Oil Pump: Service and Repair
11 41 000 Removing and installing/replacing oil pump (N63)Special tools required:
Important!
All adjusting procedures on the chain drive must be observed.
A timing chain which is tensioned too tautly can cause noises in the chain drive.
A timing chain that is too slack can cause the timing chain to jump.
Risk of damage in oil pump drive.
Necessary preliminary work:
^ Drain engine oil.
^ Remove upper oil sump section.
Unscrew nuts (2).
Tightening torque: 11 41 1 AZ.
Remove intake pipe (1).
Installation note:
Replace O-ring.
Release all nuts (1) using special tool 11 7 201.
Tightening torque 11 41 5 AZ.
Remove oil pump drive gear.
Note:
Picture shows engine removed.
Unscrew nuts (1).
Release screws, remove oil pump (1) with aid of a second person.
Installation note:
Replace screws.
Tightening torque 11 41 2AZ.
Detach oil lines (1) upwards in direction of arrow.
Installation note:
Replace sealing rings (1).
Apply light coat of oil to sealing ring (1).
Coat sealing ring (2) with suitable lubricant.
Installation note:
Replace O-ring (1) for oil feed line.
Fit oil lines (1) in direction of arrow.
Installation note:
If the oil pump is renewed, the oil deflector must be converted.
Release screws (1).
Tightening torque: 11 41 6 AZ.
Modify oil deflector (2).
Fit special tool 11 8 920 on special tool 11 9 280.
Important!
Left-hand thread on oil pump screw connection.
Do not grip oil pump drive with a pair of pliers risk of damage.
Important!
Nut (1) has left-hand thread.
Position special tool 11 8 920 on sprocket.
Slacken nut (1).
Installation note:
Check mounting flats on pump shaft (1) for damage.
Important!
Nut (1) has left-hand thread.
Grip pump with assistance of a second person.
Secure nut (1) with special tool 00 9 120.
Tightening torque: 11 41 4
Join and secure nuts (1).
Tightening torque 11 41 2 AZ.
Install oil pump drive gear.
Secure all nuts (1) with special tool 11 7 201.
Tightening torque 11 41 5 AZ.
Adjust oil pump timing chain.
Pretension oil pump adjusting sleeve (1) with a hexagon socket wrench.
Adjustment value 10 mm +2.
Minimally preload timing chain (1) with special tool 51 0 342.
Read off measured value A on special tool 51 0 342 and note down.
Important!
Do not use force to preload timing chain (1).
Using a screwdriver (1), preload timing chain to minimal extent in direction of arrow.
Read off measured value B on special tool 51 0 342 and note down.
Important!
Do not use force preload timing chain.
Measured value A minus measured value B results in the adjustment value.
Adjustment value 10 mm +2.
Join and secure screw (2).
Tightening torque 11 41 2 AZ.
Assemble engine.
