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Crankshaft dimensions > < Crankshaft

A4 Mk1

Crankshaft - exploded view
   
Crankshaft - exploded view
1 - Bearing shell
q   For cylinder block (with oil groove)
q   Do not interchange used bearing shells (mark positions)
q   Fit bearing shells for cylinder block with correct colour-coding → Fig.
2 - Chain sprocket
q   For oil pump chain
q   Renewing → Chapter
3 - Bearing shell
q   For bearing cap (without oil groove)
q   Do not interchange used bearing shells (mark positions)
q   The crankshaft bearing shells in the bearing caps are only supplied as spare parts with “yellow” coloured markings.
4 - Thrust washers
q   For bearing No. 3
q   Different types for cylinder block and bearing cap
q   Note location
5 - 65 Nm + 90° (1/4 turn) further
q   Renew
q   For measuring radial clearance of crankshaft tighten to 65 Nm, but not further
6 - Bearing cap
q   Bearing cap 1: Pulley end
q   Bearing cap 3 with recesses for thrust washers
q   Retaining lugs on bearing shells in cylinder block and bearing cap must be on the same side
7 - 10 Nm + 90° (1/4 turn) further
q   Renew
q   Sender wheel must be renewed if bolts are loosened → Fig.
8 - Needle bearing
q   For vehicles with manual gearbox
q   Extracting and driving in → Chapter
9 - Sender wheel
q   For engine speed sender -G28-
q   Can only be installed in one position (holes are off-set)
q   Sender wheel must be renewed if bolts are loosened
q   Removing and installing → Fig.
10 - Crankshaft
q   Axial clearance (new): 0.07 ... 0.23 mm
q   Axial clearance: wear limit: 0.30 mm
q   Check radial clearance with Plastigage
q   Radial clearance (new): 0.02 ... 0.04 mm
q   Radial clearance: wear limit: 0.15 mm
q   Do not rotate the crankshaft when checking the radial clearance
q   Crankshaft dimensions → Chapter

   
Removing and installing sender wheel
–  Sender wheel -2- must always be renewed after slackening off bolts -1-.
  Note
t  If the countersunk bolts are tightened a second time, the seats for the bolt heads in the sender wheel will be deformed to such an extent that the bolt heads make contact with the crankshaft -3--arrows- and the sender wheel beneath the bolts will be loose.
t  Sender wheel can only be installed in one position. Holes are off-set.
Tightening torque
  A13-0150
ComponentNm
Sender wheel to crankshaft10 + 90° 1)2)
l  1) Renew bolt.
l  2) 90° = one quarter turn.

   
Matching crankshaft bearing shells to bearings in cylinder block
Bearing shells of the correct thickness are assigned to the cylinder block at the factory. Coloured dots are used to identify the thickness of the bearing shells.
  Note
The -arrow- points in direction of travel.
Letter codes on lower sealing surface of cylinder block indicate which bearing shell is to be fitted at each location.
  A13-0405
Letter on cylinder blockColour coding of bearing
G=Yellow
R=Red
S=Black

  Note
The crankshaft bearing shells in the bearing caps are only supplied as spare parts with “yellow” coloured markings.
   

Crankshaft dimensions > < Crankshaft