Engine Drivetrain 1st Gen Cooper S Now I Know Why Belt Tensioner Stops Break...

Discussion in 'Tuning and Performance' started by minsanity, Jul 15, 2013.

  1. minsanity

    minsanity Well-Known Member

    Sep 11, 2009
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    Thanks, Dave. Been searching w/o any specific hits. Purpose of this experiment is really to share results.....We'll see once we hurdle the belt search challenge.
     
  2. Savvy

    Savvy Well-Known Member
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    It can... but you are better off buying the whole asembly.

    I actually went so far as to contact Stabilus about the cost to replace that little effer. One of their suppliers got back to me with a price that made me laugh hysterically.

    It's not that "cheap" $-wise anyway.
     

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  3. Dave.0

    Dave.0 Helix & RMW Powered
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    I have offen thought about braiding a bunch of office rubber bands together to get just the right tension and resistance and the rubber will absorb and damper any movement.

    I call it the Office Depot Mod. :idea::lol:
     
  4. minsanity

    minsanity Well-Known Member

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    Hehe, won't that slacken the belt, Dave? The Stab-o-shoc should dampen both tension & compression.
     
  5. Savvy

    Savvy Well-Known Member
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    read the spec sheet I posted. the tensile force generated is only 10N worth. compared to the 200N of compressive force.
     
  6. minsanity

    minsanity Well-Known Member

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    Thanks for the damper spec sheet, Savvy. Much like most dampers, resistance is greater on compression to prevent too much spring bounce. Too bad, they're not exactly durable & are priced ridiculously higher than a tensioner assembly.....Thanks, BMW MINI!

    The search for those Stretch belts continues....:fingerscrossed:
     
  7. ScottinBend

    ScottinBend Space Cowboy
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    The cost probably has to do with the fact that this engine may be the only one to use that size/spec of damper.
     
  8. Metalman

    Metalman Well-Known Member
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    Also listed as used by Mercedes...
     
  9. minsanity

    minsanity Well-Known Member

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    Help me comprehend why those longer rear hatch struts are way outpriced by the much smaller tensioner damper. That won't just be about supply & demand?

    Gates Micro-V Horizon Stretch Fit
    Contitech Elastic V-Ribbed Belts
    Goodyear Stretch
    Dayco ELA

    Searched all the above & never came up w/ details on our belt size equivalent.
     
  10. Metalman

    Metalman Well-Known Member
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    ^^^ Because they can...

    Spend $160.00 to keep a $17,000 MINI up and running....
     
  11. Dave.0

    Dave.0 Helix & RMW Powered
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    Or spend just $70.00 for the same part.:Thumbsup:
     
  12. sethat46

    sethat46 Well-Known Member

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    Yes sir! Just did mine with some help.
     
  13. minsanity

    minsanity Well-Known Member

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    I've changed the damper once though. After about 45k mi. A poll might show its average life. How often have you guys done yours?
     
  14. minsanity

    minsanity Well-Known Member

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    Just an update. I've tried how the drive felt w/ a busted tensioner damper, how new it felt w/ a new tensioner.......Dug into my tensioner assembly today for inspection. Damper resistance still good.
    Decided to swap it w/ the adjustable Alta. Marked the tiny stock tensioner stop above the spring as base for proper belt tension......
    Guess what....It felt better than when having a new damper. Call it psychological, but drive was way smoother. Alternator voltage saw consistent maxima/minima. Idle fluctuation range seems more limited.
    This is my 1st impression on test, not yet a recommendation. We'll have to see how this does long term.
    I'm still in search of those STRETCH Belts! Help me.:beer
     
  15. minsanity

    minsanity Well-Known Member

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    Update....after a lil over 5k mi of non-track use...my Stabilus tensioner damper is limp....dead...AGAIN....
    P_20160909_130445_zpssaayfjwt.jpg
    Renewing that 3yr old quest for 6PK1374-1388 StretchFit equivalent for a tensioner delete experiment.....Any help would be appreciated. Thanks, guys.:)
     
  16. Dave.0

    Dave.0 Helix & RMW Powered
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    See my other post to your duplicate post in another thread.

    Buy a new tensioner from Amazon. Tensioner a wear out just like belts, brakes and tire's. The little shock is not the only part that fails.
     
  17. minsanity

    minsanity Well-Known Member

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    But 5k mi is like oil change interval....unlike belts, brakes & tires, Dave.....& they're no longer $80 in Amazon.:(
     
  18. ZippyNH

    ZippyNH Well-Known Member

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    My best guess...
    A stretch to fit belt will not work on a MINI S due to the extra load of the SC...hate to be the Debbi downer on stuff...but maybe I'm the voice of reason....the fact that gen1 cars are a shrinking market.... doesn't bode well for many more changes beyong the "homebrew" type of changes....
    SURE, those belts work fine with an alternator and air-conditioning compressor....but you are likly doubling or trippling the load with a SC....
    Just make the best of it...heck....my car was still on the OEM unit with about 100,000 miles and 10 years....might have swapped it if I kept it....but I'm thinking cheaper units might get a junk strut to save a few $$....
     
  19. minsanity

    minsanity Well-Known Member

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    Thanks, Zip. We'll never know til we try. Stretch belts weren't used during the time the gen1s were designed. Might be worth giving it a shot. Worst thing is going back to stock. You reckon cheaper tensioner assemblies hook in a differently made or inferior Stabilus damper? Hmmmm.
     
  20. Dave.0

    Dave.0 Helix & RMW Powered
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