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Serpentine belt keeps jumping pulley (FIXED)

Discussion in '2nd Gen. Tacomas (2005-2015)' started by anthony250f, Jul 23, 2019.

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  1. Jul 23, 2019 at 8:29 AM
    #1
    anthony250f

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    anthony250f [OP] Well-Known Member

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    My belt keeps jumping the pulley at the same spot on the water pump. Any idea why? All the idlers and tensioner have been replaced in the last year

    61ABB1CD-3963-4728-8C5C-BF54B9371801.jpg 20729A87-0C5C-4F1D-B307-AB37BD473C83.jpg
     
    anthony250f, Jul 23, 2019
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  2. Jul 23, 2019 at 8:54 AM
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    15TACOSPORT4X4

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    15TACOSPORT4X4 Well-Known Member

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    How often does this happen ? Every time you first crank it up or randomly as your driving it. How old is the belt ?
     
    15TACOSPORT4X4, Jul 23, 2019
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  3. Jul 23, 2019 at 8:54 AM
    #3
    anthony250f

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    anthony250f [OP] Well-Known Member

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    Just randomly

    Belt is brand new
     
    anthony250f, Jul 23, 2019
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  4. Jul 23, 2019 at 8:56 AM
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    15TACOSPORT4X4

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    15TACOSPORT4X4 Well-Known Member

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    Did you replace the idlers and tensioners your self or have it done.
     
    15TACOSPORT4X4, Jul 23, 2019
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  5. Jul 23, 2019 at 8:57 AM
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    lynlan1819

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    lynlan1819 Well-Known Member

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    Replace your tension pulley unit.
     
    lynlan1819, Jul 23, 2019
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  6. Jul 23, 2019 at 8:58 AM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    The tensioner is nearly brand new. When I replaced the belt a few days ago the tensioner was very strong still
     
    anthony250f, Jul 23, 2019
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  7. Jul 23, 2019 at 8:59 AM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    Replaced them myself. It’s been probably 20k miles since I did that. This issue is new as of this week.
     
    anthony250f, Jul 23, 2019
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  8. Jul 23, 2019 at 9:02 AM
    #8
    15TACOSPORT4X4

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    15TACOSPORT4X4 Well-Known Member

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    It is possible if not installed right or maybe over tightened the pulley wont spin freely and cause this to happen.
     
    15TACOSPORT4X4, Jul 23, 2019
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  9. Jul 23, 2019 at 9:09 AM
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    15TACOSPORT4X4

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    15TACOSPORT4X4 Well-Known Member

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    Do you off road a lot. Water and bearings don't like each other. Maybe take the belt off and spin all pulleys by hand to see how free they spin. Cant hurt to try.
     
    15TACOSPORT4X4, Jul 23, 2019
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  10. Jul 23, 2019 at 9:09 AM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    I removed and cleaned all pulleys a few days ago.

    Here’s a little time line.

    2018 replaced idler pulleys (no issues)

    June 2018....modified fan clutch to be “on” more

    July 2018....belt shredded and got stuck behind crank pulley. Truck towed home

    July 2018....brand new belt, crank pulley, and Entire tensioner assembly.

    JULY 2019....serp belt jumps pulley

    JULY 2019...few days later and about 500 miles belt jumps again


    To me it’s starting to look like it may be the fan clutch? I’m going to put it back to stock, or close to it
     
    anthony250f, Jul 23, 2019
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  11. Jul 23, 2019 at 9:10 AM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    Not really anymore. I checked all of the pulleys the other day and they are all good to go
     
    anthony250f, Jul 23, 2019
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  12. Jul 23, 2019 at 9:20 AM
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    15TACOSPORT4X4

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    15TACOSPORT4X4 Well-Known Member

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    You might be right with that fan clutch. All it takes is one part of that system to hesitate and momentum takes over. Let us know if that stopped it or not.
     
    15TACOSPORT4X4, Jul 23, 2019
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    anthony250f[OP] likes this.
  13. Jul 23, 2019 at 9:24 AM
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    PzTank

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    PzTank Stuck in the Well

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    PzTank, Jul 23, 2019
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  14. Jul 23, 2019 at 9:27 AM
    #14
    anthony250f

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    anthony250f [OP] Well-Known Member

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    Yup I’m def gonna reverse that mod lol
     
    anthony250f, Jul 23, 2019
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    DesertRatliff and PzTank[QUOTED] like this.
  15. Jul 23, 2019 at 9:28 AM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    Yeah I noticed if I really floor it the belt would squeak, likely from the fan clutch h being more engaged and having more resistance
     
    anthony250f, Jul 23, 2019
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  16. Jul 23, 2019 at 9:31 AM
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    Fullboogie

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    Fullboogie Well-Known Member

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    Anybody else think the fan doesn't look right? A couple of those nuts don't look tightened down all the way.
     
    Fullboogie, Jul 23, 2019
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  17. Jul 23, 2019 at 9:35 AM
    #17
    anthony250f

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    anthony250f [OP] Well-Known Member

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    I think I agree. I should definitely check those out. If they are loose it would explain this issue
     
    anthony250f, Jul 23, 2019
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  18. Jul 23, 2019 at 9:48 AM
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    lynlan1819

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    lynlan1819 Well-Known Member

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    Okay,then one of you pulleys is either junk or not lining up properly.
     
    lynlan1819, Jul 23, 2019
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  19. Jul 23, 2019 at 9:53 AM
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    anthony250f

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    anthony250f [OP] Well-Known Member

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    It would have to be one of the pulleys with grooves I would think. I have no clue because I checked every single pulley except the water pump.

    The water pump has been replaced in the last year as well with an OEM pump
     
    anthony250f, Jul 23, 2019
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  20. Jul 23, 2019 at 9:55 AM
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    lynlan1819

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    lynlan1819 Well-Known Member

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    Unless your fan pulley is not SEATED correctly.
     
    lynlan1819, Jul 23, 2019
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