Crankshaft Overview

Fig 1: Crankshaft Assembly Overview

Courtesy of AUDI OF AMERICA, LLC

1. Cylinder Block
2. Bearing Shell for Cylinder Block
   • With lubricating groove
   • Do not interchange used bearing shells (mark)
   • Crankshaft bearing shell identification, refer to ALLOCATION OF THE CRANKSHAFT BEARING SHELLS (CLASSING) 
3. Crankshaft
   • After removal, place in such a way it does not rest on sensor wheel -5- and damage it
   • If the crankshaft is being replaced, then the bearing shells must be allocated to the bearing cover. Refer to ALLOCATION OF THE CRANKSHAFT BEARING SHELLS (CLASSING) 
   • Axial clearance, refer to CRANKSHAFT AXIAL PLAY, MEASURING 
   • Radial clearance, refer to CRANKSHAFT RADIAL PLAY, MEASURING 
   • Do not turn crankshaft when measuring radial play
   • Crankshaft dimensions, refer to CRANKSHAFT DIMENSIONS 
4. Bearing Shell
   • Without lubricating groove
   • Do not interchange used bearing shells (mark)
   • Crankshaft bearing shells identification (classification), refer to ALLOCATION OF THE CRANKSHAFT BEARING SHELLS (CLASSING) 
5. Bolt
   • Replace
   • Tightening sequence, refer to Fig 2
6. Bearing Cap
   • Bearing cap 1: Belt pulley side
   • Retaining tabs of the bearing shells and cylinder block/bearing caps must lie above one another
7. Bolt
   • 10 Nm plus an additional 90° turn
   • Replace
   • Replace sensor wheel every time bolts are loosened, refer to SENSOR WHEEL 
8. Sensor Wheel
   • For Engine Speed (RPM) sensor -G28-
   • Only possible to install in one position - Bores are offset
   • Replace sensor wheel every time bolts are loosened
   • Removing and installing, refer to SENSOR WHEEL 
9. Thrust Washers
   • For bearing 3
10. Bolt
    • Replace
    • Tightening sequence, refer to Fig 2

Fig 2: Crankshaft Bearing Cap, Installing

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the crankshaft bolts in sequence -1 to 5-.

-- Tighten the bolts -1 through 10- and -arrows- hand-tight.

-- Tighten the bolts -1 through 10- to 65 Nm.

-- Tighten the bolts -1 through 10- 90° further using a rigid wrench.

-- Tighten the bolts -arrows- to 20 Nm.

-- Tighten the bolts -arrows- 90° further using a rigid wrench.