Serpentine belt installation issue

2007 HYUNDAI SONATA
293,213 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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STEWBUURNER
  • MEMBER
  • 2 POSTS
Replaced alternator and can’t get serpentine belt to tighten back up.
Aug 25, 2019 at 2:43 PM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Welcome to 2CarPros.

First, confirm the belt is properly routed. See pictures 1 and 2.

If it is routed correctly and the belt is the correct one, suspect the belt tensioner is bad or the pulley on the new part is different.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Aug 25, 2019 at 8:50 PM
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STEWBUURNER
  • MEMBER
  • 2 POSTS
Belts are routed properly but still can’t get proper tension.
Aug 31, 2019 at 9:44 AM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Welcome back:

If it is, then it can be one of three things. Either the belt is too long (if it's new), the pulley on the new alternator isn't the same diameter, or the tensioner is bad. Can you check the pulley size and let me know if the belt is new?

Take care,
Joe
Aug 31, 2019 at 8:45 PM