Sequence of execution
1. Remove the front timing belt cover (see "Timing belt drive engine 1.6i - checking the condition and adjusting the tension").
Recommendation. When replacing the tension roller without removing the timing belt, there is a risk of the belt jumping over the pulley teeth, which will lead to a shift in the valve timing. Therefore, before releasing the belt tension, align the mark on the camshaft pulley with the protrusion on the rear belt cover (see "Timing Belt for 1.6i Engine — Replacement"). After installing the roller, the mark should not shift.
2. Loosen the tension roller mounting nut (see "Timing belt drive engine 1.6i - checking the condition and adjusting the tension") and turn it completely away.
3. Remove the roller from the pin, keeping the belt taut.
4. Install a new roller on the stud and secure it with a nut and washer, preventing the belt tension from slackening.
5. Adjust the tension of the timing belt (see "Timing belt drive engine 1.6i - checking the condition and adjusting the tension").
6. Install the front timing belt cover.