Front crankshaft oil seal
Removal
1. Remove the timing belt.
Fig. 5.10. Crankshaft oil seals: 1 – crankshaft pulley; 2 – key; 3 – front crankshaft oil seal; 4 – rear crankshaft oil seal; 5 – flywheel assembly; 6 – bolt, 53 Nm
2. Remove crankshaft pulley 1 and key 2 (Fig. 5.10).
3. Drill two small holes in the front crankshaft oil seal, located at diametrically opposite ends of the oil seal. Screw two self-tapping screws into the drilled holes in the oil seal and use pliers to pull out oil seal 3 by the screw heads.
4. Clean the oil seal seat.
Installation
Installation is carried out in the reverse order of removal, taking into account the following.
1. Lubricate the entire working edge of the oil seal with a small amount of engine oil.
2. Install the special tool MB996040 (guide) onto the crankshaft nose.
3. Install the seal on the guide.
4. Using special tool MB996040, install the oil seal into place.
5. Remove all traces of engine oil and install the crankshaft pulley.
Rear crankshaft oil seal
Removal
1. Remove the gearbox assembly.
2. Remove the clutch housing and clutch driven disc.
3. Secure the flywheel or torque converter drive plate from turning by installing special tool MB996015 on the flywheel ring gear, unscrew the bolts and remove the flywheel.
4. Drill two small holes in the rear crankshaft oil seal, located at diametrically opposite ends of the oil seal. Screw two self-tapping screws into the drilled holes in the oil seal and use pliers to pull the oil seal out by the screw heads.
5. Clean the oil seal seat.
Installation
Installation is carried out in the reverse order of removal, taking into account the following.
1. Lubricate the entire working edge of the oil seal with a small amount of engine oil.
2. Install the special tool (guide) on the crankshaft end.
3. Install the seal on the guide.
4. Before installation, clean the mounting bolts and threaded holes in the crankshaft and flywheel from oil, sealant and other contaminants.
5. Apply 3M STUD Locking 4170 or similar sealant to the threads of the mounting bolt holes.
6. Using the same special tool as for removal, secure the flywheel or torque converter drive plate and tighten the mounting bolts to 53 N·m (33 ft·lbs ft) of torque.