Overview - Crankshaft

• For assembly work, secure the engine on the Engine and Transmission Holder. Refer to ENGINE, SECURING TO ENGINE AND TRANSMISSION HOLDER .

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1. Cylinder Block
2. Bolt
   • Tightening Specifications and Sequence. Refer to Fig 1.
   • Replace after removing.
   • Use the old bolts for radial clearance measurement
3. 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 .
   • Perform the adaptation after removing or replacing. Refer to Vehicle Diagnostic Tester 01 - Engine electronics, functions  , 01 - Chain length diagnostic adaptation 
4. Alignment Sleeves
5. Bolt
   • Tightening Specifications and Sequence. Refer to Fig 1.
   • Replace after removing.
   • Use the old bolts for radial clearance measurement
6. Bearing Cap
   • Bearing cap "1" : belt pulley side
   • Installation position: bearing shell retaining tabs in cylinder block and in bearing shells must align
7. Bolt
   • Tightening Specifications and Sequence. Refer to Fig 1.
   • Replace after removing.
8. Bearing Shell
   • Replace any worn bearing shells
   • For bearing cap without oil groove
   • Insert the new bearing shells with the correct color coding. Refer to Fig 3
9. Thrust Washers
   • For bearing "5"
10. Needle Bearing
    • Replacing. Refer to CRANKSHAFT NEEDLE BEARING, REPLACING .
11. Alignment Pin
12. Thrust Washers
    • For bearing "5"
13. Bearing Shell
    • For cylinder block with oil groove
    • Replace any worn bearing shells
    • Insert new cylinder block bearing shells with the correct color coding. Refer to Fig 2
14. Seal
    • Not available separately in the delivery package -item  15
15. Plug
    • 30 Nm

Bearing Cap - Tightening Specification and Sequence

Fig 1: Bearing Cap - Tightening Specification and Sequence

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

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

Allocation of the Crankshaft Bearing Shells for the Cylinder Block

Fig 2: Identification Of Top Crankshaft Bearing Shells

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• Bearing shells with the correct thickness are allocated to the cylinder block in the factory. The color marks on the sides of the bearing shell mark the bearing shell thickness.
• Which bearing thickness is inserted in which location is marked on the side of the cylinder block with letters. The first letter of the row of letters represents bearing "1", the second letter is for bearing "2", etc.

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Allocation of Crankshaft Bearing Shells for Bearing Cap

Fig 3: Allocation, Lower Bearing Shells (Bearing Cap)

Courtesy of AUDI OF AMERICA, LLC

• Bearing shells with correct thickness are allocated to bearing cap at factory. The color marks on the sides of the bearing shell mark the bearing shell thickness.
• The allocation of the bearing shells to the bearing cap is marked on the crankshaft transmission flange by a row of letters. The first letter of the row of letters represents bearing "1", the second letter is for bearing "2", etc.

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