audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Removing and installing balance shaft timing chain > < Removing and installing camshaft timing chain

A4 Mk3

Balance shaft timing chain - exploded view
   
Balance shaft timing chain - exploded view
1 - Bolt
q   Renew
q   9 Nm
2 - Balance shaft
q   Exhaust side
q   Always renew after removal
q   Lubricate bearing with engine oil
q   Renewing → Chapter
3 - Tube for balance shaft
q   Installation position → Fig.
4 - Chain tensioner
q   65 Nm
5 - Cylinder block
6 - Balance shaft
q   Inlet side
q   Always renew after removal
q   Lubricate bearing with engine oil
q   Renewing → Chapter
7 - O-ring
q   Lubricate with engine oil
8 - Bearing mounting
q   Lubricate with engine oil
q   Installation position → Fig.
9 - Idler gear
q   For balance shaft
q   If bolt → Item has been loosened, idler gear must be renewed
10 - Bolt
q   Renew
q   9 Nm
11 - Washer
12 - Bolt
q   If bolt has been loosened, idler gear → Item must be renewed
q   Tightening sequence → Fig.
13 - Guide rail
q   For timing chain
14 - Guide pin
q   20 Nm
15 - Tensioning rail
q   For timing chain
16 - Guide pin
q   20 Nm
17 - Timing chain
q   Removing → Chapter
18 - Chain sprocket
q   Installation position → Fig.
19 - Guide rail
q   For balance shaft timing chain
20 - Guide pin
q   20 Nm

   
Tube for balance shaft - installation position
l  Lug on tube for balance shaft must engage in slot -arrow-.
  A15-10468
Bearing mounting - installation position
l  Renew O-ring -1- and lubricate with oil.
l  Dowel pin -arrow- for bearing mounting must engage in bore in cylinder block.
l  Lubricate bearing mounting.
  A15-10466
Idler gear - tightening sequence
  Caution
Always renew idler gear. If this is not done, there is no backlash, which causes engine damage.
The new idler gear has a special lubricant coating, which wears off after a short running period and thus automatically creates the specified backlash.
–  Secure with new bolt as follows:
1.  Tighten with torque wrench initially to 10 Nm.
2.  Turn idler gear.
Idler gear must be without play; otherwise loosen bolt and tighten again.
3.  Tighten with torque wrench to 25 Nm.
4.  Use rigid wrench to turn 90° further.
  A15-10464

Removing and installing balance shaft timing chain > < Removing and installing camshaft timing chain