Crankshaft seals

Removing

• Disconnect the wire from the negative battery terminal.

Front crankshaft oil seal

• Remove the timing belt drive timing.
• Unscrew the bolt and remove the crankshaft pulley and segment key (pic. 4.18).

Pic. 4.18. Crankshaft seals: 1 - crankshaft pulley; 2 - segment key; 3 - front crankshaft oil seal; 4 - flywheel; 5 - rear crankshaft oil seal; 6 - bolt, 53 Nm

• Drill two small holes in the front crankshaft oil seal located at diametrically opposite ends of the oil seal. Insert two self-tapping screws into the drilled holes in the stuffing box and, using pliers by the screw heads, pull out the stuffing box.
• Clean the gland seat.

Rear crankshaft oil seal

• Remove the gearbox.
• Turn out bolts and remove a casing of coupling with a pressure disk and a conducted disk of coupling.
• Using a special tool, block the flywheel from turning and unscrew the bolts of its fastening (pic. 4.19)

Pic. 4.19. Removing the flywheel mounting bolts and using a special tool to block the flywheel from turning

• Remove flywheel.
• Punch a groove near the sealing lip with a knife or flathead screwdriver.

Warning. Be careful not to damage the crankshaft and cylinder block.

• Insert a flat screwdriver blade wrapped in cloth into the punched groove, and with a screwdriver as a lever, remove the oil seal.

Installation

Rear crankshaft oil seal

• Lubricate the lip of the new oil seal with a thin layer of engine oil.
• Install the special guide tool MB996038 on the end of the crankshaft.
• Install the oil seal on the special guide tool.
• Install the crankshaft rear oil seal with the special tool (pic. 4.20).

Pic. 4.20. Using a special tool to install the crankshaft rear oil seal

• Clean the threaded holes in the crankshaft from the remnants of the blocking agent.
• Apply a coat of blocking agent to the threaded holes in the crankshaft and to the threads of the flywheel mounting bolts.

• Using a special tool, block the flywheel from turning and screw in the bolts of its fastening (pic. 4.19).

• Establish a conducted disk of coupling, a casing of coupling with a pressure disk and screw bolts of its fastening.
• Install the gearbox.

Front crankshaft oil seal

• Lubricate the lip of the new oil seal with a thin layer of engine oil.
• Install the special guide tool MB996040 on the front end of the crankshaft.
• Install the oil seal on the special guide tool.
• Install the front crankshaft oil seal with the special tool (pic. 4.21).

Pic. 4.21 Using a special tool to install the crankshaft front oil seal

• Install the crankshaft pulley.
• Install the timing belt drive of the gas distribution mechanism.
• Connect the wire to the negative battery terminal.