BMW X5 Owners & Service Manuals

BMW X5: Crankshaft With Bearings

REPLACING CRANKSHAFT (N62/N62TU)

REFERENCE CHART

Operation

Release main bearing inclined screw connection (1).

Installation:

Tightening torque 11 11 3AZ.

Crankshaft With Bearings
Fig. 132: Identifying Main Bearing Inclined Screw Connection

Release spacer bolt (2).

Tightening torque 11 11 3AZ.

Release main bearing screws.

Tightening torque 11 11 2AZ.

Crankshaft With Bearings
Fig. 133: Locating Spacer Bolt

Remove main bearing caps 1 to 5.

Lever out crankshaft.

Crankshaft With Bearings
Fig. 134: Identifying Main Bearing Caps

Replace main crankshaft bearing shells.

Replace conrod bearing shells.

REPLACING ALL MAIN CRANKSHAFT BEARING SHELLS (N62/N62TU)

Special tools required:

Necessary preliminary tasks:

NOTE: Install main bearing shells (1) with lubrication groove in crankcase.

Install main bearing shells (2) without lubrication groove in the main bearing caps.

Crankshaft With Bearings
Fig. 135: Identifying Main Bearing Shells

The letter (1) denotes the crankshaft construction stage.

S= Series
B= Construction stage 1
C= Construction stage 2

The numbers (2) denote the bearing shell classification for the relevant bearing position from 1 to 5 (main bearing cap).

1= yellow
2= green
3= violet

Crankshaft With Bearings
Fig. 136: Identifying Letter Crankshaft Construction Stage

The letters (1) denote the bearing shell classification for the relevant bearing position from 1 to 5 in the crankcase and is located on the transmission side in the Vee. The first letter on the left applies to the first bearing position at the front.

Y= yellow
G= green
V= violet

Crankshaft With Bearings
Fig. 137: Identifying Letters Bearing Shell Classification

NOTE: Main bearing caps (1, 2 and 3) are identified with punch numbers.

Main bearing caps (4 and 5) are not identified.

Crankshaft With Bearings
Fig. 138: Identifying Main Bearing Caps

NOTE: Main bearing cap number 5 can be identified by the surfaces (1) for the stop disks of the thrust bearing.

Crankshaft With Bearings
Fig. 139: Identifying Main Bearing Cap Number Surfaces

Unscrew thread support bushings in main bearing caps.

Crankshaft With Bearings
Fig. 140: Identifying Thread Support Bushings In Main Bearing Caps

Checking main bearing clearance:

To check crankshaft bearing clearance, use old main bearing screws.

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

Do not twist crankshaft.

Fit special tool 00 2 590 (Plastigage Type PG 1) to the oil-free crankshaft.

Crankshaft With Bearings
Fig. 141: Locating Main Bearing Clearance

1. Tighten all screws on main bearing cover with jointing torque.

2. Tighten down all screws on main bearing caps with special tool 00 9 120 and torsion angle.

Tightening torque, 11 11 2AZ.

Crankshaft With Bearings
Fig. 142: Identifying Special Tool (00 9 120)

Remove main bearing cap.

Read off main bearing play at width of flattened plastic thread with assistance of measurement scale.

Main bearing play.

Crankshaft With Bearings
Fig. 143: Locating Main Bearing Cap

NOTE: Always replace main bearing bolts of main bearing caps with new bolts.

Do not wash off bolt coating.

No oil is permitted in the blind bores! (Danger of cracking).

Tightening specifications for main bearing:

1. Tighten all screws on main bearing cover with jointing torque.

2. Unfasten screws on main bearing cover 5.

3. Strike back and front of crankshaft with plastic hammer to center thrust bearing (do not damage crankshaft).

Check axial play.

Check guide bearing shell, crankshaft and crankcase if necessary.

4. Tighten screws of main bearing cover 5 with jointing torque.

5. Tightening torque 11 11 2AZ.

Crankshaft With Bearings
Fig. 144: Checking Axial Play

Tighten down all screws on main bearing caps with special tool 00 9 120 and torsion angle.

Tightening torque, 11 11 2AZ.

Tighten down thread support bushings (2).

Tightening torque, 11 11 3AZ.

Crankshaft With Bearings
Fig. 145: Locating Spacer Bolt

Replace flanged head screws (1) and tighten down.

Tightening torque, 11 11 3AZ.

Crankshaft With Bearings
Fig. 146: Identifying Main Bearing Inclined Screw Connection

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