Crankshaft Overview

Fig 1: Crankshaft Overview

Courtesy of AUDI OF AMERICA, LLC

1. Crankshaft
   • Axial Play, Measuring. Refer to CRANKSHAFT, MEASURING AXIAL CLEARANCE .
   • Radial Play, Measuring. Refer to CRANKSHAFT, MEASURING RADIAL CLEARANCE .
   • Crankshaft Dimensions. Refer to CRANKSHAFT DIMENSIONS .
2. Alignment Sleeve
   • Quantity: 2
   • Insert in cylinder block.
3. Guide Frame
   • Installation. Refer to Fig 2.
4. Bolt
   • Replace
   • Tightening specification and sequence, refer to Fig 2.
5. Thrust Washer
   • Only at 3rd crankshaft bearing.
   • Installed position: the oil grooves face outward.
   • Pay attention to the locating point.
6. Bearing Shell
   • For guide frame.
   • mark used bearing shells for reinstallation but not on the running surface.
   • Replace the bearing shells worn down to the base layer.
   • Insert new bearing shells for guide frame with proper color marking, refer to Fig 4.
7. Centering Bushing for Torque Converter
   • Install in the crankshaft.
8. Alignment Pin
   • Make sure the crankshaft fits correctly.
9. Thrust Washer
   • Only at 3rd crankshaft bearing.
   • Installed position: the oil grooves face outward.
   • Pay attention to the locating point.
10. Bearing Shell
    • For cylinder block with oil groove.
    • mark used bearing shells for reinstallation but not on the running surface.
    • Replace the bearing shells worn down to the base layer.
    • Insert new bearing shells for cylinder block with proper color marking, refer to Fig 3.

Fig 2: Guide Frame, Bolt Installation Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Install both dowel sleeves into the cylinder block.

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

Fig 3: Application Of Crankshaft Bearing Shells For Cylinder Block

Courtesy of AUDI OF AMERICA, LLC

Bearing shells with the correct thickness are allocated to the cylinder block in the factory. Colored dots on bearing shells serve for identifying bearing shell thickness.

Allocation of bearing shells to cylinder block is identified with a letter by each bearing.

Fig 4: Allocation of Crankshaft Bearing Shells for the Guide Frame

Courtesy of AUDI OF AMERICA, LLC

• Bearing shells with correct thickness are allocated to bearing cap at factory. Colored dots on bearing shells serve for identifying bearing shell thickness.
• Allocation of bearing shells to crankshaft is identified with sequence of letters on crankshaft side. The prefix "1" -arrow- indicates color code for bearing 1.