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Thread: Engine clatter on startup

  1. #11
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    During the last three weeks, I've noticed that 2017 Mirage SE occasionally makes noise on startup. It was really cold (0F) for several days and my car was in the garage and not being driven. I finally started it up and it sounded awful. Like someone shaking nails or marbles around in a coffee can. It lasted 2-4 seconds and went away. Then, last week, after the car sat for an entire day, it did it again. I think it has to do with setting over night, colder weather, and 0w20 weight oil. I use Fram or Mobil1 filters every time (the synthetic rated ones, not the cheapies) and Mobil1 0w20 full synthetic oil.



  2. #12
    Senior Member Alex1a1f's Avatar
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    Quote Originally Posted by Bigdeezy View Post
    During the last three weeks, I've noticed that 2017 Mirage SE occasionally makes noise on startup. It was really cold (0F) for several days and my car was in the garage and not being driven. I finally started it up and it sounded awful. Like someone shaking nails or marbles around in a coffee can. It lasted 2-4 seconds and went away. Then, last week, after the car sat for an entire day, it did it again. I think it has to do with setting over night, colder weather, and 0w20 weight oil. I use Fram or Mobil1 filters every time (the synthetic rated ones, not the cheapies) and Mobil1 0w20 full synthetic oil.
    Normal. We've all thought the same.
    (blank signature)

  3. #13
    Senior Member Cobrajet's Avatar
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    My car has been started 50-100 times a day, five days a week, for five years, and for 134,000 miles.

    It makes this same noise, and always has. I checked the compression at 96k and it was near factory new. Not something to worry about.

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    Daox (11-26-2019)

  5. #14
    Senior Member Wallythacker's Avatar
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    The clattering valve train noise is just a false flag. nothing to see here, move along.
    Zero, 2014 ES Plus 5MT, written off but not forgotten.
    Zero II, 2014 SE, 5MT, climate She's HOME now!
    Shelby AKA "Cute", 2017 ES 5MT, A/C.

    Mirage owners look at the world differently than everyone else, but in a better way
    We're driving the Beetle of the 21st century, the greatest small car now available!

        __________________________________________

        click to view fuel log View my fuel log 2017 Mirage ES PLus 1.2 manual: 39.0 mpg (US) ... 16.6 km/L ... 6.0 L/100 km ... 46.8 mpg (Imp)


  6. #15
    Senior Member AtomicPunk's Avatar
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    Mine does the same, although it kind of picks and chooses when it does it. My hypothesis (for MY car) is when temps drop, the 0W-20 is too thin at start up, or there something about the OEM filter that lets too much oil drainback at times. However, there are several threads on here about this, and it seems pretty common. Some have had good results going to 5w-30.

  7. #16
    Moderator Eggman's Avatar
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    I tried a thicker oil (5W-20) and it made the startup noise worse. I went back to 0W-20 and the startup noise is quieter and doesn't last as long.

    It is believed to be the valvetrain, which will clatter until it gets its lubrication. Because motor oil drains out of the head on the top of the engine, my best guess is this is normal for lots of engines, not just the 3A92. With that, the engine oil filter can have only so much effect here.

    Someone smarter than me will be by soon to correct my erroneous ways of thinking, I'm sure.

    Think of it as applause.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.7 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.7 mpg (Imp)


  8. #17
    Cornwallis Fummins's Avatar
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    Quote Originally Posted by Eggman View Post

    Someone smarter than me will be by soon to correct my erroneous ways of thinking, I'm sure.
    Where's Mark with a wikipedia link based argument?
    My mom says I'm cool

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.4 mpg (US) ... 15.9 km/L ... 6.3 L/100 km ... 44.9 mpg (Imp)


  9. #18
    Senior Member Top_Fuel's Avatar
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    Quote Originally Posted by Cobrajet View Post
    It makes this same noise, and always has.
    Mine too. And I've had my oil analyzed at least 3 times and there's nothing unusual in it. You'd think if the valvetrain was slowly destroying itself it would show up in an oil analysis.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 52.0 mpg (US) ... 22.1 km/L ... 4.5 L/100 km ... 62.4 mpg (Imp)


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  11. #19
    Moderator Eggman's Avatar
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    Quote Originally Posted by Fummins View Post
    Where's Mark with a wikipedia link based argument?
    I thought quoting Wikipedia was my thing. Mark is more rational and goes directly to the source.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.7 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.7 mpg (Imp)


  12. #20
    Cornwallis Fummins's Avatar
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    One day I'll pay attention.


    My mom says I'm cool

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.4 mpg (US) ... 15.9 km/L ... 6.3 L/100 km ... 44.9 mpg (Imp)


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