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Allocation of main bearing shells for new crankshafts > < Crankshaft

A4 Mk2

Crankshaft - exploded view
   
Crankshaft - exploded view
1 - Cylinder block
q   Matched to -item 12-
q   Applying sealant onto cylinder block (for retaining frame) → Fig.
2 - Gaskets
q   Renew
3 - Oil seal for crankshaft (pulley end)
q   Renewing → Chapter
4 - Dowel sleeve
q   2x
q   Insert in retaining frame
q   Installation position → Fig.
5 - 9 Nm
6 - Guide tube for oil dipstick
7 - O-ring
q   Renew
8 - Bolts
q   For retaining frame
q   Renew
q   Different bolt lengths
q   Tightening sequence → Fig.
9 - Baffle plate
10 - 9 Nm
q   Tightening sequence → Fig.
11 - Bolt
q   For sealing surfaces: cylinder block/retaining frame
q   Different bolt lengths
q   Tightening sequence → Fig.
12 - Retaining frame
q   Matched to -item 1-
q   Applying sealant onto cylinder block (for retaining frame) → Fig.
q   Tightening sequence for securing bolts → Fig.
13 - Thrust washer
q   Only fitted on 4th crankshaft bearing
q   Oil grooves face outwards
q   Make sure it engages in retaining frame
q   Measuring axial clearance of crankshaft → Chapter
14 - Bearing shell
q   For retaining frame (without oil groove)
q   Mark used bearing shells for re-installation but not on bearing surface
q   Bearing shells worn down to the base layer must be renewed
q   Install new bearing shells for retaining frame with correct coloured markings
   New crankshafts → Chapter
   Used or machined crankshafts → Chapter
15 - Crankshaft
q   Measuring axial clearance → Chapter
q   Measuring radial clearance → Chapter
q   Crankshaft dimensions → Chapter
16 - Thrust washer
q   Only fitted on 4th crankshaft bearing
q   Oil grooves face outwards
q   Measuring axial clearance of crankshaft → Chapter
17 - Bearing shell
q   For cylinder block (with oil groove)
q   Mark used bearing shells for re-installation but not on bearing surface
q   Bearing shells worn down to the base layer must be renewed
q   Install new bearing shells for the cylinder block with the correct coloured markings
   New crankshafts → Chapter
   Used or machined crankshafts → Chapter
18 - Gaskets
q   Renew

   
Tightening sequence for baffle plate
–  Tighten bolts in the sequence -1 ... 16-.
  A13-10357
Applying sealant onto cylinder block (for retaining frame)
–  Clean sealing surfaces; they must be free of oil and grease.
–  Apply the beads of sealant -arrows- onto the clean sealing surfaces of the retaining frame as illustrated.
l  Width of sealant beads: 2.0 mm.
–  Fit gaskets -1 … 4-.
  A13-10292
Fitting location of dowel sleeves
–  Check that dowel sleeves -arrows- are inserted in retaining frame at positions shown in illustration.
  A13-10293
Installing retaining frame
–  Renew bolts -1 … 20-.
–  Tighten bolts in 5 stages as follows:
  A13-10294
StageBoltsTightening torque/tightening angle
1.-1 … 10-30 Nm
2.-11 … 20-20 Nm
3.-1 … 10-50 Nm
4.-11 … 20-30 Nm
5.-1 … 20-turn 90° further

–  Tighten bolts for sealing surfaces between retaining frame and cylinder block -shaded dark- to 9 Nm in diagonal sequence.
   

Allocation of main bearing shells for new crankshafts > < Crankshaft