Detect and Prevent Engine Belt Slip or Failure

Cost Savings

Checklist Tasks

• Inspect serpentine and timing belts for micro-cracks or early wear.
• Check belt tension with a gauge to meet specifications and prevent slippage.
• Look for glazing or shine on belts, which signal grip loss or overheating.
• Rotate pulleys by hand to detect roughness or wobble.
• Use a stethoscope to listen for squeals at start-up, a sign of slippage.
• Examine belt edges for fraying or uneven wear indicating misalignment.
• Test automatic tensioners for smooth operation.
• Check for oil or coolant on belts; fluids degrade rubber and cause slip.
• Measure pulley grooves for debris or corrosion.
• Review service records for overdue belt changes.
• Inspect idler and accessory pulleys for seized or noisy bearings.
• Document results and recommend belt replacement for critical wear.