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Thread: whats that noise? Update: Alternator bearing

  1. #71
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    Quote Originally Posted by benwerks View Post
    mission success. it was a bearing in the alternator pulley. pulled the alternator out in front of the shop this morning they had a new pulley on there within an hour. driving around now noise is gone.

    alternator removal and reinstallation difficulty 2/5

    also I replaced the serpentine belt with the RockAuto replacement
    Any theories on why this may have happened? Could an overly tightened serpentine belt have caused this?

    I am not trying to drag out this thread, & I am glad you got it fixed. Just wondering what your thoughts are on all this now that it is fixed?

    I realize mechanical things break sometime! It comes with owning stuff!



  2. #72
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    Quote Originally Posted by Mark View Post
    Any theories on why this may have happened? Could an overly tightened serpentine belt have caused this?

    I am not trying to drag out this thread, & I am glad you got it fixed. Just wondering what your thoughts are on all this now that it is fixed?

    I realize mechanical things break sometime! It comes with owning stuff!

    That is one of the primary causes of accessory pulley/bearing failures, yes.

  3. #73
    Senior Member Dirk Diggler's Avatar
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    Im just glad it was a bearing and not the alternator, those are like $800 on Mitsuparts.

  4. #74
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    Quote Originally Posted by Mark View Post
    Any theories on why this may have happened? Could an overly tightened serpentine belt have caused this?

    I am not trying to drag out this thread, & I am glad you got it fixed. Just wondering what your thoughts are on all this now that it is fixed?

    I realize mechanical things break sometime! It comes with owning stuff!
    my thoughts on what caused that are probably driving it on some of the worst mountain roads. driving from Denver to the Pacific Ocean in northern Oregon and then driving back to Denver earlier this year. the old belt was hold on much tighter than I had to tighten the new belt

    so in conclusion my thoughts are that bumpy roads and the OEM belt being too tight took out a faulty bearing.

  5. #75
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    Quote Originally Posted by Dirk Diggler View Post
    Im just glad it was a bearing and not the alternator, those are like $800 on Mitsuparts.
    the shop said it would have been about 80 bucks to do a complete rebuild

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    Quote Originally Posted by benwerks View Post
    my thoughts on what caused that are probably driving it on some of the worst mountain roads. driving from Denver to the Pacific Ocean in northern Oregon and then driving back to Denver earlier this year. the old belt was hold on much tighter than I had to tighten the new belt

    so in conclusion my thoughts are that bumpy roads and the OEM belt being too tight took out a faulty bearing.
    That's what I would have guessed, but I thought I would ask.

    Rebuilding an alternator for about $80 is also good information. That's 1/10th the cost of buying a new one!

    Mitsubishi over pricing their parts doesn't do much for their image. All car companies seem to do that, however. Short term greed that somewhat hurts long term profits in my opinion. Parts being unavailable or being very expensive doesn't promote return customers, & I have sense that complaint a few times from Mirage owners. Thankfully, the Mirage is fairly reliable overall!

  7. #77
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    Quote Originally Posted by Mark View Post
    Thankfully, the Mirage is fairly reliable overall!
    yeah i like my mirage and its cheaper than most peoples "toys"

  8. #78
    Moderator Eggman's Avatar
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    I modified the thread title to indicate the failure, making future searches easier. Also included the solution in the first post.

    Thanks benwerks.
    Last edited by Eggman; 08-20-2019 at 11:57 AM.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.9 mpg (US) ... 21.2 km/L ... 4.7 L/100 km ... 59.9 mpg (Imp)


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  10. #79
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    Quote Originally Posted by Eggman View Post
    Thanks benwerks.
    thank you, and thanks to everyone who tried to help. im glad if this is useful to anyone



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