11 21 500 Replacing crankshaft (S63)

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2018 BMW M6, 2018 BMW 650i xDrive, 2018 BMW 650i, 2018 BMW 640i xDrive, and 2018 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

IMPORTANT: Weight of crankshaft is approx. 20 kg.
Risk of injury from sharp crankcase edges.

Necessary preliminary work:

Remove engine
Mount engine on assembly stand
Remove cylinder head.
Remove hub for vibration damper
Removing lower timing case cover
Removing oil pan
Remove oil pump
Removing PISTONS
Remove flywheel
Remove radial shaft seals
Remove timing chains

Installation note:

Layout of main bearing caps.

All numbers must be read from the cylinder bank (5 to 8) (see arrows in illustration).

Fig 1: Identifying Main Bearing Caps

Courtesy of BMW OF NORTH AMERICA, INC.

Main bearing caps (1 to 5) opposite the output end on the timing chain drive.

Fig 2: Identifying Main Bearing Caps

Courtesy of BMW OF NORTH AMERICA, INC.

Release oil pump spacer bolts (1) with special tool 13 5 020 .

Fig 3: Releasing Oil Pump Spacer Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Release main bearing taper screw connection (1).

Release oil pump spacer pins (2).

Fig 4: Identifying Oil Pump Spacer Pins And Main Bearing Taper Screw Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Release all thread support bushings (1).

Fig 5: Identifying Thread Support Bushings

Courtesy of BMW OF NORTH AMERICA, INC.

Release collar bolts (M8) in sequence 10 to 1.

Fig 6: Crankshaft Bolts (M8) Tightening/Loosening Sequence (S63)

Courtesy of BMW OF NORTH AMERICA, INC.

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).

Fig 7: Crankshaft Bolts (M11) Tightening/Loosening Sequence (S63)

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw for oil nozzle (1).

Tightening torque: 11 11 8 AZ.

Fig 8: Identifying Screw For Oil Nozzle

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Check oil nozzle (1) for clear passage with compressed air.

Observe fastening on oil nozzle.

Fig 9: Locating Oil Nozzle

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Observe fastening in crankcase.

Fig 10: Identifying Installed Oil Nozzle

Courtesy of BMW OF NORTH AMERICA, INC.

Replace CRANKSHAFT MAIN BEARING SHELLS .

Installation note:

Observe arrangement of main bearing caps.

All numbers must be read from the cylinder bank (5 to 8) (see arrows in illustration).

Fig 11: Identifying Main Bearing Caps

Courtesy of BMW OF NORTH AMERICA, INC.

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).

Fig 12: Identifying Main Bearing Caps

Courtesy of BMW OF NORTH AMERICA, INC.

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).

Fig 13: Crankshaft Bolts (M11) Tightening/Loosening Sequence (S63)

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 14: Identifying Mark On Collar Bolt Heads

Courtesy of BMW OF NORTH AMERICA, INC.

Secure collar bolt (1) with special tool 00 9 120 .

Tightening torque: 11 11 1AZ .

Fig 15: Tightening Collar Bolts Of Main Bearing Caps

Courtesy of BMW OF NORTH AMERICA, INC.

Insert all collar bolts (M8) hand-tight.

Secure collar bolts (M8) in sequence (1 to 10).

Fig 16: Crankshaft Bolts (M8) Tightening/Loosening Sequence (S63)

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 17: Identifying Mark On Collar Bolt Heads

Courtesy of BMW OF NORTH AMERICA, INC.

Secure collar bolt (1) with special tool 00 9 120 .

Fig 18: Securing Collar Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

Secure all threaded support sleeves (1) with special tool 11 4 350 .

Tightening torque: 11 11 3 AZ.

Fig 19: Securing Threaded Support Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

Secure main bearing taper screw connection (1).

Tightening torque: 11 11 4 AZ.

Secure oil pump spacer pins (2).

Tightening torque: 11 11 5 AZ.

Fig 20: Identifying Oil Pump Spacer Pins And Main Bearing Taper Screw Connection

Courtesy of BMW OF NORTH AMERICA, INC.

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. See S63 ENGINE .

Fig 21: Rotating Crankshaft Central Bolt Using Special Tool 00 2 010

Courtesy of BMW OF NORTH AMERICA, INC.

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 axial play. See S63 ENGINE .

Fig 22: Checking Crankshaft Axial Play

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.