Belt tension check
Note: under «old belt» means a belt that has been on the engine for more than 5 minutes.
1. Check the belt for mechanical damage, wear, traces of oil and coolant.
2. Apply a force of 98 N (10 kg) and measure the belt deflection between the alternator and coolant pump pulleys.
Belt deflection:
- new belt - 3.3-3.7mm;
- belt used is 4.2-4.7mm.
3. If a special tool is available, measure the belt tension following the instructions in the tool's instruction manual.
Belt tension:
- new belt - 637.4-735.5 N;
- used belt - 392.3-490.3 N.
Note: When installing a new belt, adjust the deflection or tension of the belt to the values intended for new belts. Then start the engine and let it run for 5 minutes. Stop the engine and adjust the deflection or tension of the belt to the values intended for the belts being used.
Belt tension adjustment
4. Loosen the adjusting (A) and blocking (IN) bolts. Move the alternator to achieve the required belt tension and tighten the nuts.
5. Recheck belt deflection or tension.
Belt replacement
6. To replace the alternator drive belt, remove the coolant pump pulley by unscrewing the four screws.
7. Remove the alternator drive belt and replace it with a new one.