Diagnostic Aids
Excessive wear on a drive belt is usually caused by incorrect installation or the incorrect drive belt for the application.
Minor misalignment of the accessory drive pulley does not cause excessive wear, but probably causes the drive belt to make noise or fall off.
Excessive misalignment of the accessory drive pulley causes excessive wear and may also make the drive belt fall off.
Test Description
The numbers below refer to the steps in the diagnostic table.
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This step inspects and verifies that the drive belt is correctly installed on all of the accessory drive pulleys. Wear on the drive belt may be caused by the drive belt being mispositioned on one or more of the grooves on a pulley.
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The installation of a drive belt that is too wide or too narrow causes wear on the drive belt. The drive belt ribs should match all of the grooves on the pulleys.
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This step inspects and verifies that the drive belt is not contacting any part of the engine or body while the engine is operating. There should be sufficient clearance when the accessory drive component load varies. The drive belt should not come in contact with an engine or a body component when snapping the throttle.
Step | Action | Yes | No |
|---|---|---|---|
|
Notice: Refer to Belt Dressing Notice in the Preface section. DEFINITION: Wear at the outside ribs of the drive belt, due to incorrect installation of the drive belt. | |||
1 | Did you review the Symptoms - Engine Mechanical and perform the necessary inspections? | Go to Step 2 | |
Inspect the drive belt for proper installation. Is the drive belt installed properly? | Go to Step 5 | Go to Step 3 | |
Inspect for the correct drive belt. Is the correct drive belt installed? | Go to Step 5 | Go to Step 4 | |
Inspect the drive belt for signs of rubbing against a bracket, hose or wiring harness. Was the drive belt rubbing against anything? | Go to Step 5 | Go to Diagnostic Aids | |
5 | Replace the drive belt. Refer to Drive Belt Replacement - Accessory or Drive Belt Replacement - Air Conditioning. Did you complete the replacement? | Go to Step 6 | -- |
6 | Run the engine in order to verify the repair. Is there still excessive drive belt wear? | -- | System OK |
