To do the job, you will need a wrench to tension the timing belt.
Execution sequence
1. We prepare the car for work (see "Preparing the car for maintenance and repair).
2. Key by 10 mm unscrew the three bolts securing the front cover of the timing belt.
3. Raise the cover vertically upwards, and then remove it from the engine.
4. Rotating the crankshaft, external inspection check the condition of the belt.
Note: The crankshaft can be rotated with a 17mm spanner (on car parts by 19 mm) for the bolt securing its pulley or with a large slotted screwdriver for the teeth of the flywheel. To do this, remove the rubber plug from the hole in the clutch housing (see "Timing belt - replacement").
The belt must be clean - free of dirt and oil on its surface. A belt with tears, cracks, delaminations, sheared or worn teeth, scuffs to the cord must be replaced (see below, "Timing belt - replacement").
5. With two fingers, we try to turn the belt 90°in the area between the pulleys of the crankshaft and camshafts, applying a force of 15-20 Nm to it (1.5-2.0 kgf·m).
If the applied force is not enough to turn the belt to the required angle, then the belt will be overstretched; if the belt can be rotated to a greater angle, it is not tight enough.
Warning! Belt tension should be adjusted on a cold engine. Excessive tension on the belt, oil and dirt on it will shorten the life of the belt, as well as the idler roller bearings and the coolant pump. If the belt tension is low, it may jump over several teeth of the camshaft pulley.
6. To check the mutual position of the camshaft and crankshaft, set the piston of the first cylinder to the TDC of the compression stroke. For this:
A. We remove the rubber plug installed in the upper part of the clutch housing.
b. Through the resulting window with a slotted screwdriver with a wide blade, we turn the crankshaft by the teeth of the flywheel crown...
... until the mark on the camshaft pulley and the protrusion of the rear cover of the timing belt are aligned.
In this case, the mark on the flywheel should be aligned with the center of the scale.
Recommendations: If the mutual position of the crankshaft and camshaft is violated, then turn the crankshaft until the mark is aligned with the center of the scale. Loosen the belt tension and remove it from the camshaft pulley. Turn the camshaft until the mark on its pulley matches the protrusion on the rear cover. Without changing the relative position of the shafts, put the belt on the camshaft pulley and adjust the belt tension.
7. Key by 17 mm loosen the tightening nut of the tension roller.
8. By turning the roller with a special key, we adjust the belt tension and, holding the roller in this position, tighten the nut of its fastening.
9. Check the belt tension (see above) and, if necessary, repeat the adjustment.
10. Finally tighten the roller fastening nut to a torque of 33.2-41.2 N·m (3.4-4.2 kgf·m).
11. Reinstall the front cover of the belt and tighten the bolts of its fastening.