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Crankshaft dimensions > < Removing and installing crankshaft

A4 Mk1

Crankshaft - exploded view of components
   
Crankshaft - exploded view of components
1 - Bearing shell for cylinder block
q   With oil groove
q   Do not interchange used bearing shells (mark positions)
q   Inserting bearing shells for cylinder block with correct colour-coding → Fig.
2 - Drive chain sprocket for oil pump
q   Removing and installing → Chapter
3 - Bearing shell for bearing cap
q   Without oil groove
q   Do not interchange used bearing shells (mark positions)
q   Inserting bearing shells for cylinder block with correct colour-coding → Fig.
4 - Thrust washers for bearing No. 3
q   Note location
5 - 40 Nm + 90° (1/4 turn) further
q   Renew
q   For measuring radial clearance of crankshaft tighten to 40 Nm, but not further
6 - Bearing caps
q   Bearing cap 1: Pulley end
q   Bearing cap 3 with recesses for thrust washers
q   Bearing shell retaining lugs (cylinder block/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   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 when new: 0.07 ... 0.23 mm; wear limit: 0.30 mm
q   Measuring radial clearance → Chapter
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 bolts.
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
B=Blue
R=Red
G=Yellow

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

Crankshaft dimensions > < Removing and installing crankshaft