BMW X5: Connecting Rod With Bearing

REPLACING ALL CONNECTING ROD BEARING SHELLS (N52K)

Special tools required:

• 00 2 590 PLASTIGAGE (5)
• 00 9 120 TORQUE ANGLE MEASURING DIAL

IMPORTANT: All crank pins are connected with the crankshaft.

The Blue / Red connecting rod bearing shell colors are no longer fitted in combination.

Necessary preliminary tasks:

• Remove oil sump

IMPORTANT: All crankshaft crank pins are classified.

Possible classifications per connecting rod at top and bottom:

r: Red

b: Blue

Only one color may be fitted per big end bearing cap and connecting rod.

In direction of arrow from (1 to 2) crank pin (1 to 6).

Example:

Possible classification: rbbrrb

Fig. 116: Connecting Rod Classifications

Cylinder Classification Red / Red

1. Cylinder Classification Blue / Blue
2. Cylinder Classification Blue / Blue
3. Cylinder Classification Red / Red
4. Cylinder Classification Red / Red
5. Cylinder Classification Blue / Blue

Release conrod bolts (1).

Remove connecting rod bearing cap (2).

Fig. 117: Conrod Bolts And Connecting Rod Bearing Cap

IMPORTANT: Risk of damage to cylinder wall and to crankshaft.

Gently release connecting rod from crankshaft.

Remove connecting rod bearing shells (1 and 2).

Install new conrod bearing shells.

Installation:

Pay attention to guide lugs during installation.

IMPORTANT: All crankshaft crank pins are classified.

Fig. 118: Connecting Rod Bearing Shells

In each case insert only one color of connecting rod bearing shell (1 and 2) for each connecting rod.

Check conrod bearing clearance.

Piston in BDC position.

To determine the connecting rod bearing play, make sure that the bearing points are clean and free from oil and grease.

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

Fit conrod bearing cap so that pairing letters match up.

Fig. 119: Locating Conrod Bearing Clearance

IMPORTANT: Do not distort conrods or crankshaft.

Use the old conrod bolts to check conrod clearance.

Tighten down conrod bolts with special tool 00 9 120.

Tightening torque: 11 24 1AZ.

Fig. 120: Special Tool (00 9 120)

Unscrew conrod bearing cover. Read off conrod bearing play at width of flattened plastic thread on measurement scale.

Conrod bearing clearance.

• Remove Plastigage
• Coat crankshaft and connecting rod bearing shells with oil
• Install new conrod bolts and tighten down with special tool 00 9 120.

Tightening torque: 11 24 1AZ.

Fig. 121: Reading Conrod Bearing Play At Width Of Flattened Plastic Thread On Measurement Scale

Assemble engine.

READ NEXT: