How to Test Serpentine Belt Tension

Beginner 10 min 15 steps 3922 views Rating: 3.7/5 Published: 2026-01-28

Look for a warning light on your dashboard.. Pay attention to the engine's temperature gauge.. Listen for belt squealing.

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Steps

1

Look for a warning light on your dashboard.

Step 1

Look for a warning light on your dashboard.

2

Pay attention to the engine's temperature gauge.

Step 2

Pay attention to the engine's temperature gauge.

3

Listen for belt squealing.

Step 3

Listen for belt squealing.

4

Take note if your air conditioner or power steering begin to fail.

Step 4

Take note if your air conditioner or power steering begin to fail.

5

Check the belt's tension if pulleys begin to fail.

Step 5

Check the belt's tension if pulleys begin to fail.

6

Turn the vehicle off and remove the keys from the ignition.

Step 6

Turn the vehicle off and remove the keys from the ignition.

7

Use a ruler to check the belt's tension.

Step 7

Use a ruler to check the belt's tension.

8

Check for cracks on the inside of the belt.

Step 8

Check for cracks on the inside of the belt.

9

Look for polished edges on the belt.

Step 9

Look for polished edges on the belt.

10

Check the belt grooves for glazing.

Step 10

Check the belt grooves for glazing.

11

Inspect the belt for damage.

Step 11

Inspect the belt for damage.

12

Locate your vehicle's specifications.

Step 12

Locate your vehicle's specifications.

13

Read the instructions on your tension gauge.

Step 13

Read the instructions on your tension gauge.

14

Press or pull the gauge into the belt at the midsection in the largest gap betwe

Step 14

Press or pull the gauge into the belt at the midsection in the largest gap between pulleys.

15

Compare the number provided by your gauge to the vehicles specifications.

Step 15

Compare the number provided by your gauge to the vehicles specifications.

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