11 21 500 Replacing crankshaft (M57T2-SCR)

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 9 120

Necessary preliminary tasks:

Remove ENGINE
Remove GEAR CASE COVER
Remove OIL PUMP
Remove rear END COVER
Remove CONNECTING ROD BEARING

IMPORTANT: Renew main bearing and connecting rod bolts.
Renew main bearing and connecting rod bearing shells.
There must be no oil in the blind holes (risk of cracking) .

Release screws.

Tightening torque: 11 00 4AZ .

Take off reinforcing shell (1).

Fig 1: Locating Reinforcing Shell Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Check crankshaft side clearance.

Side clearance . See 1121 CRANKSHAFT AND BEARINGS (M57T2, TOP/SCR, D30) .

If the permitted side clearance is exceeded:

Check crankshaft and guide bearing shells.
Replace work parts.

Fig 2: Checking Crankshaft Side Clearance
Courtesy of BMW OF NORTH AMERICA, INC.

Release the main bearing screw connection from the outside to the inside.

Remove main bearing caps 1...7.

IMPORTANT: Remove crankshaft and set aside carefully.

Fig 3: Identifying Main Bearing Caps

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Bearing caps 1...5 are marked on the exhaust side.
The bearing caps 6 and 7 are not marked.

Bearing cap 6 is installed as a guide bearing.

IMPORTANT: Pay attention to oil hole in bearing shell.
Pay attention to installation position of crankshaft bearing shells.

Fig 4: Identifying Main Bearing Cap 6 In Guide Bearing

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Coat bearing shells with oil.

Install crankshaft.

Mount bearing caps 1...7 in such a way that the grooves of the bearing shell guide are on one side.

Align bearing cap exactly.

Fig 5: Locating Main Bearing Shell Guide Grooves

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening specifications for main bearing:

Tighten all screws on main bearing cap with jointing torque.
Loosen the screws on the main bearing cap 6.
Strike back and front of crankshaft with plastic hammer to center guide bearing (do not damage crankshaft).

Fig 6: Tightening Screws On Main Bearing Cap
Courtesy of BMW OF NORTH AMERICA, INC.
Tighten bolts of main bearing cap no. 6 to jointing torque.
Tighten down all screws on main bearing caps with special tool 00 9 120 to angle of rotation.
Tightening torque: 11 11 1AZ .

Check side clearance . See 1121 CRANKSHAFT AND BEARINGS (M57T2, TOP/SCR, D30) .

Fig 7: Checking Crankshaft Side Clearance

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.