can cause damage of a lining of a head of the block of cylinders in the future.
  2. Check up a head of the block of cylinders on deformation (especially important at damage of a lining as a result of an overheat).
  3. Put lengthways a long metal ruler or гарантированно an equal metal corner on the cleared sealing surface of a head of the block of cylinders.
  4. Check up a template, whether there is in any place a gleam more than 0,1 mm. In this case the head of the block of cylinders should be ground before installation.
  5. The head of the block of cylinders can be finished only in certain limits. Its minimum height measured from top to the bottom sealing surface, should be in the four-cylinder engine of 139,25 mm and in six-cylinder – 132,75 mm.

Installation

For all engines

 PERFORMANCE ORDER

  1. If the head of the block of cylinders it is necessary to oil slightly directing hydropushers varies. It also extends on heads of the block of cylinders with already established cam-shaft.
  2. If it is necessary, establish запорную a cover on a replaced head of the six-cylinder engine.
  3. The carving of bolts of a head of the block of cylinders and apertures on the engine block should be pure and without damages, otherwise at an inhaling of bolts the inhaling moment can be deformed.
  4. In carving apertures on the engine block there should not be a water or oil, differently a cast material can be broken off in the field of carving apertures.
  5. A little turn коленвал in a direction opposite to rotation that any piston was not in position ВМТ, differently at installation of a head of the block of cylinders the open valve can face the piston. It is necessary to track it also at the subsequent installation of a gear belt.
  6. Lining of a head of the block of cylinders impose on the engine block so that number of a detail or a designation "upwards" have been turned to a head of the block of cylinders.
  7. Establish a head of the block of cylinders. Pay thus attention to centering pins and the driven plugs.
  8. In the beginning screw up all bolts of a head of the block of cylinders manually and then tighten them in the sequence shown more low:

    The engine
    The four-cylinder
    The six-cylinder
    1st step of an inhaling
    40 Nanometers
    No)
    2nd step of an inhaling
    60 Nanometers
    60 Nanometers
    3 I an inhaling step Exactly tighten bolts a rigid key on a half-turn further (the same sequence). It can be made also on three quarters of a turn

  9. All bolts are definitively screwed up by such way.

     Important: to observe sequence of an inhaling at installation of an inlet collector of the six-cylinder engine.


  10. Mount a gear belt.
  11. Besides, in the four-cylinder engine with working volume 1,6 l check up ignition installation (the head ignition System).