Front Crankshaft Seal: Service and Repair

CRANKSHAFT OIL SEAL

REMOVAL AND INSTALLATION

Crankshaft Front Oil Seal Removal Steps 1-8 / Crankshaft Rear Oil Seal Removal Steps (CVT) 4-7:

Required Special Tools:
^ MB991883: Flywheel Stopper
^ MD998718: Crankshaft Rear Oil Seal Installer
^ MB991448: Bush Remover And Installer Base

REMOVAL SERVICE POINT

[[A]] FLYWHEEL BOLTS/DRIVE PLATE BOLTS REMOVAL





Fix the flywheel or drive plate using special tool MB991883, and loosen the flywheel bolts or drive plate bolts.

INSTALLATION SERVICE POINTS

]]A[[ CRANKSHAFT REAR OIL SEAL INSTALLATION
1. Apply a small amount of engine oil to the entire inner diameter of the oil seal lip.





2. Using special tool MD998718, press in the crankshaft rear oil seal up to the cylinder block assembly end surface.

]]B[[ DRIVE PLATE/DRIVE PLATE ADAPTER PLATE/DRIVE PLATE BOLT INSTALLATION
1. Remove the engine oil and deposit from the bolt threads of the drive plate, screw holes of crankshaft, and drive plate.
2. Apply a small amount of engine oil to the drive plate and the bearing surface of drive plate adapter plate.





3. Fix the flywheel or drive plate using special tool MB991883 in the same manner as removal.
4. Apply a small amount of engine oil to the bolt threads of drive plate or the screw holes of crankshaft.
5. Tighten drive plate bolts to temporarily torque 40 N-m (30 ft lb).
6. Tighten the drive plate bolts to the specified torque.

Tightening torque: 130 Nm (96 ft-lb)

]]C[[ FLYWHEEL/FLYWHEEL BOLTS INSTALLATION
1. Remove the sealant, the engine oil, and other adhering materials from the flywheel assembly installation face, the crankshaft screw hole, and flywheel bolts.
2. Install the flywheel assembly to the crankshaft.





3. Use special tool MB991883 to secure the flywheel assembly in the same manner as removal.





4. Apply the engine oil to the installation face of the flywheel bolts for the flywheel assembly.
5. Apply specified sealant to the flywheel bolt threads.

Specified sealant: Three bond 1324 or equivalent





6. Tighten flywheel bolts to temporary torque 40 Nm (30 ft-lb) in the order shown in the illustration.
7. Tighten flywheel bolts to temporary torque in the order shown in the illustration.

Tightening torque: 130 Nm (96 ft-lb)

]]D[[ CRANKSHAFT FRONT OIL SEAL INSTALLATION
1. Apply a small amount of engine oil to the entire inner diameter of the oil seal lip.

CAUTION
When installing the crankshaft oil seal, be careful to avoid damage to the crankshaft front oil seal.





2. Using special tool MB991448, press in the crankshaft front oil seal up to the chamfered surface of timing chain case.