Crankshaft: Service and Repair
Crankshaft Overview
• For assembly work, secure the engine to the engine and transmission holder (VAS 6095). Refer to => [ Engine, Securing to ] Procedures.
1 Sealing Flange, Belt Pulley Side
• Removing and installing, refer to => [ Sealing Flange with Seal, Belt Pulley Side ] Service and Repair.
2 Bolt
• Tightening specification and sequence, refer to => [ Sealing Flange with Seal, Belt Pulley Side ] Service and Repair.
3 Crankshaft
• Checking the axial play, refer to => [ Crankshaft Axial Play, Checking ] Crankshaft Axial Play, Checking.
• Checking the radial clearance, refer to => [ Crankshaft Radial Play, Checking ] Crankshaft Radial Play, Checking.
• Crankshaft dimensions, refer to => [ Crankshaft Dimensions ] Specifications.
4 Alignment Bushing
• Quantity: 4
• Installed into the guide frame, refer to => [ Guide Frame Sealant Application, Position of Alignment Bushings ].
5 Gasket
• Always replace.
6 Bolt
• For guide frame to cylinder block.
• Varying bolt lengths and bolt heads.
• Tightening sequence, refer to => [ Guide Frame, Installing ].
7 Long Bolt, Large Shoulder
• For the inner row of the guide frame.
• Always replace.
• Tightening sequence, refer to => [ Guide Frame, Installing ].
8 Short Bolt, Small Shoulder
• For the outer row of the guide frame.
• Tightening sequence, refer to => [ Guide Frame, Installing ].
9 Guide Frame
• With the oil pressure regulation valve.
• To remove, remove the timing chain guide rail => [ (Item 1) Guide Rail ] Timing Mechanism Drive Chain Overview.
• Sealant application, refer to => [ Guide Frame Sealant Application, Position of Alignment Bushings ].
• Oil pressure regulation valve removing and installing. Refer to => [ Oil Pressure Regulation Valve N428 ] Oil Pressure Regulation Valve N428.
10 Seal
• Always replace.
11 Thrust Washer
• Only on the 3rd crankshaft bearing.
• Lubricating grooves face outward.
• Note the locating point in the guide frame.
• Checking the crankshaft axial clearance, refer to => [ Crankshaft Axial Play, Checking ] Crankshaft Axial Play, Checking.
12 Bearing Shell
• For the guide frame, without a lubricating groove.
• Mark used bearing shells for reinstallation, but not on the running surface.
• Replace bearing shells that have worn down to the base layer.
• Pay attention to the installed position.
• Install new bearing shells for the guide frame with the proper colored mark. Refer to => [ Crankshaft Bearing Shell to Guide Frame Allocation ].
13 Thrust Washer
• Only on the 3rd crankshaft bearing.
• Lubricating grooves face outward.
• Pay attention to the locating point on the cylinder block.
• Checking the crankshaft axial clearance, refer to => [ Crankshaft Axial Play, Checking ] Crankshaft Axial Play, Checking.
14 Bearing Shell
• For the cylinder block, with a lubricating groove.
• Mark used bearing shells for reinstallation, but not on the running surface.
• Replace bearing shells that have worn down to the base layer.
• Pay attention to the installed position.
• Install new bearing shells for the cylinder block with the proper colored mark. Refer to => [ Crankshaft Bearing Shell to Cylinder Block Allocation ].
15 Cylinder Block
Top Dead Center (TDC) Plug
• The plug is under the left engine mount bracket.
• Replace the seal.
- Tighten the plug - arrow - to 14 Nm.
Guide Frame Sealant Application, Position of Alignment Bushings
- Clean the sealing surfaces; they must be free of oil and grease.
- Apply the sealant beads - arrows - to the clean sealing surfaces on the guide frame as shown in the illustration.
• The groove of the sealing surface must be completely filled with sealant.
• The sealant beads must be 1.5 to 2.0 mm above the sealing surface.
- Install the seals - 1 and 2 -.
- Check if the alignment bushings - 3 through 6 - are installed at the locations in the guide frame as shown in the illustration.
Guide Frame, Installing
- Replace the guide frame bolts - 1 through 16 -.
- Insert the long bolts in the inner row of the guide frame.
- Tighten the bolts - 1 through 31 - in 3 passes as follows:
Crankshaft Bearing Shell to Cylinder Block Allocation
• Bearing shells with the correct thickness are allocated to the cylinder block by the factory. Colored dots on the sides of the bearing shells serve for identifying the bearing shell thickness.
• Allocation of the bearing shells to the cylinder block is marked by a letter on the respective bearing on the guide frame - 1 through 4 -.
Crankshaft Bearing Shell to Guide Frame Allocation
• Bearing shells with the correct thickness are allocated to the guide frame by the factory. Colored dots on the sides of the bearing shells serve for identifying the bearing shell thickness.
• The allocation of the bearing shells for the guide frame is identified by a series of letters on the crankshaft flange. The first letter in the row of letters represents bearing "1", the second letter is for bearing "2", etc.
