How to Inspect Serpentine Belt
Learn how to inspect serpentine belt with our detailed step-by-step guide. Follow our easy instructions to get it done right.
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0 of 6 steps completedStep-by-Step Instructions
1 Step 1: Locate Serpentine Belt
Step 1: Locate Serpentine Belt
Find belt on front of engine - long ribbed belt wrapping around multiple pulleys.
LED Flashlight
Bright light for inspecting belt in engine bay
2 Step 2: Check Belt Tension
Step 2: Check Belt Tension
Press on belt between pulleys - should deflect only 1/2 inch with firm pressure.
Belt Tension Gauge
Tool for measuring belt tension accurately
3 Step 3: Inspect Ribbed Side for Cracks
Step 3: Inspect Ribbed Side for Cracks
Look at inner ribbed surface for cracks across ribs - sign of age and need for replacement.
4 Step 4: Check for Glazing or Shiny Spots
Step 4: Check for Glazing or Shiny Spots
Glazed (shiny smooth) belt indicates slipping - replace even if no cracks visible.
5 Step 5: Look for Missing Chunks or Fraying
Step 5: Look for Missing Chunks or Fraying
Check edges for fraying or chunks missing from belt - immediate replacement needed.
6 Step 6: Replace if Over 60,000 Miles
Step 6: Replace if Over 60,000 Miles
Even if belt looks good, replace preventatively at 60-100k miles per manufacturer specs.
Replacement Serpentine Belt
New belt for preventative replacement