Removing hydraulic chain tensioner for timing chains on right side (S63T2) (X5 M)
Special tools required:
- 11 4 120
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.
The engine must not be cranked when the chain tensioner is removed.
The timing chain may jump.
Necessary preliminary tasks:
- Remove TIMING CASE COVER at top right
IMPORTANT:
The timing chain on the chain tensioner becomes the tight end on cranking back. Do not turn engine without chain tensioner.
Retract the entire length of the piston (2) of the chain tensioner (1).
Tightening torque: 11 31 5AZ .
The piston of the chain tensioner must be pressed in against oil pressure in housing (see arrow).
Secure piston with special tool 11 4 120.
Unfasten screws (2 and 3).
Tightening torque 11 31 5AZ .
Remove chain tensioner (1).
IMPORTANT:
Danger of injury!
Chain tensioner is under high preload force.
Chain tensioner is under high preload force.
Chain tensioner arrangement:
- Pistons
- Expansion element
- Compression spring
- Housing
Installation note:
Replace all gaskets and sealing rings .
Assemble engine.