11 21 531 Replacing all main crankshaft bearing shells (N62/N62TU)

WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see MAINTENANCE & GENERAL INFORMATION - SPECIAL TOOLS - 5-SERIES (E60) .

Special Tools Required:

00 2 590
00 9 120

Necessary Preliminary Tasks:

(engine dismantled)

Clean components before installing.

Preparatory tasks are described in 11 21 500 REPLACING CRANKSHAFT (N62 / N62TU) .

NOTE: Install main bearing shells (1) with lubrication groove in crankcase. Install main bearing shells (2) without lubrication groove in the main bearing caps.

Fig 1: Identifying Types Of Main Bearing Shells

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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.

Fig 2: Locating Bearing Shell Classification And Construction Stage

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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

Fig 3: Identifying Bearing Shell Classification Letter

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NOTE: Main bearing caps (1, 2 and 3) are identified with punch numbers. Main bearing caps (4 and 5) are not identified.

Fig 4: Identifying Main Bearing Caps With Punch Numbers

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

Fig 5: Identifying Main Bearing Cap Number

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Unscrew thread support bushings in main bearing caps.

Fig 6: Locating Thread Support Bushings In Main Bearing Caps

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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 rotate crankshaft.

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

Fig 7: Checking Main Bearing Clearance

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Tighten all screws on main bearing cover with jointing torque.
Tighten down all screws on main bearing caps with special tool 00 9 120 and torsion angle.
Tightening torque, refer to 11 11 2AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 8: View Of Torsion Angle Measuring Dial
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Remove main bearing cap.

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

Main bearing play. (Refer to ENGINE - TECHNICAL DATA- 545I (4.4L) E60/N62 .)

Remove plastic thread.
Lubricate bearing shells and bearing shells.

Fig 9: Reading Off Main Bearing Play With Assistance Of Measurement Scale
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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:

Tighten all screws on main bearing cover with jointing torque.
Unfasten screws on main bearing cover 5.
Strike back and front of crankshaft with plastic hammer to center guide bearing (do not damage crankshaft).
Check axial play. Refer to ENGINE - TECHNICAL DATA- 545I (4.4L) E60/N62 .

Check guide bearing shell, crankshaft and crankcase if necessary.
Tighten screws of main bearing cover 5 with jointing torque.
Tightening torque, refer to 11 11 2AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 10: Measuring Axial Play
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Tighten down all screws on main bearing caps with special tool 00 9 120 and torsion angle.

Tightening torque, refer to 11 11 2AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Tighten down thread support bushings (2).

Tightening torque, refer to 11 11 3AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 11: Locating Main Bearing Caps Retaining Screws

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Replace flanged head screws (1) and tighten down.

Tightening torque, refer to 11 11 3AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 12: Identifying Flanged Head Screws

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