Using a 4mm drill to check that the camshaft is installed correctly
The top dead center of a piston is the point through which each piston passes as the crankshaft rotates. Each piston reaches the TDC position at the end of the compression stroke, then again at the end of the exhaust stroke. The TDC of the piston of the first cylinder is used to set the engine timing mechanism.
Location of timing marks on the engine when installing the piston of the first cylinder at top dead center
A – placement of curved rods (1) in mounting holes;
B – the mark on the crankshaft pulley is aligned with the side edge of the bracket, crankshaft angle sensor
Removal the crankcase ventilation hose from the cylinder head cover on models with the CIS fuel injection system
1. Mark the position of the high-voltage wire terminal of the first cylinder on the distributor cap.
2. Remove the cylinder head cover.
3. Using the crankshaft pulley mounting bolt, turn the engine crankshaft clockwise until the following marks are aligned with the pointers (see fig. Location of engine timing marks when installing the piston of the first cylinder at top dead center, Removing the crankcase ventilation hose from the cylinder head cover on models with the CIS fuel injection system):
a – the mark on the camshaft pulley should align with the side edge of the bracket for the crankshaft angle sensor;
b – the mounting holes in the front flanges of the camshafts must be located outside and at the level of the upper plane of the cylinder head;
c – the ignition distributor rotor must be aligned with the high-voltage wire terminal of the first cylinder.
4. After all marks are aligned, the piston of the first cylinder is at the top dead center in the compression stroke.