BMW X5: Replacing Crankshaft Pulse Generator (N52, N52K, N51, N53)
IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).
IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they arereleased.
The end faces of aluminum 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:
- Read out fault memory of DME control unit
- Switch off ignition
NOTE: Installation location of pulse generator for crankshaft is underneath starter motor.
Preparatory tasks:
- Remove intake air manifold.
Detach plug (1) from crankshaft pulse generator (2).
Release screw.
Installation
Replace aluminum screws.
Tightening torque 12 14 2AZ.
Withdraw pulse generator (2) from crankcase.
Installation:
Replace sealing ring.
NOTE: Check stored fault messages. Now clear the fault memory.
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Fig. 13: Locating Pulse Generator Plug
REPLACING INLET CAMSHAFT PULSE GENERATOR (N52, N52K, N51, N53)
IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).
Necessary preliminary tasks:
- Read out fault memory of DME control unit.
- Switch off ignition
- Remove If necessary, remove radiator cover
Unlock plug (1) and remove.
Release bolt..
Installation:
Replace screw.
Tightening torque 12 14 3AZ. Remove pulse generator (2).
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Fig. 14: Locating Pulse Generator Plug
NOTE: Check stored fault messages.
Now clear the fault memory.
REPLACING PULSE GENERATOR ON INLET CAMSHAFT (N52K)
IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection).
Necessary preliminary tasks:
- Read out fault memory of DME control unit; if necessary, work through test schedules
- Switch off ignition
Lever out expansion rivets (1).
Press lock (2) and raise intake duct (3).
Detach intake duct (3) from air filter housing and remove.
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Fig. 15: Locating Ignition Coil Covers Screws And Holder
Unclip Bowden cable for engine bonnet/hood actuator from transverse reinforcement (1).
Release screws on left and right sides. Tightening torque 51 71 4AZ.
Remove cross-brace (1).
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Fig. 16: Identifying Plug Connector
Installation:
Replace screw.
Tightening torque 12 14 3AZ.
Remove pulse generator (2).
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Fig. 17: Locating Pulse Generator And Screw
NOTE: Check stored fault messages.
Now clear the fault memory.
READ NEXT:
Replacing Exhaust Camshaft Pulse Generator (N52, N52K, N51, N53)
IMPORTANT: Read and comply with notes on protection against
electrostatic damage (ESD
protection).
Necessary preliminary tasks:
Read out fault memory of DME control unit; if necessary, work through
Removing/Replacing Knock Sensors (N52, N52K, N51)
IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical
corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum
Alternator With Drive
REPLACING ALTERNATOR BELT PULLEY
Special tools required:
12 7 110.
Remove and install alternator drive belt.
Depending on alternator type, grip shaft with:
hexagon socket
multi-tooth socket or
SEE MORE:
PostCrash - iBrake
Principle
In the event of an accident, PostCrash can bring
the vehicle to a halt automatically without intervention
by the driver in certain situations.
General information
PostCrash can reduce the risk of another collision
and subsequent consequences.
At standstill
After coming to a halt, the brake
Performance Controls
Cooling System
The cooling system of the N54 engine consists of a radiator circuit and an
isolated oil cooling circuit. The fact
that there is an isolated oil-cooling circuit ensures that heat is not
introduced via the engine oil into the engine's
coolant system.
Fig. 71: Identifying Cooling S
