BMW 7 Series: Removing Hydraulic Chain Tensioner For Timing Chains On Left Side (N63)
Notes
WARNING: Chain tensioner is pre-tensioned.
Release lock pin only in installed state.
Danger of injury!
IMPORTANT: Risk of damage! The engine must not be cranked when the chain tensioner is removed.
The timing chain may jump.
Necessary preliminary work
- Remove TIMING CASE COVER at top left
Crank engine back at central bolt (1) against direction of engine rotation by approx. 90º.
Fig. 268: Cranking Engine Back At Central Bolt Against Direction Of Engine
Rotation By Approx. 90º
IMPORTANT: The timing chain on the chain tensioner becomes the tight end on cranking back.
Do not crank engine without chain tensioner or special tool 11 9 900.
Piston (1) of chain tensioner must be pressed in against oil pressure in housing (see arrow).
Fig. 269: Identifying Piston Of Chain Tensioner Pressed In Against Oil
Pressure In Housing
If the chain tensioner piston is retracted over its full length, a 3.5 mm drill bit or a suitable lock pin must be positioned.
Fig. 270: Identifying Chain Tensioner Piston Retracted Over Its Full Length
Release screws (1).
Tightening torque 11 31 5AZ.
Remove chain tensioner (2).
Fig. 271: Identifying Chain Tensioner And Screws
IMPORTANT: Danger of injury! Chain tensioner is under high preload force.
Chain tensioner arrangement:
- Piston
- Expansion element
- Compression spring
- Housing
Fig. 272: Identifying Chain Tensioner Arrangement
Installation note:
Replace all gaskets and sealing rings
Assemble engine.
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Removing Hydraulic Chain Tensioner For Timing Chains On Right Side
(N63)
Notes
WARNING: Chain tensioner is pre-tensioned.
Release lock pin only in installed state.
Danger of injury!
IMPORTANT: Risk of damage!
The engine must not be cranked when the chain tensioner is rem
Replacing Both Timing Chains (N63)
Notes
WARNING: Burning hazard! Wear gloves.
Necessary preliminary work
Remove lower TIMING CASE COVER
To facilitate removal and installation of timing chains, turn engine
over with special tool 0
Rocker Arm With Bearing Mount
REMOVING AND INSTALLING/RENEWING ROCKER ARMS ON RIGHT SIDE (N63)
Necessary preliminary work
(cylinder bank 1 to 4)
Remove INLET AND EXHAUST ADJUSTMENT UNIT on right side.
Remove right INLET CAMSHAF
SEE MORE:
Circular Connector, 7-Pin, 8-Pin, System D2.5
Notes
Carefully pull off rubber grommet (1).
Carefully press back retaining lugs (2) of internal connector (3).
Fig. 52: Pressing Back Retaining Lugs Of Internal Connector
Slide internal connector (3) in direction of arrow until retaining lugs (2)
lock into locking groove (4).
Fig. 53: Sliding I
Intelligent Safety
Concept
Intelligent Safety enables central operation of the
driver assistance systems.
General information
Depending on how the vehicle is equipped, Intelligent
Safety consists of one or more systems
that can help prevent an imminent collision.
Front collision mitigation.
Evasion Assistant.
Inte
