Serpentine belt installation issue

STEWBUURNER

MEMBER
2007 HYUNDAI SONATA
2.4L
4 CYL
2WD
AUTOMATIC
293,213 MILES

Replaced alternator and can’t get serpentine belt to tighten back up.

Sunday, August 25th, 2019 AT 2:43 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
108,133 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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Sunday, August 25th, 2019 AT 8:50 PM

STEWBUURNER

MEMBER
2 POSTS

Belts are routed properly but still can’t get proper tension.

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Saturday, August 31st, 2019 AT 9:44 AM

JACOBANDNICKOLAS

MECHANIC
108,133 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

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Saturday, August 31st, 2019 AT 8:45 PM