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Pulley Tensioner

This is a discussion on Pulley Tensioner within the External Engine forums, part of the LSx Technical Help Section category; How do you know when your pulley tensioner needs to be replaced?...

  1. #1
    Spaz is My Mentor SMWS6TA's Avatar
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    Pulley Tensioner

    How do you know when your pulley tensioner needs to be replaced?
    Last edited by SMWS6TA; 02-26-2010 at 01:18 PM.

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    Mine have always gotten noisey and/ or wobbly. Get a Katech if you can.....

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    Senior Member JaycenK's Avatar
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    The tensioner pulley or the tensioner spring? I am LT1 so I don't know if there are the same type tensioner. The spring usually will be good for a long time and the pully usually looses the bearing. If you have a bad bearing that transfers a lot of heat to the spring it can weaken it but there are usually marks on the tensioner that show where the tensioner should be. It's a range and it depends on how stretched the belt is. On a new belt the tensioner should never leave the range. If it does the spring could be weak or there may be a problem with another pulley or accessory.

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    Veteran Hi-Po's Avatar
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    If your belt starts walking off, or gets completely thrown off, its time to replace. I put a Katech tensioner on mine and it works flawlessly, highly recommend it over a stock replacement.
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    Spaz is My Mentor SMWS6TA's Avatar
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    I'm thinking it may be time for a new belt. I checked it again this past weekend and wasn't getting any noise. I have no idea when the belt was last changed, I've only had the car for a yr and I've been replacing worn out stuff as well as installing performance upgrades. I'm asking only because when I do a medium to hard launch my check gauges light comes on and my volts gauge drops into the 9 -10 volt range , then climbs back up after I get to cruise. I know I have a PS hose leak that's going to get fix somehow this weekend. I hate GM for putting the alternator below the PS Pump. Dumbass engineers.

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    Change the belt.

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    Senior Member redbird555's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    I'm thinking it may be time for a new belt. I checked it again this past weekend and wasn't getting any noise. I have no idea when the belt was last changed, I've only had the car for a yr and I've been replacing worn out stuff as well as installing performance upgrades. I'm asking only because when I do a medium to hard launch my check gauges light comes on and my volts gauge drops into the 9 -10 volt range , then climbs back up after I get to cruise. I know I have a PS hose leak that's going to get fix somehow this weekend. I hate GM for putting the alternator below the PS Pump. Dumbass engineers.
    Just some food for thought but the voltage and power steering could be connected. ive seen a number on these cars on tech where a hose ruptures and squirts fluid into the alternator causing intermitant shorts just like u describe, eventually it just kills the alternator.

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    Quote Originally Posted by redbird555 View Post
    Just some food for thought but the voltage and power steering could be connected. ive seen a number on these cars on tech where a hose ruptures and squirts fluid into the alternator causing intermitant shorts just like u describe, eventually it just kills the alternator.
    Had this happen to me......

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    They will also chatter sometimes @ idle and then it will sometimes go away when giving it some throttle.. A dry bearing is easily detected by removing the belt and spinning the pully. If it makes a marble rolling on the floor sound, this is usually a good indicattion of a dry bearing. A dry bearing = a fail will come eventually..
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    Spaz is My Mentor SMWS6TA's Avatar
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    Thx's all I check into them this week end and will post what I find.

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