Overview - Crankshaft

• For assembly work, secure the engine on the engine and transmission holder. Refer to ENGINE, SECURING TO ENGINE AND TRANSMISSION HOLDER .

Fig 1: Crankshaft Exploded View

Courtesy of AUDI OF AMERICA, LLC

1. Cylinder Block
2. Cylinder Block Bearing Shell
   • Always replace any worn bearing shells
   • With oil groove
   • Lubricate with engine oil
   • Crankshaft bearing shells identification (classification). Refer to MAIN BEARING SHELLS ALLOCATION .
3. Crankshaft
   • After removing, set it aside so that the sensor wheel, refer to -item  8- is not rested on and becomes damaged.
   • If the crankshaft is being replaced, then the bearing shells must be reallocated to the bearing cap. Refer to MAIN BEARING SHELLS ALLOCATION .
   • Axial play, measuring. Refer to CRANKSHAFT, MEASURING AXIAL CLEARANCE .
   • Radial play, measuring. Refer to CRANKSHAFT, MEASURING RADIAL CLEARANCE .
   • Crankshaft dimensions. Refer to CRANKSHAFT DIMENSIONS .
4. Bearing Shell for Bearing Cap
   • Always replace any worn bearing shells
   • Without oil groove
   • Lubricate with engine oil
   • Crankshaft bearing shells identification (classification). Refer to MAIN BEARING SHELLS ALLOCATION .
5. Bolt
   • Tightening specification and sequence. Refer to Fig 2.
   • Always replace after removing
   • Use old bolts for the radial clearance measurement
6. Bearing Cap
   • Bearing cap 1: belt pulley side
   • Bearing caps 2, 3 and 4 also installed on the side
   • Mark the installation position for reinstallation. Refer to Fig 3.
7. Bolt
   • 10 Nm + 90°
   • Always replace after removing
   • Replace the sensor wheel every time the bolts are loosened, refer to -item  8-. Refer to SENSOR WHEEL, REMOVING AND INSTALLING .
8. Sensor Wheel
   • Always replace the sensor wheel every time the bolts are loosened, refer to -item  7- (Bolt).
   • For Engine Speed Sensor -G28-
   • Only possible to install in one position
   • Removing and installing. Refer to SENSOR WHEEL, REMOVING AND INSTALLING .
9. Thrust Washers
   • For bearing 3
   • Lubricate with engine oil
10. Bolt
    • Tightening Specifications and Sequence. Refer to Fig 2.
    • Always replace after removing

Fig 2: Crankshaft Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

• Replace the bolts that were tightened with an additional turn.

-- Tighten the bolts in the steps shown in the sequence:

Fig 3: Crankshaft Bearing Cap

Courtesy of AUDI OF AMERICA, LLC

-- Mark the installation position of the bearing cap -1 through 5- for reinstallation.

• The tabs -arrows- on the bearing caps point toward the crankshaft bearing "3" on the intake side.