Drive Belt: Testing and Inspection

2ZR-FE ENGINE MECHANICAL: DRIVE BELT: 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 is found, replace the V-ribbed belt.

The belt is cracked.

The belt is worn out to the extent that the cords are exposed.

The belt has chunks missing from the ribs.

(b) Check that the belt fits properly in the ribbed grooves.





HINT
Check with your hand to confirm that the belt has not slipped out of the groove on the bottom of the pulley. If it has slipped out, replace the V-ribbed belt. Install a new V-ribbed belt correctly.

(c) Check that nothing gets caught in the tensioner by turning it clockwise and counterclockwise.

If a malfunction exists, replace the V-ribbed belt tensioner.

(d) 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)