Cylinder Block Assembly: Service and Repair
11 21 500 - Replacing crankshaft (N63)
Special tools required:
- 00 2 010
- 00 9 120
- 11 4 350
- 11 6 251
- 11 6 252
- 13 5 020
Important!
Weight of crankshaft is approx. 20 kg.
Risk of injury from sharp crankcase edges.
Necessary preliminary tasks:
- Remove engine 11 00 050 Removing and Installing/Replacing Engine.
- Mount engine on assembly stand.
- Remove cylinder head.
- Remove hub for vibration damper Service and Repair.
- Remove lower timing case cover.
- Remove oil sump.
- Remove oil pump Service and Repair.
- Remove pistons.
- Remove flywheel 11 22 000 Removing and Installing/Replacing Flywheel.
- Remove radial shaft seals.
- Remove timing chains Service and Repair.
Installation Note:
Layout of main bearing caps.
All numbers must be read from the cylinder bank (5 to 8) (see arrows).
Main bearing caps (1 to 5) opposite the output end on the timing chain drive.
Release oil pump spacer pins (1) with special tool 13 5 020 .
Release main bearing taper screw connection (1).
Release oil pump spacer pins (2).
Release all thread support bushings (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.
Important!
Remove crankshaft with a 2nd person, weight approx. 25 kg.
Lift out crankshaft and set down safely (secure against turning).
Release screw for oil nozzle (1).
Tightening torque: 11 11 8AZ. 11 11 Engine Block
Installation Note:
Check oil nozzle (1) for clear passage with compressed air.
Observe fastening on oil nozzle.
Installation Note:
Observe fastening in crankcase.
Replace main crankshaft bearing shells [1][2]11 21 531 Replacing All Crankshaft Main Bearing Shells Without Hybrid Drive.
Installation Note:
Observe arrangement of main bearing caps.
All numbers must be read from the cylinder bank (5 to 8) (see arrows).
Main bearing caps (1) is opposite the output end on the timing chain drive.
Turn back all thread support bushings hand-tight.
Installation Note:
Coat all bearing points with engine oil.
Important!
Install crankshaft with a 2nd person, weight approx. 25 kg.
Install crankshaft.
Fit bearing caps (1 to 5).
Set down bearing caps positioned from 1 to 5.
Insert all collar bolts (M11) hand-tight.
Secure 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 1AZ 11 11 Engine Block.
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.
Secure all thread support bushings (1) with special tool 11 4 350.
Tightening torque: 11 11 3AZ. 11 11 Engine Block
Secure main bearing taper screw connection (1).
Tightening torque: 11 11 4AZ. 11 11 Engine Block
Secure oil pump spacer pins (2).
Tightening torque: 11 11 5AZ. 11 11 Engine Block
Check crankshaft coefficient of friction 11 21 Crankshaft and Bearings.
Determine crankshaft breakaway torque with special tool 00 2 010 .
Rotate crankshaft at central bolt with 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 with magnetic foot on crankcase.
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 axial play.
Assemble engine.