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Thread: whats that noise?

  1. #11
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    Quote Originally Posted by dspace9 View Post
    I'll prolly get flack for this but, don't run premium in a regular octane car.

    I've had my Mirage 5.5 years, it's a 2014, I never sampled with premium gas, always get 43 MPG-- no issues. Motor purrs like a kitten. Experiments like this, well, cars are too expensive. I don't got no extra money.
    i wouldnt have run premium but the gas station i stopped at ran out of reg and lowered the price of premium for the night. ran half of it then refilled with regular.



  2. #12
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    Quote Originally Posted by Loren View Post
    Check the accessory belt tensioner. A failing bearing there could make a noise like that.
    i will check that today

  3. #13
    Senior Member Fummins's Avatar
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    Quote Originally Posted by benwerks View Post
    i will check that today
    There is no belt tensioner pulley. Crank,waterpump, alternator and ac. Wouldn't hurt to pull the belt off and run it. See if the noise is gone. If it is then spin each pulley and hopefully narrow it down from there. If the noise is still there then it's internal. Not sure why I didn't think of that by now.
    Truck
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    Optima

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    Dirk Diggler (08-15-2019),Loren (08-14-2019)

  5. #14
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    Quote Originally Posted by Fummins View Post
    There is no belt tensioner pulley. Crank,waterpump, alternator and ac. Wouldn't hurt to pull the belt off and run it. See if the noise is gone. If it is then spin each pulley and hopefully narrow it down from there. If the noise is still there then it's internal. Not sure why I didn't think of that by now.
    i will have to wait until tomorrow to do that when i have the space to work

  6. #15
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    Quote Originally Posted by dspace9 View Post
    I'll prolly get flack for this but, don't run premium in a regular octane car.

    I've had my Mirage 5.5 years, it's a 2014, I never sampled with premium gas, always get 43 MPG-- no issues. Motor purrs like a kitten. Experiments like this, well, cars are too expensive. I don't got no extra money.

    Premium gas won't hurt his car, just his wallet.

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    Fummins (08-14-2019)

  8. #16
    Senior Member Top_Fuel's Avatar
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    Quote Originally Posted by Fummins View Post
    ...pull the belt off and run it. See if the noise is gone.
    +1 on this idea.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 51.5 mpg (US) ... 21.9 km/L ... 4.6 L/100 km ... 61.9 mpg (Imp)


  9. #17
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    Quote Originally Posted by Eggman View Post
    Hello benwerks and welcome to the forum.

    I can't say I've heard a noise like that out of my 2015. Is sure sounds like the accessory belt. At least that sound is isolated to the engine and there is no need to wonder if it is related to any other part of the drivetrain. Your engine turned over fast, so I rather doubt it's a failing battery - one that would put a strain on an alternator.

    So, when did you first notice this? What other checks have you made? How is your A/C? I'm guessing you have a CVT? Feel free to make a forum Garage entry. The link can be found to the left-hand column next to your post.

    Garage empty: add car

    There is a post from MrNuff discussing his high mileage cvt where he states his A/C sounds like, and I quote:
    "a crap turbine". Maybe a similar sound as this one?

  10. #18
    Senior Member Dirk Diggler's Avatar
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    I experienced this same noise briefly and much quiter. It didnt have that start up roar like the vid. But I could hear it whirring just like that for about 2 minutes while cruising around 40mph.

  11. #19
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    Quote Originally Posted by benwerks View Post
    https://youtu.be/qeWP75IKYfc

    any idea what the higher pitched noise is?

    2015 mirage hatchback 70k miles. the main belt is taught and not cracked or rotted.


    Any update on this noise?

  12. #20
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    Quote Originally Posted by AtomicPunk View Post
    Any update on this noise?
    not yet. my driveway time got delayed until friday afternoon.



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