Crankshaft Overview

Fig 1: Identifying Assembly Overview: Crankshaft

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

1. Cylinder Block 
   • Checking the cylinder bore. Refer to Figure.
   • If the cylinder block is being replaced, then the bearing shells must be allocated. Refer to CRANKSHAFT BEARING SHELL ALLOCATION .
   • For the correct piston and cylinder dimensions, refer to PISTON AND CYLINDER DIMENSIONS .
2. Bearing Shell, for the Cylinder Block 
   • With a lubricating groove.
   • Do not interchange used bearing shells (mark them).
   • Allocation, refer to CRANKSHAFT BEARING SHELL ALLOCATION .
3. Crankshaft 
   • After removal, lay aside so that the sensor wheel (List Item:  8) is not rested on and becomes damaged.
   • If the crankshaft is being replaced, then the bearing shells must be allocated to the bearing cap. Refer to CRANKSHAFT BEARING SHELL ALLOCATION .
   • Crankshaft bearing cap tightening sequence. Refer to Fig 2.
   • Crankshaft needle bearing, replacing (vehicles with a Direct Shift Gearbox (DSG). Refer to CRANKSHAFT NEEDLE BEARINGS .
   • Checking the axial play. Refer to CRANKSHAFT AXIAL PLAY, CHECKING .
   • Checking the radial play. Refer to CRANKSHAFT RADIAL PLAY, CHECKING .
   • Do not rotate the crankshaft when measuring the radial play.
   • Crankshaft dimensions, refer to CRANKSHAFT DIMENSIONS .
4. Bearing Shell, for the Bearing Cap 
   • Without a lubricating groove
   • Do not interchange used bearing shells (mark them).
   • Allocation, refer to CRANKSHAFT BEARING SHELL ALLOCATION .
5. Bolt 
   • Always replace.
   • For the tightening sequence and specification; refer to Fig 2.
6. Bearing Cap 
   • Bearing cap 1: Belt pulley side.
   • Retaining tabs on the bearing shells and cylinder block/bearing caps must lie above one another.
7. Screw 
   • 10 Nm + 90° (1/4) additional turn.
   • Always replace.
   • Replace the sensor wheel every time the screws are loosened. Refer to CRANKSHAFT SENSOR WHEEL, REPLACING .
8. Sensor Wheel 
   • For the engine speed sensor -G28-.
   • Only possible to install in one position, the bores are offset.
   • Replace the sensor wheel every time screws are loosened. Refer to CRANKSHAFT SENSOR WHEEL, REPLACING .
9. Thrust Washers 
   • For bearing cap 3.
10. Bolt 
    • Always replace.
    • Tightening sequence, refer to Fig 2.

Fig 2: Identifying Crankshaft Bearing Cap Bolt Tightening Sequence and Specification

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Tighten the crankshaft bearing cap bolts in sequence -1 through 10- :

1. Tighten the bolts -1 through 10- and the -arrows- by hand. 
2. Tighten the bolts -1 through 10- to 65 Nm. 
3. Tighten the bolts -1 through 10- an additional 90° (1/4) turn using a ratchet. 
4. Tighten the bolts -arrows- to 20 Nm. 
5. Tighten the bolts -arrows- and additional 90° (1/4) turn using a ratchet.