Note.
- The crankshaft is at TDC of the piston of the 1st cylinder for ignition of the mixture only if the camshafts are at TDC of the piston of the 1st cylinder (the devices must be locked).
- The lock bolt "T10121" serves simultaneously as a counter support for loosening and tightening the crankshaft screws.
- The T10123 locking device must not be used as a counter support for loosening and tightening camshaft screws.
- To make it easier to turn the crankshaft, unscrew the spark plugs.
1. Remove the plugs on the cylinder head cover (arrows) as shown in the figure below.
2. Remove the engine speed sensor "G28", located on the rear of the cylinder block.
3. Turn the crankshaft in the direction of engine rotation until the splines in both camshafts are in a horizontal position.

4. Make sure that the T10123 locking devices can be easily installed into the camshafts.
5. Secure both fixtures with the mounting screws (M6) as shown in the figure below.

6. Lock the crankshaft, insert the lock bolt "T10121" into the flywheel hole, as shown in the figure below.
Note: If the T10121 locking bolt cannot be inserted, the T10123 locking devices must be removed from the camshafts by turning the crankshaft in the direction of engine rotation one full revolution (360°), then repeating the above operations.

7. If it is not possible to install both locking devices, then it is necessary to adjust the valve timing.
8. If both locking devices can be installed, remove the locking devices from the holes, install the plugs and the engine shaft speed sensor.
9. Further installation is carried out in the reverse order of removal.
[Data taken from this portal www.skodabook.ru]
