Crankshaft: Service and Repair

Crankshaft Overview

• For assembly work, secure the engine on the engine and transmission holder (VAS 6095). Refer to => [ Engine, Securing to Engine and Transmission Holder ] Procedures.






1 Sealing Flange (belt pulley side)

• Removing and installing, refer to => [ Sealing Flange with Crankshaft Seal, Belt Pulley Side ] Service and Repair.

2 Bolt

• Tightening specification and sequence, refer to => [ Ribbed Belt Pulley Side Sealing Flange
- Tightening Specifications and Sequence ] Ribbed Belt Drive Overview

3 Crankshaft

• Measuring axial play, refer to => [ Crankshaft, Measuring Axial Play ] Crankshaft, Measuring Axial Play

• Radial clearance, measuring, refer to => [ Crankshaft, Measuring Radial Play ] Crankshaft, Measuring Radial Play

• Crankshaft dimensions, refer to => [ Crankshaft Dimensions ] [1][2]Crankshaft, Engine

4 Alignment Bushing

• 4 pieces

• Insert into guide frame

5 Gasket

• Replace

6 Bolt

• For guide frame to cylinder block sealing surfaces

• Varying bolt lengths and bolt heads

7 Long Bolt, Large Shoulder

• Replace

• For inner row of guide frame

8 Short Bolt, Small Shoulder

• For outer row of guide frame

9 Bearing Bracket

• With oil pressure regulation valve (N428) => [ ] Upper and Lower Oil Pan, Oil Pump and Oil Cooler Overview

• To remove, remove timing chain guide rail => [ (Item 1) Guide Rail ] Timing Mechanism Drive Chain Overview

• Oil pressure regulation valve, removing and installing, refer to => [ Oil Pressure Regulation Valve ] Oil Pressure Regulation Valve

10 Seal

• Replace

11 Thrust Washer

• Only on 3rd crankshaft bearing

• Lubricating grooves face outward

• Note locating point in guide frame

• Measuring crankshaft axial clearance, refer to => [ Crankshaft, Measuring Axial Play ] Crankshaft, Measuring Axial Play

12 Bearing Shell

• For guide frame without lubricating groove

• Replace any worn bearing shells

• Note installation position

• Insert new bearing shells for guide frame with proper color marking

13 Thrust Washer

• Only on 3rd crankshaft bearing

• Lubricating grooves face outward

• Pay attention to the locating point on the cylinder block

• Measuring crankshaft axial clearance, refer to => [ Crankshaft, Measuring Axial Play ] Crankshaft, Measuring Axial Play

14 Bearing Shell

• For cylinder block with oil groove

• Replace any worn bearing shells

• Note installation position

• Insert new bearing shells for cylinder block with proper color marking

15 Cylinder Block

Locking Bolt "TDC" Mark Crankshaft, Tightening Specification





• Replace sealing ring.

- Tighten the locking bolt - arrow - to 14 Nm.

Sealant Application for Guide Frame, Position of Alignment Bushings





- Clean the sealing surfaces; they must be top and bottom free from oil and grease.

- Apply sealant beads - arrows - to the clean sealing surfaces on the guide frame as shown in the illustration.

• The groove of sealing surface must be completely filled with sealant.

• The sealant beads must be 1.5 to 2.0 mm above the sealing surface.

- Position seals - 1 - and - 2 -.

- Check if alignment bushings - 3 through 6 - are inserted at the locations in the guide frame as shown in the illustration.

Installing Guide Frame





• Replace bolts which have been tightened to an additional torque.

- Insert the long bolts in the inner row of the guide frame.

- Tighten the bolts in 3 steps according to the tightening sequence:






Allocation of Crankshaft Bearing Shells for Cylinder Block





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

• Allocation of bearing shells to cylinder block is marked by a letter on the respective bearing on guide frame items - 1 through 4 -.






Allocation of Crankshaft Bearing Shells for Guide Frame





• Bearing shells with the correct thickness are allocated to the guide frame in the factory. Colored dots on sides of bearing shells serve for identifying bearing shell thickness.

• Allocation of bearing shells to guide frame is marked on transmission flange of crankshaft by a row of letters. The first letter of the row of letters represents bearing "1", the second letter is for bearing "2", etc.