Crankshaft Seal Retainer: Service and Repair

Sealing Flange, Transmission Side

Special tools, testers and auxiliary items required

• Hand Drill with Plastic Brush Attachment

• Protective Eyewear

• Silicone Adhesive Sealant (D 176 501 A1)

Removing

- Remove the transmission.

- Remove the flywheel. Refer to => [ Flywheel ] Service and Repair.

- Remove the oil pan. Refer to => [ Oil Pan ] Oil Pan.

- Remove the sealing flange to cover bolts - 1 and 2 -.






The cylinder head gasket could be damaged. The cylinder head gasket can kink if it is bent too much. A kinked cylinder head gasket must be replaced.

- Remove the sealing flange from the cylinder block horizontally.

- Press the crankshaft shaft seal out of the sealing flange.

Installing

Risk of contaminating the lubrication system with sealant residue. Cover any open parts on the engine to keep sealant from falling in.

- Using a rotating plastic brush, remove any remaining sealant from the sealing flange and cylinder block. Wear protective eyewear.






- Clean the sealing surfaces, must be free of oil and grease.

- Clean the holes - arrow - in the cylinder head gasket of the old sealant.






• The holes in the cylinder head gasket are only partially visible when the cylinder head is installed.

The cylinder head gasket could be damaged. The cylinder head gasket can kink if it is bent too much. A kinked cylinder head gasket must be replaced.

- Bend the end of the cylinder head gasket down slightly - arrows - until the upper sealing surface on the cylinder head gasket and cylinder head can be cleaned.






- Clean the top and bottom of the cylinder head gasket, it must be free of oil and grease.

- Cut the sealant tube nozzle at the front mark (nozzle diameter: approximately 2 mm).






- Lightly coat the top and bottom of the cylinder head gasket sealing surfaces with sealant by bending the gasket down slightly again - arrows -.






- To coat surface between cylinder head and gasket, use a flat object, for example, a feeler gauge.

- Place a thin sealant bead - arrows - from below in both corners between the cylinder head gasket and cylinder block so that cylinder head gasket holes are filled.






- Make sure the sealing flange alignment bushings are installed in the cylinder block.

- Apply the silicone adhesive sealant (D 176 501 A1) as illustrated and then install the sealing flange.






• Install the sealing flange within 5 minutes after applying the sealant.

- Tighten the bolts in 3 steps as follows:






A Tighten the bolts - 1 - to 5 Nm.
B Tighten the bolts - 2 - to 23 Nm.
C Tighten the bolts - 1 - to 10 Nm.

- Install the crankshaft seal. Refer to => [ Crankshaft Seal, Transmission Side ] Service and Repair.

- Install the oil pan. Refer to => [ Oil Pan ] Oil Pan.

- Install the flywheel. Refer to => [ Flywheel ] Service and Repair.

- Install the transmission.