Replacement of a forward sealing ring of a cranked shaft

1. Remove ground wire from battery.

2. Loosen the lower mounting bolts, unscrew the upper alternator tension bolt, tilt the alternator towards the engine and remove the drive belt.

3. Unscrew the 4 bolts securing the toothed belt cover and remove it.

4. On engine models made from 2/82, the timing belt cover consists of two parts, each with its own rubber gasket. On the bottom cover there is a mark for setting the first cylinder to TDC. The bottom cover can only be removed after removing the pulley from the crankshaft.

5. Turn the engine crankshaft until the marks on the camshaft pulley and cylinder head, as well as on the crankshaft pulley and oil pump housing, are aligned.

6. Fix the engine crankshaft by removing the starter and fixing the flywheel ring gear.

7. Unscrew the mounting bolt and remove the V-belt pulley from the crankshaft.

8. Loosen the bolts securing the toothed belt tension roller and use a screwdriver to remove the tension roller from the belt, compressing the spring, and tighten the bolts.

9. To reinstall the toothed belt, note the direction of its movement.

10. Remove toothed belt.

Attention! After removing the belt, it is strictly forbidden to turn the crankshaft and camshaft pulleys, as pistons may collide with open valves, which will lead to serious engine damage.

11. Remove the toothed pulley from the crankshaft, as well as the thrust bulge washer.

12. Using the appropriate tool, remove the crankshaft front O-ring.

13. Lubricate the lips of the new sealing ring and install it in place with the adapter sleeve and the pulley bolt.


14. Install the thrust washer with the convex side against the O-ring and toothed pulley.

15. Install and adjust the tension of the toothed belt, while checking the alignment of the alignment marks.

16. Further installation is carried out in the reverse order of removal.