11 21 500 Replacing Crankshaft (N63O1)
Special Tools Required:
Risk of Injury From Sharp Edge of Housing.
Necessary Preliminary Tasks:
- Fully Remove FRONT AXLE Together with Engine.
- Remove Engine From Front Axle. Refer To Procedure for:
- Mount Engine On ASSEMBLY STAND .
- Remove Both Cylinder Heads. See LEFT CYLINDER HEAD or RIGHT CYLINDER HEAD .
- Remove HUB FOR VIBRATION DAMPER .
- Take Off OIL PUMP .
- Remove UPPER OIL SUMP SECTION .
- Remove LOWERING GEAR CASE COVER .
- Remove PISTONS .
- Remove FLYWHEEL .
- Remove Radial Shaft Seals. See SEALING IN LOWERING GEAR CASE COVER and SEALING ON THE TRANSMISSION SIDE .
- Remove TIMING CHAINS .
Installation Note:
Layout of Main Bearing Caps.
All Numbers Must Be Read From The Cylinder Bank (1 To 4) (See Arrows In Illustration).
Main Bearing Caps (1 To 5) Opposite The Output End On The Timing Chain Drive.
Release Main Bearing Taper Screw Mounting (1).
Release Oil Pump Spacer Bolt (2) (N63O1 Only).
Release All Threaded Support Sleeves (1).
Release Collar Bolts (M8) In Sequence 10 To 1.
Release Collar Bolts (M11) In Sequence 10 To 1.
Remove Main Bearing Caps 1 To 5.
Lift Out Crankshaft and Set Down Safely (Secure Against Turning).
Release Screw for Oil Nozzle (1).
Tightening torque: 11 11 7 AZ .
Illustration: N63.
Installation Note:
Check Oil Nozzle (1) for Clear Passage with Compressed Air.
Observe Fastening On Oil Nozzle.
Illustration: N63.
Replace CRANKSHAFT MAIN BEARING SHELLS .
Installation Note:
Note Arrangement of Main Bearing Caps (1 To 5).
All Numbers Must Be Read From The Cylinder Bank (1 To 4) (See Arrows In Illustration).
Main Bearing Caps (1) Is Opposite The Output End On The Timing Chain Drive.
Turn Back All Threaded Support Sleeves Hand-Tight.
Installation Note:
Coat All Bearing Positions with Engine Oil.
Install Crankshaft.
Fit Bearing Caps 1 To 5.
Set Down Bearing Caps Positioned From 1 To 5.
Insert All Collar Bolts (M11) Hand-Tight.
Insert Collar Bolts (M11) In Sequence (1 To 10).
Installation Note:
for A Better Overview of The Screw Connection Quality, Mark The Head of All Collar Bolts After Joining with A Line (1) Using An Oil-Proof Marker Pen.
Check Angle Tightening.
Secure Collar Bolt (1) with Special Tool 00 9 120 .
Tightening torque 11 11 1 AZ .
Insert All Collar Bolts (M8) Hand-Tight.
Secure Collar Bolts (M8) In Sequence (1 To 10).
Installation Note:
for A Better Overview of The Screw Connection Quality, Mark The Head of All Collar Bolts After Joining with A Line (1) Using An Oil-Proof Marker Pen.
Check Angle Tightening.
Secure Collar Bolt (1) with Special Tool 00 9 120 .
Tightening torque: 11 11 2AZ .
Secure All Threaded Support Sleeves (1) with Special Tool 11 4 350 .
Tightening torque: 11 11 3 AZ .
Secure Main Bearing Taper Screw Mounting (1).
Tightening torque: 11 11 4 AZ .
Check Crankshaft COEFFICIENT OF FRICTION .
Determine Crankshaft Breakaway Torque with Special Tool 00 2 010 .
Rotate Crankshaft At Central Bolt Using Special Tool 00 2 010 .
If The Breakaway Torque Is Too High, It Will Be Necessary To Correct The BEARING CLEARANCE .
Secure Special Tool 11 6 252 To Crankcase with Magnetic Base.
Slide Crankshaft In Direction of Arrow Forwards As Far As It Will Go.
Set Special Tool 11 6 251 To Zero.
Slide Crankshaft (1) In Direction of Arrow Towards Rear and Determine Value.
Check SIDE CLEARANCE .
Assemble Engine.