Weakening
1. Remove the upper timing belt guard.
2. Loosen the 3 screws securing the water pump. Fold the shelf to the right with a crowbar and loosen the toothed belt.
Tension
Use a crowbar to turn the loosened pump to the left (up) and tighten the toothed belt.
Checking the timing belt tension
1. The timing belt should twist 90° when pressed with your thumb and forefinger in the middle between the camshaft drive gear and the water pump(1/4 turn). If more, tighten the belt.
(The article is published on this resource: VWmanual.ru)
2. Tighten the water pump mount to 20 Nm (the arrows indicate the water pump mounting bolts).
3. Turn the crankshaft 2 revolutions and check the tension of the toothed belt, adjust if necessary. To do this, engage 5th gear and push the car on a level surface or lift the car from the front and turn the front wheel.
4. Install the timing belt cover.
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