Installing the crankshaft (B48 technical update 0/1)

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Heavy components can lead to injury or damage. 

• Remove and install heavy components with the aid of another person/other persons.

• Insert and install the crankshaft (1)  .

• Observe numbering on the main bearing cap,
• Position the main bearing cap.
• Tighten the screws in the sequence (1) - (10).

Main bearing cap to crankcase
M10x1.5 Replace screws.	1. Joining torque  2. Angle of rotation  3. Angle of rotation	5 Nm 60° 60°

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

• Checking the crankshaft side clearance 

Check 

• Attach the dial gauge 0 493 144 (11 6 251)  with the tripod 0 493 145 (11 6 252)  to the engine and measure the side clearance of the crankshaft.

Axial play of crankshaft
	min. 0.060 mm max. 0.250 mm

Result 

« The side clearance is exceeded.

Measure

• Replace worn components.

• Feed out a lint-free cleaning cloth (1) between the counterbalance shaft (2) on the intake side and crankcase (3) and remove it.
• Make sure that the needle bearing (4) is not  damaged.

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

• Put crankshaft (2) in OT position  or adjust.
• Position counterbalance shaft (1) of inlet side on the crankshaft (2) in arrow direction. 
• The mark on the gear (1) of the intake for the counterbalance shaft must point upwards, vertical  to the oil sump sealing surface (3).

• Replace the screw (1).

Parts:  Screw

• Screw the screw (1) into the counterbalance shafts of the inlet side.
• Do not  tighten screw (1) as otherwise it may not be possible to position the counterbalance shafts in the next step.
• Rotate the crankshaft to the TDC of the first cylinder. 
• Mount the special tool 2 288 054  and abut the screws (1).

• Observe the correct fit of special tool 2 288 054  in the guides (1) of counterbalance shafts (2).
• If necessary, turn the crankshaft slightly.

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Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

• Tighten special tool 2 288 054. 

Special tool 2 288 054 to crankshaft
	tightening torque	20 Nm

• Tighten the screw (1) of the counterbalance shaft for the intake side.

Drive wheel to counterbalance shafts
Screw Replace screws.	1. Tightening torque  2. Angle of rotation	20 Nm 180°

• Loosen screws (1).
• Guide the special tool 2 288 054  out and remove.

• Vehicles up to year of manufacture 07/16 
• Feed in and install the idler gear (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

• Vehicles up to year of manufacture 07/16 
• The marks on gear (1) and on idler gear (2) must point upwards, perpendicular  to the oil pan sealing surface (3).
• Marking on idler gear (2) of the counterbalance shaft at exhaust side: one rectangle.
• Marking on the gear (1) of the counterbalance shaft at exhaust side: two rectangles.

• Vehicles from year of manufacture 07/16 
• Feed in and install the idler gear (1).

• Vehicles from year of manufacture 07/16 
• The marks on the gear (1) the idler gear (2) must point upwards, vertical  to the oil sump sealing surface (3).
• Marking on idler gear (2) of the counterbalance shaft at exhaust side: one rectangle.
• Marking on gear (1) on counterbalance shaft at exhaust side: a triangle.

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

• Bring the idler gear (1) into contact with the gear (2) of the crankshaft in arrow direction. 
• Tighten nut (3).

Idler gear to crankcase
M12x1.5	1. Tightening torque  2. Angle of rotation	10 Nm 45°

• Replace the sealing cap (1).

Parts:  Sealing cap

• Make sure the O-rings of the sealing cap (1) are fitted correctly.
• Mount both sealing caps (1).