BMW X5: 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 magnesium crankcase requires aluminium screws/bolts exclusively.
Aluminium screws/bolts must be replaced each time they are released.
The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Necessary preliminary tasks:
- Remove Fan Cowl with electric fan
NOTE: Mark the direction of rotation of the drive belt if it is to be reused.
Layout of drive belt.
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Fig. 146: Drive Belt Tensioner, Mounting Screw And Removal Direction
Turn belt tensioner (4) in direction of arrow until bore (2) is flush on housing.
Hold belt tensioner (4) under tension.
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Fig. 147: Belt Tensioner And Bore
Secure belt tensioner with special tool 11 3 340.
NOTE: Illustration N42.
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Fig. 148: Special Tool (11 3 340) And Belt Tensioner
Remove drive belt (1) towards top.
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Fig. 149: Identifying Belt Tensioner
Assemble engine.
Installation:
Check that drive belt for is in correct installation position - risk of damage.
REPLACING ALTERNATOR DRIVE BELT (N52K)
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 magnesium crankcase requires aluminium screws/bolts exclusively.
Aluminium screws/bolts must be replaced each time they are released.
The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Necessary preliminary tasks:
- Remove Fan Cowl with electric fan
NOTE: Mark the direction of rotation of the drive belt if it is to be reused.
Course of E9x drive belt:
Turn belt tensioner (4) in direction of arrow until bore (2) is flush on housing.
Hold belt tensioner (4) under tension.
Load is removed from tensioning pulley.
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Fig. 150: Belt Tensioner And Bore
Course of E85 drive belt:
Turn belt tensioner (1) in direction of arrow until bore is flush on housing.
Hold belt tensioner (1) under tension.
Load is removed from tensioning pulley (2).
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Fig. 151: Belt Tensioner And Tensioning Pulley
All:
Secure belt tensioner (1) with special tool 11 3 340.
Remove drive belt upwards.
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Fig. 152: Special Tool (11 3 340) And Belt Tensioner
Assemble engine.
Installation:
Check that drive belt for is in correct installation position - risk of damage.
REPLACING TENSIONING DEVICE FOR 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 magnesium crankcase requires aluminium screws/bolts exclusively.
Aluminium screws/bolts must be replaced each time they are released.
The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Necessary preliminary tasks:
- Remove Drive Belt.
Remove special tool 11 3 340.
Release screw (3).
For tightening torque refer to 11 28 1AZ in 28 V-RIBBED BELT WITH TENSIONER.
Installation:
Replace aluminium screws.
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Fig. 153: Belt Tensioner And Belt Tensioner Screw
Assemble engine.
REPLACING TENSIONING DEVICE FOR ALTERNATOR DRIVE BELT (N52K)
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 magnesium crankcase requires aluminium screws/bolts exclusively.
Aluminium screws/bolts must be replaced each time they are released.
The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Necessary preliminary tasks:
- Remove Drive Belt
E9x only:
Remove special tool 11 3 340.
Release screw (3) on belt tensioner (4).
For tightening torque refer to 11 28 1AZ in 28 V-RIBBED BELT WITH TENSIONER.
Installation:
Replace aluminium screws.
Remove belt tensioner (4).
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Fig. 154: Belt Tensioner And Belt Tensioner Screw
E85 only:
Remove special tool 11 3 340.
Release screw on belt tensioner (1).
For tightening torque refer to 11 28 1AZ in 28 V-RIBBED BELT WITH TENSIONER.
Installation:
Replace aluminium screws.
Remove belt tensioner (1).
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Fig. 155: Belt Tensioner And Drive Belt
Assemble engine.
READ NEXT:
Checking Timing Of Camshaft(s) (N52K)
Special tools required:
11 0 300
11 4 281
11 4 282
11 4 283
Necessary preliminary tasks:
Remove cylinder head cover
Remove underbody protection
Remove fastener (1) in direction of arrow.
Ins
Removing And Installing/Replacing Inlet Camshaft (N52K)
Special tools required:
11 4 281
11 4 481
IMPORTANT: Aluminium screws/bolts must be replaced each time they
are released.
The end faces of aluminium screws/bolts are painted blue for the purpose
SEE MORE:
Removing And Installing/Replacing Left Or Right Head Airbag
WARNING: Read and comply with safety regulations for handling airbag
modules and
pyrotechnical belt tensioners.
Incorrect handling can activate airbag and cause injury.
A damaged head airbag must be replaced.
A damaged head airbag exhibits an impaired protective function and in
extreme cases los
Securing Engine In Installation Position (N62)
Special tools required:
00 0 200
00 0 202
00 0 204
00 0 208
00 0 451
00 0 452
11 0 000
WARNING: Danger of injury!
Owing to the new guidelines on pedestrian protection, side panels are no
longer suitable for supporting the engine.
Observe following instructions relating to special tool:
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