BMW 7 Series: 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 removed.
The timing chain may jump.
Necessary preliminary work
- Remove TIMING CASE COVER at top right
Crank engine back at central bolt (1) against direction of engine rotation by approx. 180º.
Fig. 273: Cranking Engine Back At Central Bolt Against Direction Of Engine
Rotation By Approx. 180º
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. 274: 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. 275: Identifying Chain Tensioner Piston Retracted Over Its Full Length
Release screws (1).
Tightening torque 11 31 5AZ.
Remove chain tensioner (2).
Fig. 276: 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. 277: Identifying Chain Tensioner Arrangement
Installation note:
Replace all gaskets and sealing rings
Assemble engine.
READ NEXT:
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
Valves With Springs
REMOVING AND INSTALLING/REPLACING ALL VALVES (N63)
Necessary preliminary work
Remove LEFT CYLINDER HEAD.
Remove RIGHT CYLINDER HEAD.
Remove camshafts.
Mount cylinder head (1) on special tool 11
SEE MORE:
System Overview
Lane Departure Warning and High-beam Assistant
The overview below illustrates the components used in combining these
systems.
Fig. 100: System Overview Of KAFAS Components
KAFAS COMPONENTS LEGENDS
Lane departure warning/High-beam assistant forward-pointing video camera
KAFAS control unit
(Equi
Removing And Installing/Replacing Left Or Right Antiroll Bar
Link/Integral Link
NOTE: If the integral link is detached from the swinging arm, it is
necessary after
installation to carry out a chassis/wheel alignment check.
Necessary preliminary work
Remove REAR WHEEL.
Release nut (1) and remove screw.
Tightening torque 33 32 4AZ.
Release screw (2) and remove integral link
