Drive Belt: Testing and Inspection

1NZ-FE ENGINE MECHANICAL: DRIVE BELT (for Sedan): ON-VEHICLE INSPECTION

1. INSPECT FAN AND GENERATOR V 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.

HINT
* The belt is cracked.
* The belt is worn out to the extent that the wires are exposed.
* The belt has chunks missing from the ribbed groves.

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





Text in Illustration





HINT
Check with your 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) Inspect the V belt deflection and tension.





Text in Illustration





Deflection:





Tension:





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

HINT
* When inspecting the V belt deflection, apply 98 N (10 kgf) tensile force to it.
* Perform the V belt inspection and adjustment while the engine is cold.
* V-ribbed belt tension and deflection should be checked immediately after installation of a new belt, and after cranking the engine when inspecting a used belt.
* Check the V belt deflection at the point between the specified pulleys where the deflection is greatest.
* When installing a new belt, set its tension to the intermediate value of the specification.
* When inspecting a belt which has been used for over 5 minutes, apply the Used Belt specifications.
* When reinstalling a belt which has been used for over 5 minutes, adjust its deflection and tension to the intermediate values of each Used Belt specification.
* V-ribbed belt tension and deflection should be checked after 2 revolutions of engine cranking.
* When using a belt tension gauge, confirm its accuracy by using a master gauge first.