Overview - Crankshaft

Fig 1: Exploded View Of Crankshaft

Courtesy of AUDI OF AMERICA, LLC

1. Cylinder Block
2. O-Ring
   • Replace if damaged or leaking
3. Plug
   • For the "TDC" -hole
   • 30 Nm
4. Bolt
   • Replace after removing
   • Tightening Specifications and Sequence. Refer to Fig 3.
5. Bearing Shell
   • For cylinder block with oil groove
   • Replace any worn bearing shells
   • Insert new bearing shells for bearing cap with proper color marking. Refer to MAIN BEARING SHELLS ALLOCATION .
   • Lubricate with engine oil
6. Crankshaft
   • There are different versions. Refer to the Parts Information for the allocation.
   • For assembly work secure the engine on the engine and transmission holder. Refer to ENGINE, SECURING TO ENGINE AND TRANSMISSION HOLDER .
   • Axial play, measuring. Refer to CRANKSHAFT, MEASURING AXIAL CLEARANCE .
   • Radial play, measuring. Refer to CRANKSHAFT, MEASURING RADIAL CLEARANCE .
   • Crankshaft dimensions. Refer to CRANKSHAFT DIMENSIONS .
   • Removing and Installing. Refer to CRANKSHAFT, REMOVING AND INSTALLING .
   • When installing a new crankshaft alignment pin -Item  12-.
7. Bearing Shell
   • For bearing cap without oil groove
   • Replace any worn bearing shells
   • Insert new bearing shells for bearing cap with proper color marking. Refer to MAIN BEARING SHELLS ALLOCATION .
   • Lubricate with engine oil
8. Alignment Sleeve
   • Quantity 2 per bearing cap
9. Bearing Cap
   • Allocation. Refer to Fig 2.
   • Retaining tabs for cylinder block/bearing cap bearing shells must lie above one another
10. Bolt
    • Replace after removing
    • Use the old bolts for radial clearance measurement
    • Tightening Specifications and Sequence. Refer to Fig 3.
11. Thrust Washers
    • Only on crankshaft bearing "4"
    • Installation position: the oil grooves face outward
    • Pay attention the bearing cap is secured
12. Alignment Pin
13. Thrust Washers
    • Only on crankshaft bearing "4"
    • Installation position: the oil grooves face outward
14. Bolt
    • Replace after removing
    • Tightening Specifications and Sequence. Refer to Fig 3.

Bearing cap allocation

Fig 2: Bearing Cap Allocation

Courtesy of AUDI OF AMERICA, LLC

-- Allocate the bearing cap -1 to 5- as shown.

Bearing Cap - Tightening Specifications and Sequence

Fig 3: Bearing Cap - Tightening Specifications and Sequence

Courtesy of AUDI OF AMERICA, LLC

Part 1

• Replace bolts that were tightened with an additional turn after removing them.

-- Tighten the bolts -1 through 20- in stages as shown:

Part 2

Fig 4: Bearing Cap Tightening Sequence (2 of 2)

Courtesy of AUDI OF AMERICA, LLC

• Replace bolts that were tightened with an additional turn after removing them.

-- Tighten the bolts -1 through 10- in steps as shown: