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Thread: TD5 serpentine belt tensioner

  1. 15th June 2015, 08:40 PM #1
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    TD5 serpentine belt tensioner

    I have an non-rhythmic tapping or knocking sound coming from the serpentine belt area of the engine. After a good deal of time looking around with the engine running the noise seems to be associated with movement of the serpentine belt tensioner. At idle speed the tensioner pulley doesn't run smoothly all the time but has bouts of what i can only describe as jiggity behaviour. I'm tempted to replace the tensioner thinking that maybe the tensioning mechanism is failing - am i on the right path here..... 2000kms ago i had a new viscous fan coupling and hub bearing installed.

    onebob
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  2. 15th June 2015, 09:39 PM #2
    twr7cx
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    Part number is ERR6951

    Easy job to do. Replacement part is as low as $30.00 for a pattern. Genuine is relatively expensive in comparison.
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  3. 16th June 2015, 06:20 AM #3
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    Quote Originally Posted by twr7cx View Post
    Part number is ERR6951

    Easy job to do. Replacement part is as low as $30.00 for a pattern. Genuine is relatively expensive in comparison.
    Thanks for the helpful response - can i also take from it that what i'm obeserving is typical of a failing tensioner in your experience....?

    onebob
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  4. 16th June 2015, 12:34 PM #4
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    It may also be the idler puller bearing if fitted(non ACE).
    If changing any of the idler/tensioner/hub bearings I always changed the lot.
    Old ones into the back for the breakdown kit with a spare belt.


    Try removing the belt and spinning each pulley up and listen for noises and feel for notchey bearings.
    Cheers, Kyle



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  5. 16th June 2015, 02:58 PM #5
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    My brand new tensioner still seems to jiggle about as you describe!
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  6. 16th June 2015, 03:51 PM #6
    PhilipA
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    They all jiggle about on idle AFAIK. Mine does even when brand new.

    I would be looking closely at the harmonic balancer if you have noise as well.
    Regards Philip A
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  7. 16th June 2015, 07:53 PM #7
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    Quote Originally Posted by alien View Post
    It may also be the idler puller bearing if fitted(non ACE).
    If changing any of the idler/tensioner/hub bearings I always changed the lot.
    Old ones into the back for the breakdown kit with a spare belt.


    Try removing the belt and spinning each pulley up and listen for noises and feel for notchey bearings.
    Thanks for the tips ..... BTW I do have ACE
    LROCV member #131
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  8. 16th June 2015, 07:58 PM #8
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    Quote Originally Posted by PhilipA View Post
    They all jiggle about on idle AFAIK. Mine does even when brand new.

    I would be looking closely at the harmonic balancer if you have noise as well.
    Regards Philip A
    Hmmmmmmmm!! - looked closely at the HB and there's no wobble at idle. I guess that I gotta get the belt off and look at each of the items in the serepentine drive train individually....

    thanks to all contributors

    onebob
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  9. 16th June 2015, 08:02 PM #9
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    Would the tensoiner cause a squeak on start up and shutdown? like the belt getting too loose and slipping if it isn't keeping it tight enough?

    Mine vibrates a bit too but I cant get rid of the squeak!!

    Brian
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  10. 16th June 2015, 08:26 PM #10
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    Quote Originally Posted by goanna_shire View Post
    Would the tensoiner cause a squeak on start up and shutdown? like the belt getting too loose and slipping if it isn't keeping it tight enough?

    Mine vibrates a bit too but I cant get rid of the squeak!!

    Brian
    The Genuine LR contitech belt has a non squeak flat smooth side to prevent the squeak.
    Regards
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