11 41 010 Removing and Installing/Replacing Chain Module For Oil Pump/Vacuum Pump
11 41 010 Removing and installing or replacing chain module for oil pump/vacuum pump (N55)Special tools required:
Important!
Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Necessary preliminary work:
^ Remove cylinder head cover
^ Remove all spark plugs.
^ Remove oil sump
^ Remove drive belt
^ Remove drive belt tensioning device
^ Remove vibration damper
^ Remove sealing cap for vacuum pump
^ Remove chain tensioner.
Screw in special tool 11 8 650 on belt tensioner screw connection on crankcase.
Turn sprocket with central bolt at crankshaft into position until special tool 11 0 290 can be secured.
Simultaneously secure special tool 11 0 290 to sprocket and special tool 11 8 650.
Release screw (1) for sprocket.
Tightening torque 11 66 2AZ.
Note:
Sprocket must be blocked in order to release central bolt (2).
Turn engine at central bolt until pin at oil pump housing and oil pump drive gear can be positioned.
Insert pin (1) with 6 mm dia. between sprocket and housing of oil pump.
Release oil pump central bolt (2).
Tightening torque 11 41 5AZ.
Remove fastener (1) in direction of arrow.
Position flywheel (1) with special tool 11 0 300 in TDC setting.
Press timing chain with chain tensioner (1) in direction of arrow.
Disconnect timing chain with special tool 11 4 120.
Feed out sprocket (3) at hexagon head (4) of vacuum pump.
Installation Note:
If the chain module is replaced, a mounting bar (2) is already pre-installed.
Release aluminum screws (1).
Remove oil pump drive gear from the drive shaft.
Open plug (1).
Tightening torque: 11 11 9AZ.
Installation Note:
Replace sealing ring.
Lock flywheel (1) with special tool 11 9 260.
Important!
Do not remove special tools 11 0 300 and 11 4 280 to release central bolt (1).
Release central bolt (1).
Installation Note:
Release central bolt (1) with 3/4 tool (2).
Breakaway torque approx. 500 Nm.
Screw in two screws (1) and remove hub (2) in direction of arrow.
Installation Note:
Replace front crankshaft seal.
Release aluminum screw (1) with special tool 11 8 640.
Remove chain module (1) in direction of arrow.
Installation Note:
Both grip discs must be attached to drive gear for oil pump with welding spots.
Grip discs are not individually available.
If grip discs are damaged, the drive gear for oil pump with grip discs must be replaced.
Installation Note:
Grip disc (1) must be mounted.
If grip disc (1) is not mounted, central bolt can come loose (engine damage).
Important!
Note installation direction of sprocket (2).
Collar (see arrow) on sprocket (2) points to engine.
Incorrect assembly will result in engine damage.
Insert chain module.
Secure aluminum screw (1) with special tool 11 8 640.
Tightening torque: 11 41 3AZ.
Insert aluminum screws (1) for chain module.
Tightening torque 11 41 6AZ.
Installation Note:
Replace aluminum screws.
Pay attention to mounting flats on oil pump drive.
Position module (1) for oil pump drive.
Position module (2) for camshaft drive.
Insert hub (3) for vibration absorber with grip disc.
Insert central bolt (1).
Secure central bolt with special tool 100 9 140.
Tightening torque 11 21 1AZ.
Installation Note:
Replace front crankshaft seal.
Assemble engine.
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