11 41 010 Removing and Installing/Replacing Chain Module For Oil Pump/Vacuum Pump
11 41 010 Removing and installing/replacing chain module for oil pump/vacuum pump (N54, N54T)Special tools required:
Important!
Aluminium screws/bolts must be replaced each time they are released.
Aluminium screws/bolts are permitted with and without colour coding (blue).
For reliable identification:
Aluminium screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Necessary preliminary tasks:
^ Remove cylinder head cover
^ Remove oil sump
^ Remove drive belt
^ Remove drive belt tensioner
^ Remove vibration damper
^ Remove vacuum pump sealing cap
^ Remove chain tensioner.
Turn sprocket (3) at central bolt (crankshaft) into position.
Screw special tool 11 8 650 into crankcase.
Position special tool 11 0 290 on sprocket and on special tool 11 8 650.
Release screw (1).
Tightening torque 11 66 2AZ.
Press timing chain with chain tensioner (1) in direction of arrow.
Secure chain module with special tool 11 4 120 in hole (2).
Feed out sprocket (3) at hexagon head (4) of vacuum pump.
Installation note:
A lock pin is pre-installed if the triangular drive is replaced.
Unfasten screws (2).
Tightening torque 11 41 3AZ.
Note:
Sprocket must be blocked in order to release central bolt (2).
Insert pin (1) with 6 mm dia. between sprocket and housing of oil pump.
Release oil pump central bolt (2).
Tightening torque 11 11 5AZ.
Secure crankshaft and camshaft.
Do not remove special tools 11 0 300 and 11 4 280.
Fit special tool 11 9 280.
Release central screw (1).
Note:
A 3/4 inch tool is needed to release the central bolt.
A second person is required.
Remove hub (2) towards front.
Installation note:
Replace front crankshaft seal.
Open screw plug on bedplate.
Installation note:
Replace seal.
Release screw (1) with special tool 11 8 640 on triangular drive.
Tightening torque 11 41 3AZ.
Installation note:
Replace aluminium screws.
Remove triangular drive (1) in direction of arrow.
Important!
Note installation direction of sprocket (2).
Collar on sprocket (2) points to timing chain drive.
Incorrect assembly will result in engine damage.
Important!
The N54 engine requires special friction plates between the friction surfaces.
The engine will incur damage if the friction plates are damaged or are not fitted.
Friction plates (1 and 2) must be clipped into place on the oil pump module sprocket.
The third friction plate is attached to the crankshaft hub.
Feed in oil pump chain module.
Secure oil pump chain module with screws (2).
Tightening torque 11 41 3AZ.
Secure screw (1) with special tool 11 8 640.
Tightening torque 11 41 3AZ.
Installation note:
Check both friction plates (3) with retainers for correct installation position.
Push on friction plate (1) without retainers.
Important!
The N54 engine requires special friction plates between the friction surfaces.
The engine will incur damage if the friction plates are damaged or are not fitted.
Fit central bolt (1).
Insert special tools 11 8 650 and 11 0 290.
Tighten bolt (1).
Tightening torque 11 66 2AZ.
Install special tool 11 0 300.
Tighten bolt (2).
Tightening torque 11 41 4AZ.
Tighten down special tool 11 5 200 with screws (1) to hub.
Do not remove special tools 11 0 300 and 11 4 280.
Tighten central bolt to jointing torque.
Tightening torque 11 21 1AZ.
Mark torsion angle tightening on tool with stroke of paint (1).
See graphic.
Important!
Do not remove tool from central bolt during torsion angle tightening. Risk of damage!
Installation note:
Replace front crankshaft seal.
Assemble engine.
4It:
