11 21 001 Replacing crankshaft (B48B)

WARNING: This page is about a different car, the 2018 BMW 330i and 2017 BMW 330i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 6 250
2 288 054
00 2 010
11 6 480

Attention!

Replace main bearing with connecting rod bearing and connecting rod bolts.

When replacing the crankshaft, the main bearing shells and connecting rod bearing shells must be replaced.

There must be no oil in the blind holes (risk of cracking ).

Do not wash off bolt coating.

Incorrect assembly of the crankshaft bearing caps will result in damage to the crankcase.

Necessary preliminary work:

Remove BOTH TIMING CHAINS
Remove ALL PISTONS

Removal:

Check crankshaft SIDE CLEARANCE (AXIAL PLAY) .

Fit special tool 11 6 250 .

If the permitted side clearance is exceeded:

Check crankshaft and guide bearing shells
Replace worn components

Courtesy of BMW OF NORTH AMERICA, INC.

Lever out both sealing caps (1) with screwdriver (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Twist crankshaft to top dead center first cylinder .

Mount special tool 2 288 054 and abut screws (1).

Observe installation note in next operation!

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Make sure special tool 2 288 054 is properly seated in the guides (1) of the counterbalance shaft (2).
Slightly twist crankshaft if necessary.
Tighten special tool 2 288 054 to 20 Nm .

Courtesy of BMW OF NORTH AMERICA, INC.

Loosen screw (1) on the counterbalance shaft, intake side.

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Guide the special tool 2 288 054 out and remove.

Courtesy of BMW OF NORTH AMERICA, INC.

Slide the counterbalance shaft (1) on the intake side out of the crankshaft (2) in the direction of the arrow .

Courtesy of BMW OF NORTH AMERICA, INC.

Attention!

Carefully set the counterbalance shaft (1) on the intake side to one side.

Courtesy of BMW OF NORTH AMERICA, INC.

Position a clean lint-free cleaning rag (1) between counterbalance shaft (2) on the intake side and crankcase (3).

Ensure that needle bearing (4) is not damaged .

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Version up to production year 07/16

Slide intermediate gear (1) out and remove.

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Version from production year 07/16

Slide intermediate gear (1) out and remove.

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: All crankshaft bearing caps (1) are labelled (bearing position 1 to 5 ).
Installation position must be maintained.

Courtesy of BMW OF NORTH AMERICA, INC.

Release main bearing screw connection of main bearing cap in the sequence 10 - 1 .

Remove main bearing caps 1 - 5.

Fig 1: Main Bearing Caps Screws Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Attention!

With the assistance of a second person, remove crankshaft and carefully place to one side.

Pay attention to oil hole in bearing shell.

Pay attention to installation position of CRANKSHAFT MAIN BEARING SHELLS .

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

FOR NEW CRANKSHAFT REPLACE CRANKSHAFT MAIN BEARING SHELLS.

Oil or coat bearing shells (1-5) with fresh engine oil.

Both locating grooves of bearing shells in crankcase and on crankshaft bearing cap must be mounted on one side.

Courtesy of BMW OF NORTH AMERICA, INC.

Insert crankshaft (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Attention!

Do not fit crankshaft bearing cap in incorrect position.

Risk of damage to crankcase molding.

Align crankshaft bearing cap exactly.

Fit main bearing bolts.

Tighten main bearing bolts in sequence 1 - 10 (comply with tightening specifications).

Tightening torque: 11 11 1AZ .

Fig 2: Main Bearing Bolts Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Guide out lint-free cleaning rag (1) between counterbalance shaft (2) on the intake side and crankcase (3) and remove it.

Ensure that needle bearing (4) is not damaged .

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Move or set the crankshaft (2) to the TDC position.

Position counterbalance shaft (1) on the intake side in the direction of the arrow on crankshaft (2).

The mark on gear (1) on the intake side of the counterbalance shaft must point upwards , perpendicular to the sealing surface of oil sump (3).

Courtesy of BMW OF NORTH AMERICA, INC.

Replace screw (1).

Parts: Screw

Fasten screw (1) into the counterbalance shafts on the intake side.

NOTE: Do not tighten screw (1) since otherwise the counterbalance shafts can no longer be positioned in the next step.

Courtesy of BMW OF NORTH AMERICA, INC.

Twist crankshaft to top dead center first cylinder .

Mount special tool 2 288 054 and abut screws (1).

Observe installation note in next operation!

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Make sure special tool 2 288 054 is properly seated in the guides (1) of the counterbalance shaft (2).
Slightly twist crankshaft if necessary.
Tighten special tool 2 288 054 to 20 Nm .

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten screw (1).

Tightening torque 11 27 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) and remove special tool 2 288 054 .

Courtesy of BMW OF NORTH AMERICA, INC.

Parts: Replace sealing cap (1).

Ensure proper fit of O-ring.

Install both sealing caps (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Version up to production year 07/16

Insert Intermediate gear (1) and install.

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Version up to production year 07/16
The marks on gear (1) and also on intermediate wheel (2) must point upwards , perpendicular to the sealing surface of oil sump (3).

Mark on intermediate wheel (2) of the counterbalance shaft on the exhaust side: One square
Marking on the gear (1) of the counterbalance shaft, exhaust side: two squares

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Version from production year 07/16

Insert Intermediate gear (1) and install.

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Version from production year 07/16
The marks on gear (1) and also on intermediate wheel (2) must point upwards , perpendicular to the sealing surface of oil sump (3).

Mark on intermediate wheel (2) of the counterbalance shaft on the exhaust side: One square
Marking on gear (1) on counterbalance shaft, exhaust side: one triangle

Courtesy of BMW OF NORTH AMERICA, INC.

Move gear (1) in direction of arrow on the gear (2).

Tighten nut (3).

Tightening torque 11 27 2AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Check SIDE CLEARANCE (AXIAL PLAY) .

Courtesy of BMW OF NORTH AMERICA, INC.

Check COEFFICIENT OF FRICTION OF CRANKSHAFT .

Screw in all screws of vibration damper by hand.

Turn crankshaft evenly with special tool 00 2 010 and special tool 11 6 480 .

Courtesy of BMW OF NORTH AMERICA, INC.

Required reworking:

Install ALL PISTONS
Install BOTH TIMING CHAINS
Assemble engine