2. Bringing the engine to TDC is an important part of procedures such as removing the drive chain/sprockets.
3. Before starting this procedure, make sure that the selector lever is in the Park position and that the parking brake is applied or chocks are placed under the rear wheels. Also disconnect the negative battery cable and remove the spark plugs (see chapter 1).
4. To set any piston to the TDC position, rotate the crankshaft using one of the following methods. The crankshaft should rotate clockwise when viewed from the front of the engine. The most preferred method is to turn the shaft using a socket head on an extension arm, placed over a bolt located at the front of the shaft. The bolt should be turned in a clockwise direction only.
5. To determine the position of the piston TDC on the compression stroke, it is necessary to connect the compression gauge to the first cylinder through the spark plug hole (see illustration 3.5). While turning the crankshaft as described in point 4, monitor the compression gauge readings. When the piston reaches the compression stroke, the pressure in the cylinder will begin to increase. At the same time, the TDC of the piston is its upper position in the cylinder. Remove the compression gauge.
6. To set the piston to TDC, insert a long screwdriver into the hole of the first spark plug so that it touches the piston.
Note: To prevent damage to the piston surfaces or cylinder wall, wrap the end of the screwdriver with adhesive tape.
While slowly turning the crankshaft, observe the movement of the piston in the cylinder using the position of the screwdriver. When the piston is raised, the screwdriver will be pushed out. TDC will be the piston position at which the screwdriver stops being pushed out of the cylinder.
Note: When turning the crankshaft, keep the screwdriver in a strictly vertical position to prevent it from bending when the piston moves up.
7. If the crankshaft was turned so that the piston was past TDC, turn the shaft counterclockwise so that the piston is approximately 25 mm below TDC, then turn the crankshaft again and set the piston to TDC
8. After the first piston has been set to TDC on the compression stroke, the pistons of the remaining cylinders can be brought to this position by performing the above-described operations and adhering to the order of ignition of the cylinders.