Drive Belt: Testing and Inspection

ENGINE MAINTENANCE
Checking Drive Belts

WARNING: Be sure to perform when engine is stopped.

1. Inspect belts for cracks, fraying, wear and oil. If necessary, replace.





2. Inspect drive belt deflection at a point on the belt midway between pulleys.
^ Inspection should be done only when engine is cold, or over 30 minutes after engine is stopped.
^ Measure belt tension with tension gauge (BT3373-F or equivalent) at points marked shown in the figure.
^ When measuring deflection, apply 98 N (10 kgf, 22 lbs.) at the marked point.
^ Adjust if belt deflection exceeds the limit or if belt tension is not within specifications.

CAUTION:
^ When checking belt deflection or tension immediately after installation, first adjust it to the specified value. Then, after turning crankshaft two turns or more, re-adjust to the specified value to avoid variation in deflection between pulleys.
^ Tighten idler pulley lock nut by hand and measure deflection or tension without looseness.





Belt deflection and tension