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:
Pedals
Pedal Mounting Block
Removing And Installing (Replacing) Complete Bearing Support For
Foot Pedal
IMPORTANT: After completion of work, carry out function check.
Necessary preliminary work
Remove BRAKE SERVO
Release screws (1).
Remove control units from holder (2). Plugs remain connected.
Fig. 1:
Replacing Level Switch For Dynamic Drive Fluid Reservoir
Necessary preliminary work
Remove intake duct for air filter housing.
Release screws (1) and (2).
Remove washers.
Tightening torque 32 41 1AZ/2AZ
Remove fluid reservoir by pulling upwards.
Fig. 161: Identifying Washer Screws
NOTE: Raise and/or turn fluid reservoir in order to gain better acces
