Recommendation. If, when the engine is running, a strong rotating bearing noise is heard in the area under the front timing belt covers (see «Engine - condition check»), the condition of the idler and idler rollers should be checked and replaced if necessary. This can be done without removing the belt. Also, the rollers should be replaced during the routine replacement of the timing belt (see «Timing belt - replacement»).
Examination
1. We prepare the car for work (see «Preparing the car for maintenance and repair»).
2. Remove the upper front timing belt cover (see «Timing Belt - Checking Condition»).
3. With a 15 mm wrench, unscrewing the tension roller mounting bolt by half a turn, we loosen the tension of the timing belt.
Comment. To replace the rollers without removing the timing belt, it is enough to loosen the belt tension. In this case, there is a risk of the belt jumping over the pulley teeth, which will lead to a shift in the valve timing. Therefore, before loosening the belt tension, align the marks on the camshaft pulleys with the protrusions of the rear belt cover (see «Timing belt - replacement»). After installing the rollers, the marks should not move.
4. Remove the timing belt (see «Timing belt - replacement») from the tension roller.
5. Rotating the tension and guide rollers, check their condition.
Recommendation. Rollers that have play and make a lot of noise when rotating must be replaced.
Removing
1. With a 15 mm wrench, unscrew the bolt of the tension roller and remove it, the roller together with the bolt.
2. Remove the guide roller in the same way.
Installation
1. Install the guide roller and tighten the bolt of its fastening to a torque of 33.2-41.2 Nm (3.4-4.2 kgcm).
2. Install the tension roller without tightening the mounting bolt.
3. We put the timing belt on the pulleys and adjust its tension (see «Timing belt - replacement»).
4. Install the removed parts in the reverse order of removal.