Auto Parts and Repairs
Serpentine Belts
Ford E-250 Van

How do you adjust the tension on an automobile serpentine belt?

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2015-07-15 19:54:22
2015-07-15 19:54:22
1The tensioner is spring loaded, and no adjustment is provided, or required. 21 is correct. But if for some, to me, unfathomable reason, the belt should become loose, causing slippage, I can think of only 3 possible causes:

1. Someone, unknowingly removed and replaced the belt incorrectly, by MISROUTING the belt on the pulleys.

2. Someone, unknowingly replaced the belt with one of the wrong size.

3. One of the belt driven components [water pump, alternator, smog air pump, power steering pump, air conditioning compressor, etc.] has been replaced with a new unit which has a different sized pulley than the one replaced.

4. The tensioning SPRING in the auto tensioning arm has become weak, and if so the arm assembly must be replaced.

As 1 implies, there is no provision for adjustment, as the tensioner arm assembly is supposed to automatically maintain the proper tension. j3h.

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you do not adjust tension on a serpentine belt the tension is automatcally adjusted if the belt is loose, replace the belt SOME TIMES THE TENSIONER CAN BE WEEK ALSO.

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If it is a drive belt and not a serpentine belt is has no tensioner. You manually adjust the tension by normally adjusting tension by moving the alternator. Loosen to bolts holding the alternator in place and then adjust the tension. Tighten the bolts when the tension is right. If it is serpentine belt if you follow the belt around the the engine you will see the tensioner.

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There is no way to adjust the belt tensioner, if it's not keeping enough tension on the belt the complete tensioner itself will need replaced.

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Your Explorer has a serpentine belt tensioner which keeps the proper tension on the serpentine belt unless the tensioner has failed.

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To loosen the tension on a serpentine belt on a 2005 Grand Caravan 3.8L, turn the nut of the belt tension pulley to loosen it. Adjust the belt, then tighten the tension pulley by turning the nut in the opposite direction.

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