Envoy 4WD V8-5.3L VIN M (2005)
Drive Belt: Testing and Inspection
Drive Belt Excessive Wear
Drive Belt Excessive Wear Diagnosis
Diagnostic Aids
Excessive wear on a drive belts is usually caused by incorrect installation or the incorrect drive belts for the application.
Minor misalignment of the accessory drive pulleys will not cause excessive wear, but will probably cause the drive belts to make a noise or fall off.
Excessive misalignment of the accessory drive pulleys will cause excessive wear and may also make the drive belts fall off.
Test Description
The numbers below refer to the steps in the diagnostic table.
2. This inspection is to verify that the drive belts is correctly installed on all of the accessory drive pulleys. Wear on the drive belts may be caused by
incorrect positioning of the drive belts by one or more grooves on a pulley.
3. The installation of a drive belts that is too wide or too narrow will cause wear on the drive belts. The drive belts ribs should match all of the
grooves on the pulleys.
4. This inspection is to verify that the drive belts is not contacting any part of the engine or body while the engine is operating. Provide sufficient
clearance when the accessory drive components load varies. The drive belts should not come in contact with an engine or a body component when
snapping the throttle.
