Drive Belt: Testing and Inspection

Alternator Belt Inspection And Adjustment

NOTE:
When using a new belt, first adjust the deflection or tension to the values for the new belt, then readjust the deflection or tension to the values for the used belt after running engine for five minutes.

Deflection method :
Apply a force of 98N (10 kgf, 22 lbf), and measure the deflection between the alternator and water pump pulley.

Deflection
Used Belt : 5.1 - 6.0 mm (0.20 - 0.236 in)
New Belt : 4.0 - 4.4 mm (0.15 - 0.173 in)


NOTE:
If the belt is worn or damaged, replace it.




Belt tension gauge method :
Follow the gauge manufacturer's instructions, install the belt tension gauge. (Measurement may be done at any pulley span)

New Belt :686 ± 49 N (70 ± 5 kgf, 154 ± 11 lbf)
Used Belt :441 ± 49 N (45 ± 5 kgf, 99 ± 11 lbf)


NOTE:
If the belt is worn or damaged, replace it.




If adjustment is necessary :
1. Loosen the lock bolt(B) first, and then the adjusting bolt(A).
2. Move the alternator to obtain the proper belt tension, then retighten the bolts.




3. Recheck the deflection or tension of the belt.