Diesel Data: Automotive Repair

Initial Inspection and Diagnostic Overview

Accessory Drive

Inspection and Verification
1. Verify customer concern by running the engine.
2. Inspect the drive belt for chunking, fraying, wear, and pilling.
3. Check the drive belt for correct routing.

Drive Belt Cracking/Chunking/Wear





V-Ribbed Serpentine Drive Belt With Cracks Across Ribs

The accessory drive:
^ has a single serpentine drive belt.
^ has an automatic drive belt tensioner.
^ does not require adjustment.





V-Ribbed Belt With Chunks of Rib Missing





V-Ribbed Belt With Piling

NOTE: Piling is an excessive buildup in the V-grooves of the belt.