1. Remove the top casing of a gear belt.
2. Press firmly on the toothed belt (arrow) and take it away from the tension roller.
3. Release the toothed belt, while the tension roller should return to its original position.
4. If the tension of the toothed belt has changed, it is necessary to check the injection timing of the high pressure fuel pump.
5. Establish the top casing of a gear belt.
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