Overview - Crankshaft
WARNING: This page is about a different car, the 2015 Audi S7, 2015 Audi RS 7, 2014 Audi S7, 2014 Audi RS 7, and 2013 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For assembly work, secure the engine on the Engine And Transmission Holder VAS 6095, refer to ENGINE, SECURING ON ENGINE AND TRANSMISSION HOLDER .
- Cylinder Block
- Paired to item -5-.
- Sealant applied on cylinder block (for guide frame), refer to Fig 3
- Shaft Seal
- For crankshaft - belt pulley side
- Replacing, refer to CRANKSHAFT SEAL, REPLACING, BELT PULLEY SIDE .
- Crankshaft
- Different versions. For the correct 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 .
- Alignment Sleeve
- Quantity: 2
- Insert in cylinder block
- Installed position, refer to Fig 4
- Guide Frame
- Paired to item -1-.
- Remove the guide rail for the timing mechanism drive chain -item 1- in OVERVIEW - TIMING MECHANISM DRIVE CHAIN prior to removal.
- Remove the oil filter before removing, refer to ENGINE OIL, DRAIN, REPLACE OIL FILTER (8-CYLINDER GASOLINE ENGINE)CAUTION:
- Do not loosen the cross bolts in the guide frame.
- Install with sealant (on the cylinder block), refer to Fig 3; for the correct sealant .
- Bolts
- For guide frame
- Replacing
- Use old bolts to measure radial play.
- Insert the long bolts in the interior and the short bolts in the exterior.
- Tightening specification and sequence, refer to Fig 5.
- Bolt
- Replacing
- Tightening specification and sequence, refer to Fig 2.
- Baffle Plate
- Bolt
- For guide frame to cylinder block sealing surfaces
- There are different bolt lengths
- Tightening sequence, refer to Fig 5
- Thrust Washers
- Only on crankshaft bearing 4
- Installed position: lubricating grooves face outward
- Note locating point in guide frame
- Bearing Shell
- For guide frame without lubricating groove
- Replace any worn bearing shells
- Install the new bearing shells for the guide frame with the correct color identification: new crankshaft, refer to MAIN BEARING SHELLS, NEW CRANKSHAFT, ALLOCATING , worn and reworked crankshaft, refer to MAIN BEARING SHELLS, USED AND REWORKED CRANKSHAFTS, ALLOCATING
- Do not interchange the central bearing shell for crankshaft bearings 1 through 4 with eccentric crankshaft bearing 5 .
- eccentric bearing shell for crankshaft bearing 5 with offset position for the locating tab
- Bearing Shell
- For cylinder block with oil groove
- Replace any worn bearing shells
- Install the new bearing shells for the cylinder block with the correct color marking: new crankshaft, refer to MAIN BEARING SHELLS, NEW CRANKSHAFT, ALLOCATING , worn or reworked crankshaft, refer to MAIN BEARING SHELLS, USED AND REWORKED CRANKSHAFTS, ALLOCATING
- Do not interchange the central bearing shell for crankshaft bearings 1 through 4 with eccentric crankshaft bearing 5 .
- eccentric bearing shell for crankshaft bearing 5 with offset position for the locating tab
- Thrust Washers
- Only on crankshaft bearing 4
- Installed position: lubricating grooves face outward
- O-Ring
- Replacing
- Seals
- Replacing
NOTE:
Replace any bolts that were tightened with an additional turn.
-- Tighten the bolts in steps in the sequence shown:
| Step | Bolts | Tightening specification/additional turn |
|---|---|---|
| 1. | -1 to 6- | 5 Nm |
| 2. | -1 to 6- | Tighten an additional 90° |
-- Clean any oil or grease off the sealing surfaces.
CAUTION:
The lubrication system could be plugged with excess sealant.
- Do not apply sealant beads thicker than indicated.
-- Apply sealant beads -arrows- to the clean sealing surfaces as shown in the illustration.
- Thickness of sealant beads: 2.0 mm.
-- Place the seals -1, 2, 4- and O-ring -3-.
NOTE:
The guide frame must be installed within 5 minutes after applying the sealant.
-- If there are no alignment bushings -arrows- at the locations marked in the cylinder block, insert them.
- Glide track -item 1- in OVERVIEW - TIMING MECHANISM DRIVE CHAIN for the timing mechanism drive chain is removed.
- The oil filter is removed, refer to ENGINE OIL, DRAIN, REPLACE OIL FILTER (8-CYLINDER GASOLINE ENGINE) .
NOTE:
Replace any bolts that were tightened with an additional turn.
-- Insert the long bolts in the interior and the short bolts in the exterior.
-- Tighten the bolts in steps in the sequence shown:
| Step | Bolts | Tightening specification/additional turn |
|---|---|---|
| 1. | -1 through 10- | 30 Nm |
| 2. | -11 to 20- | 30 Nm |
| 3. | -1 through 10- | 50 Nm |
| 4. | -1 through 10- | Tighten an additional 90° |
| 5. | -11 to 20- | 50 Nm |
| 6. | -11 to 20- | Tighten an additional 90° |
| 7. | without numbering in the illustration | 9 Nm diagonally |