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, refer to => [ Sealant Application for Guide Frame, Position of Alignment Bushings ]
5 Gasket
• Replace
6 Bolt
• For guide frame to cylinder block sealing surfaces
• Varying bolt lengths and bolt heads
• Tightening specification and sequence, refer to => [ Installing Guide Frame ]
7 Bolt
• Replace
• Long, large shoulder
• For inner row of guide frame
• Tightening specification and sequence, refer to => [ Installing Guide Frame ]
8 Bolt
• Short, small shoulder
• For outer row of guide frame
• Tightening specification and sequence, refer to => [ Installing Guide Frame ]
9 Bearing Bracket
• With oil pressure regulation valve (N428) => [ ]
• To remove, remove timing chain guide rail - item 1 - => [ (Item 1) Guide Rail ] Timing Mechanism Drive Chain Overview
• Sealant application, refer to => [ Sealant Application for Guide Frame, Position of Alignment Bushings ]
• Oil pressure regulation valve (N428) , Removing and installing, refer to => [ Oil Pressure Regulation Valve (N428) ] Oil Pressure Regulation Valve (N428)
10 Seal
• Replace
11 Thrust Washer
• Crankshaft bearing 3 only
• Installation position: the oil groove faces outward
• Note locating point in guide frame
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, refer to => [ Allocation of Crankshaft Bearing Shells for Guide Frame ]
13 Thrust Washer
• Crankshaft bearing 3 only
• Installation position: the oil groove faces outward
• Note locating point in guide frame
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, refer to => [ Allocation of Crankshaft Bearing Shells for Cylinder Block ]
15 Cylinder Block
Top Dead Center (TDC) Marking Locking Bolt - Tightening Specification
• Replace O-ring.
- Tighten the locking bolt - arrow - to 14 Nm.
Oil Pressure Regulation Valve (N428)
1. Electrical harness connector
2. O-ring - replace
3. Bolt, 9 Nm
4. Oil pressure regulation valve
Sealant Application for Guide Frame, Position of Alignment Bushings
- Clean any oil or grease off the sealing surfaces.
- 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 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
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 the sides of bearing shells serve for identifying bearing shell thickness.
• The allocation of the bearing shells for the guide frame is identified by a series of letters on the crankshaft flywheel flange. The first letter of the row of letters represents bearing "1", the second letter is for bearing "2", etc.
