2. Bringing the engine to TDC is an important part of procedures such as removing the drive chain/sprockets.
3. Before starting this procedure, you must make sure that the selector lever is set to the Park position, and that the parking brake is engaged or that the rear wheels are chocked. Also disconnect the negative battery cable and remove the spark plugs (see chapter 1).
4. To install any piston to the TDC position, rotate the crankshaft using one of the following methods. The crankshaft should be rotated clockwise when viewed from the front of the engine. The preferred method is to rotate the shaft using a socket on an extension arm over a bolt located at the front of the shaft. The bolt should only be turned in a clockwise direction.
5. To determine the position of the piston TDC on the compression stroke, it is necessary to connect a compression gauge to the first cylinder through the spark plug hole (see illustration 3.5). When turning the crankshaft as described in paragraph 4, monitor the readings of the compression gauge. When the piston reaches the compression stroke, the pressure in the cylinder will begin to increase. The compression TDC of the piston is also its top position in the cylinder. Remove the compression gauge.
6. To install the piston at TDC, it is necessary to insert a long screwdriver into the hole of the first spark plug so that it comes into contact with the piston.
Note: To prevent damage to the piston surfaces or cylinder wall, wrap the end of the screwdriver with duct tape.
Slowly turning the crankshaft, observe the position of the screwdriver for the movement of the piston in the cylinder. When the pistons are lifted, the screwdriver will be pushed out. TDC will be the piston position at which the screwdriver stops pushing out of the cylinder.
Note: When turning the crankshaft, keep the screwdriver strictly vertical to prevent it from bending as the piston moves upward.
7. If the crankshaft was turned so that the piston was behind TDC, turn the shaft counterclockwise until the piston was approximately 25 mm below TDC, then turn the crankshaft again and set the piston to TDC
8. After installing the first piston at TDC on the compression stroke, you can bring the pistons of the remaining cylinders to this position by performing the operations described above and adhering to the order of ignition of the cylinders.