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Old 08-17-2013, 07:39 PM   #1
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Default How to test a tensioner'* force on belt

I have 160k miles on my 03 leSabre. How can I test the belt tensioner to see if it needs replacement because the spring is not pulling as hard on the belt?

Is there a way to test?

I need to replace the heater bypass tubes and could replace tension while it'* off if it'* needed.
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Old 08-17-2013, 07:44 PM   #2
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Usually the belts stretch a tad which makes it seem like the tension isn't as good as it use to be. I've seen my tensioner sit at a different angle after I install a new belt.
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Old 08-20-2013, 08:26 AM   #3
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I have a 4.3l, my tensioner has 3 marks on it... if you are between the last 2 you should be good. I just changed my serpentine belt at 142,000
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Old 08-20-2013, 10:20 AM   #4
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look at the belt tensioner and see if the 2 marks line up. easiest way to tell
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