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.
Modified procedure: The colors of the connecting rod bearing shells are the same at the top and bottom.
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
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Fig. 116: Connecting Rod Classifications
Cylinder Classification Red / Red
- Cylinder Classification Blue / Blue
- Cylinder Classification Blue / Blue
- Cylinder Classification Red / Red
- Cylinder Classification Red / Red
- Cylinder Classification Blue / Blue
Release conrod bolts (1).
Remove connecting rod bearing cap (2).
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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.
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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.
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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.
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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.
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Fig. 121: Reading Conrod Bearing Play At Width Of Flattened Plastic Thread On
Measurement Scale
Assemble engine.
READ NEXT:
Piston With Rings And Pin
REMOVING AND INSTALLING/REPLACING ALL PISTONS (N52K)
Special tools required:
00 9 120 TORQUE ANGLE MEASURING DIAL
11 4 491
11 4 492
11 4 493
11 4 494
11 6 241
11 6 261
11 8 330
WARNING: Dang
V-Ribbed Belt With Tensioner / Deflect Element
REPLACING ALTERNATOR DRIVE BELT (N51)
Special tools required:
11 3 340
IMPORTANT: Aluminium-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical
corrosion.
A
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If a normal or quick charger is used to charge the battery, the battery must
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IMPORTANT: In order to prevent
