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: Exploded View Of Crankshaft

Courtesy of AUDI OF AMERICA, LLC

1. Cylinder Block
2. Bracket
   • For the vacuum reservoir
3. Plug
   • For the "TDC" -hole
   • There are different versions. Refer to Fig 2 for allocation and tightening specifications.
4. O-Ring
   • Replace after removing.
   • For plug version "A". Refer to Fig 2
5. Bolt
   • Tightening Specifications and Sequence. Refer to Fig 4.
   • Always replace after removing.
6. 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
7. Alignment Sleeve
8. 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 .
   • Removing and installing. Refer to CRANKSHAFT, REMOVING AND INSTALLING .
   • When installing a new crankshaft replace the alignment sleeve -item  ) OVERVIEW - CRANKSHAFT - List Item: Alignment Sleeve and alignment pin -item  ) OVERVIEW - CRANKSHAFT - List Item: Alignment Pin.
   • Pay attention to the installation position of the balance shaft
9. 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 Vehicle Diagnostic Tester and MAIN BEARING SHELLS ALLOCATION .
   • Lubricate with engine oil
10. Alignment Sleeve
    • Quantity 2 per bearing cap
11. Bearing Cap
    • Allocation. Refer to Fig 3.
    • Retaining tabs for cylinder block/bearing cap bearing shells must lie above one another
12. Bolt
    • Tightening Specifications and Sequence. Refer to Fig 4.
    • Always replace after removing.
    • Use the old bolts for radial clearance measurement
13. Thrust Washers
    • Only on the crankshaft bearing "3"
    • Installation position: the oil grooves face outward
    • Note installation position in the guide frame
14. Alignment Pin
15. Thrust Washers
    • Only on the crankshaft bearing "3"
    • Installation position: the oil grooves face outward
16. Bolt
    • Tightening Specifications and Sequence. Refer to Fig 4.
    • Always replace after removing.

Plug for TDC Hole Allocation and Tightening Specifications 

Fig 2: Plug for "TDC" Hole Allocation

Courtesy of AUDI OF AMERICA, LLC

-- Clean the threaded hole in the cylinder block.

Plug Version "A" : 

-- Replace the O-ring after removing.

-- Clean the plug and tighten with a new O-ring to 25 Nm.

Plug Version "B" : 

-- Replace the plug after removal.

-- Tighten the plug to 40 Nm.

Bearing Cap Allocation 

Fig 3: Bearing Cap Allocation

Courtesy of AUDI OF AMERICA, LLC

-- Allocate the bearing cap -1 to 4- as shown.

Bearing Cap - Tightening Specifications and Sequence 

Fig 4: Bearing Cap - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

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

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