Four-cylinder engines
1. Release the toothed belt guard by depressing the fastening latches (see arrows in illustration).
2. Remove the top part of the toothed belt guard by pulling it up.
Attention! When installing the upper part of the protective cover, make sure that its lower edge fits into the corresponding recess on the bottom of the protective cover.
Usually, to perform the necessary work on the toothed belt, it is enough to remove only the upper part of its protective casing. If you need to remove the lower part, then do the following:
3. Remove the V-belt, see relevant chapter.
4. Turn out bolts of fastening and remove V-belt pulleys on a cranked shaft and on the water pump.
5. Turn out bolts and turn away fastenings of the bottom part of a protective casing of a gear belt and remove it. During subsequent installation, tighten the bolts securing the V-belt pulleys to the crankshaft and to the water pump to 20 Nm, and the bolts and nuts of the lower part of the toothed belt guard to 10 Nm.
Five-cylinder engine
Release the toothed belt guard by depressing the fastening latches
7. Remove the upper part of the toothed belt guard (see arrows in illustration).
8. Turn out bolts of fastening of the bottom part of a protective casing and remove it. When installing, tighten the screws securing the lower part of the protective cover with a torque of 10 Nm.
Six-cylinder engine
9. Remove the ribbed belt, as well as the ribbed belt tensioner, see the relevant chapter.
10. Squeeze on each part of the toothed belt guard one clamping bracket (see arrows in illustration).
11. Remove the protective cover.
Status check
12. Make sure the toothed belt is free of oil and cracks. The teeth of the belt must be intact with no signs of wear.
13. Rotate the engine to check the condition of the belt along its entire length. A defective belt must be replaced with a new one.
Tension check
The tension of the toothed belt is checked in the following places:
For a four-cylinder engine - in the segment between the camshaft gear and the countershaft gear. The toothed belt of a four-cylinder engine is correctly tensioned if it can be rotated 90°between the camshaft gear and the countershaft gear (see illustration 10.0b).
For a five-cylinder - on the segment between the gears of the camshaft and the water pump shaft. Illustration 10.0b shows the places and method for checking the tension of the toothed belt - it, like on a four-cylinder engine, must also turn 90°.
For a six-cylinder engine - in the segment between the camshaft gear and the upper guide roller. A correctly tensioned toothed belt must turn 90°in this section (see illustration 10.0g).
Attention! A whistle after starting a cold engine, which increases with increasing engine speed, indicates excessive tension on the toothed belt.
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