Drive Belt: Testing and Inspection

2ZR-FE ENGINE MECHANICAL: DRIVE BELT: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT V-RIBBED BELT





(a) Check the belt for wear, cracks or other signs of damage.
If any of the following defects are found, replace the V-ribbed belt.
- The belt is cracked.
- The belt is worn out to the extent that wires are exposed.
- The belt has chunks missing from the ribbed grooves.





(b) Check that the belt fits properly in the ribbed grooves.
HINT: Check by hand to confirm that the belt has not slipped out of the grooves on the bottom to the pulley. If it has slipped out, replace the V-ribbed belt. Install a new V-ribbed belt correctly.





(c) Check the V-ribbed belt deflection and tension.
Deflection:






Tension:





If the belt deflection is not as specified, adjust it.

HINT:
- When inspecting the V-ribbed belt deflection, apply 98 N (10 kgf) tensile force to it.
- After installing a new belt, run the engine for approximately 5 minutes and then readjust the tension to (new belt) specifications.
- Check the V-ribbed belt deflection and tension at the specified point.
- V-ribbed belt tension and deflection should be checked after 2 revolutions of the engine.
- V-ribbed belt tension and deflection should be checked at TDC crank angle and cold condition.
- When adjusting a belt, adjust its deflection and tension to the intermediate values of the specification.
- When reinstalling a belt which has been used for over 5 minutes, adjust its deflection and tension to the used belt specification.
- When using a belt tension gauge, confirm its accuracy by using a master gauge first.
If using a sonic tension meter:
Input data for sonic tension meter
Weight:
15 g/rib*m
Width:
6 ribs
Span:
188 mm (7.40 in.) (w/ air conditioning)
282 mm (11.1 in.) (w/o air conditioning)