Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Alternator Drive Belt




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 value for the used belt after running engine for five minutes.

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

Deflection used belt: 5.0 - 6.0 mm (0.1969 - 0.2362 in)
New belt: 4.0 - 5.0 mm (0.1575 - 0.1969 in)

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

Belt tension gauge method:
Attach the belt tension gauge to the belt and measure the tension. Follow the gauge manufacturer's instructions.

Tension Used belt: 343.2 - 490.3 N (35 - 50 kg, 77.2 - 11 0.2 lb)
New belt: 539.4 - 637.4 N (55 - 65 k, 121.3 - 143.3 lb)
Deflection used belt: 5.0 - 6.0 mm (0.1969 - 0.2362 in)
New belt: 4.0 - 5.0 mm (0.1575 - 0.1969 in)







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

1. Loosen adjusting bolt (A) and the lock bolt (B).




2. Move the alternator to obtain the proper belt tension, then roughen the nuts.
3. Recheck the deflection or tension of the belt.

NOTE: For the power steering pump belt and A/C compressor belt adjustments, refer to power steering pump and air conditioner compressor.