Replacing the rear crankshaft oil seal, removing and installing the flywheel and lower timing chain cover (Skoda Superb B6)

1. The installation details of the crankshaft oil seals are shown in Illustration 7.1. The installation details of the timing chain covers and rear oil seal are shown in the accompanying illustration.

Flywheel

2. Remove the DSG (see Chapter 7).

3. Screw the T10044 counter support with spacer washers into the cylinder block (arrow on the accompanying illustration) approximately 5 mm thick. Set the counter support to position (A) to loosen the flywheel fastener. Mark the position of the flywheel relative to the crankshaft.





4. Turn the secondary side (And on the accompanying illustration) 2-mass flywheel so that the bolts (B) are in the center of the holes (arrows). If, when unscrewing/tightening the bolt, its head rests against the secondary side of the flywheel, it will be damaged.



5. Unscrew the flywheel mounting bolts and remove it.

6. Installation is performed in the reverse order. Align the flywheel according to the marks made during removal. Use new bolts. Tighten the bolts in a crosswise order first by hand, then with a force of 60 Nm, and finally tighten them to an angle of 90°.

Rear oil seal

7. Remove the flywheel (see subsection above).



8. Position the T20143/2 puller behind the sealing lip of the oil seal, as shown in the accompanying illustration, rest the puller on the flange in the direction of the arrow and pull out the oil seal.



9. Slide the oil seal (And on the accompanying illustration) its outer side through the T10122/1 sleeve of the T10122 device onto the T10122/2 mounting sleeve. Remove the T10122/1 sleeve and slide the T10122/2 sleeve with the dry seal onto the crankshaft journal.



10. Drive the rear oil seal with the T10122/2 bushing into the rear flange using the T10122/3 plate until it stops (see accompanying illustration).



11. Install the flywheel.

Lower Timing Chain Cover/Rear Sealing Flange

12. Remove the flywheel (see subsection above).

13. Remove the engine oil pan (see section 13).

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14. Remove the bolts (1 and 2 in the accompanying illustration) fastenings of the sealing flange and remove it from the cylinder block strictly horizontally so as not to damage the cylinder head gasket. Remove the rear oil seal from the flange.

Caution: If the cylinder head gasket is too bent, it will need to be replaced (see section 9).

15. Plug the engine openings to prevent any sealant residue from getting into them and remove any sealant residue from the mating surfaces with a suitable chemical. Remove any old sealant that has squeezed out onto the cylinder head gasket and into its openings (see accompanying illustration).

Note: When the cylinder head is installed, only half of the gasket holes are visible.

16. Bend the edge of the cylinder head gasket downwards slightly (see accompanying illustration) and clean its upper surface and the lower surface of the cylinder head. All surfaces must be degreased. Apply a thin layer of D176 501A1 sealant to the upper and lower surfaces of the cylinder head gasket. For example, a feeler gauge can be used to apply grease between the cylinder head and its gasket.





17. Apply thin beads of sealant to both joints of the cylinder head gasket to the cylinder block so that the holes in the gasket are filled (see accompanying illustration). Make sure the sealing flange centering bushings are in the cylinder block.



18. Apply a bead of D176 501A1 sealant to the rear sealing flange as shown in the accompanying illustration and install the flange within 5 minutes after applying the sealant.



19. Tighten the rear flange mounting bolts in three stages. First tighten the bolts (1 in illustration 8.14) with a torque of 5 Nm, then tighten the bolts (2) with a torque of 23 Nm, and finally tighten the bolts (1) with a torque of 10 Nm.



20. Install the rear oil seal (see subsection above).

21. Install the engine oil pan and flywheel.