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3.0L V6 (Engine Code: Avk): Overview Audi A6 C5 facelift

Mechanical 5 illustrations ~666 words

Engine identification

Note. Engine identification is visible first after preparations.

  1. Remove front engine cover (arrows).

Scheme 320

Scheme 320
Scheme 320

A sticker containing "engine code" and "production number" (arrow) is located on the housing for vacuum diaphragm for intake manifold adjustment.

Scheme 321

Scheme 321
Scheme 321

If the sticker is not present and the "engine identification" is required, proceed as follows

  1. Remove rear engine cover (arrows).

Engine codes are stamped on rear of cylinder block, left side (arrow).

Engine codes are also included on the vehicle data plate.

Scheme 322

Scheme 322
Scheme 322

If the sticker is not present and the "engine identification" and "production number" is required, proceed as follows

  1. Remove bolts (arrows) and remove vacuum diaphragm for intake manifold adjustment.
  2. Remove compression spring which is behind it and set off to side with vacuum diaphragm with connected lines.

The engine code -arrow- ("engine code" and "production number") are located at the front of cylinder head, on top.

Scheme 323

Scheme 323
Scheme 323

Lock carrier in service position, overview

The following list pertains to see scheme 88.

  1. 50 Nm 4x
  2. 3369 support tool Tighten to 10 Nm
  3. 10 Nm
  4. 10 Nm
  5. 10 Nm
  6. 10 Nm
  7. 3369 support tool Tighten to 10 Nm
  8. 50 Nm

Scheme 324

Scheme 324
Scheme 324

Toothed belt drive, assembly overview

Note. Before removing toothed belt, note direction of rotation with chalk or felt-tip marker. Reversing the direction of rotation of a run-in belt can destroy the belt.

The following list pertains to see scheme 111.

  1. 45 Nm Self-locking Always replace
  2. Washer
  3. 45 Nm
  4. Tensioner roller
  5. Tensioning lever Insert shim item 6
  6. Washer for tensioner lever
  7. Toothed belt Before removing, note direction of rotation using chalk or felt-tip marker Check for wear Removing (see «TOOTHED BELT, REMOVING AND INSTALLING»(ref-196254-S00113299912005100700000) ) Install (adjust timing) (see «INSTALLING (ADJUSTING VALVE TIMING)»(ref-196254-S18761640162005100700000) )
  8. 45 Nm
  9. Exhaust camshaft, toothed belt gear for cylinder bank 1 (right) with vibration damper with camshaft adjuster Identification "Exhaust"
  10. Intake camshaft, toothed belt gear for cylinder bank 1 (right) with camshaft adjuster Identification "Intake"
  11. 10 Nm Self-locking Always replace
  12. Bracket for idler roller
  13. 10 Nm Self-locking Always replace
  14. Toothed belt guard, rear right
  15. Idler roller
  16. 10 Nm
  17. 10 Nm
  18. Mechanical coolant pump Removing- and installing (see «COOLANT PUMP, REMOVING AND INSTALLING»(ref-196255-S42099136242005100700000) )
  19. Gasket Always replace
  20. Intake camshaft, toothed belt gear for cylinder bank 2 (left) with camshaft adjuster Identification "Intake"
  21. Toothed belt guard, rear left
  22. 10 Nm Self-locking Always replace
  23. Exhaust camshaft, toothed belt gear for cylinder bank 2 (left) with vibration damper with camshaft adjuster Identification "Exhaust"
  24. 100 Nm Use T40030 camshaft adjuster gauge when loosening or tightening
  25. O-ring Always replace
  26. Cap
  27. Snap ring
  28. Diamond disc for toothed belt gear Replace after removing toothed belt
  29. Eccentric pulley
  30. 45 Nm
  31. Toothed belt gear for crankshaft Replace diamond disc item 28 - after removal Contact surface between toothed belt gear, diamond disc and crankshaft must be free of oil. Installation only possible in one position Version dependent with/without thrust washer. Observe note (see «HARMONIC BALANCER, REMOVING AND INSTALLING»(ref-196254-S37420162542005100700000) )
  32. Turn central lock 200 Nm plus an additional 180 (1/2 turn) Always replace Do not add oil Use T40026 locking pin when loosening or tightening Thread in T40026 locking pin (see «HARMONIC BALANCER, REMOVING AND INSTALLING»(ref-196254-S37420162542005100700000) )
  33. Toothed belt tensioner
  34. 10 Nm

Identification of crankshaft bearing caps

  1. Bearing 1 is located on the belt pulley side

Oil check valves and spray jet valve, overview

Note. If irregular valve noise occurs repeatedly during short journeys and disappears after extended driving, the oil check valves must be replaced.

The following list pertains to see scheme 428.

  1. O-rings Always replace
  2. Oil check valve -20 Nm for oil supply at left cylinder head
  3. Banjo fitting - 15 Nm
  4. Baffle
  5. Gasket Always replace
  6. Cover with connection for crankshaft housing ventilation Removing, see «INTAKE MANIFOLD, REMOVING AND INSTALLING»(ref-196254-S06782678992005100700000)
  7. 10 Nm
  8. Hose to pressure regulation valve of crankshaft housing ventilation
  9. Spray jet valve - 25 Nm for piston cooling
  10. Oil line
  11. O-ring Always replace
  12. Oil check valve - 20 Nm for oil supply at right cylinder head
  13. O-ring Always replace

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