Flywheel: Service and Repair

Flywheel

Note! Some variation in the illustrations may occur, but the essential information is always correct.

Special tools:
999 5112 GEAR SECTOR 999 5112 Gear Sector
999 5678 Special screw 999 5678 Special Screw

Removal

Preparatory work

Remove:
- transaxle Refer to: Transmission, removing, B5254T2, M58, B5254T2, M56 Transmission, Removing
- clutch Refer to: Clutch disc and pressure plate Service and Repair

Removing the flywheel




Remove the engine speed (RPM) sensor with the bracket. Place it to one side.
Slacken off all the screws for the flywheel. Remove all the screws except for one.
Remove the gear sector 999 5112 GEAR SECTOR 999 5112 Gear Sector.
Detach the flywheel from the crankshaft. Remove the remaining screw.
Remove the flywheel.

Checking the crankshaft seal




Check the crankshaft seal for leakage.
To replace the crankshaft seal, refer to the car model and year.

Installation

Installing the flywheel





Note! Ensure that the mating surfaces on the crankshaft and flywheel are completely clean.

Use tool 999 5678 Special screw 999 5678 Special Screw , consisting of 3 studs with nuts.

Install:
- The 3 studs belonging to tool 999 5678 Special screw 999 5678 Special Screw distributed as illustrated
- the flywheel.

Note! Check that the locating pin on the crankshaft is positioned opposite the hole in the flywheel.

Note! Only applies to cars with dual mass flywheels: There is a marking in the form of a shallow hole (see the arrow). The marking indicates the direction to the guide hole on the flywheel.

Fit the gear sector 999 5112 GEAR SECTOR 999 5112 Gear Sector against the flywheel.
Tighten in the flywheel against the crankshaft, alternate between nuts when tightening. Use the 3 nuts that belong to tool 999 5678 Special screw 999 5678 Special Screw.

Caution! The flywheel must lie against the crankshaft flange before the screws are installed. There is a risk that excess locking fluid on the screws will come between the mating surfaces.

Install 7 new screws. Tighten crosswise with 45 Nm.
Remove the 3 nuts and studs.
Install the remaining 3 new screws for the flywheel and tighten with 45 Nm. Then angle-tighten all 10 screws crosswise 65°.
Install the impulse sensor with bracket. Tighten with 10 Nm.

Finishing

Install:
- clutch. Refer to: Clutch disc and pressure plate Service and Repair
- transmission. Refer to: Transmission, installation, B5254T2, M58, B5254T2, M56 Transmission, Installing