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Thread: 3A92 engine parts history (changes over the years)

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    Administrator Daox's Avatar
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    3A92 engine parts history (changes over the years)

    So, I was nerding it up today and digging through a Mitsu parts distributor's site. I decided to copy and paste their parts list into excel and see exactly what changed over the years. For those who want to know the inner workings of things so you can do future upgrades, or upgrades when components wear out, etc. its quite interesting.

    2014
    - Mid year (4/1/14) new engine mount strut. #4 on the diagram.
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    - Mid year (4/1/14) new front crank (front main) seal. #5 on the diagram.
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    2015
    - No changes.

    2017
    - New side mount. #1 on the diagram.
    - New transmission mount. It now has a separate part number for auto and maunal trans. #8 on the diagram.
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    - New roller camshafts. Intake camshaft is new for the auto and manual. The exhaust camshaft is new for the auto, but the exhaust camshaft is the same for the manual. #16 and 17 on the diagram.


    - New timing chain.
    Quote Originally Posted by 3dplane View Post
    there are a lot more efficiency changes in the engine like ... the timing chain inner link plates are made to "stick out" little bumps to reduce friction rubbing on the guides vs.the 'old' design where the entire edge of the chain assembly is rubbing on the guides.
    - New front cover. #22 on the diagram.
    - New control valve solenoid. #24 on the diagram.
    - New piston. Assumed to have added an anti-friction coating on the skirts. #26 on the diagram.
    - New crankshaft bearings. Assumed to have added an anti-friction coating. #29 on the diagram.
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    - Mid year (8/17) new mass air flow sensor. #12 on the diagram. Added o-ring as separate part number for sensor. #11 on the diagram.
    - New resonator for automatic transmission. Now separate part numbers for auto/manual. #16 on the diagram.
    - Added an air guide and clip (these parts were absent on previous years). #20 and 21 on the diagram.
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    - New exhaust manifold with integrated catalytic converter (cat).
    2014 -2015
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    2017 -




    Parts list:

    Green highlighting indicates a change.

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        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 49.0 mpg (US) ... 20.8 km/L ... 4.8 L/100 km ... 58.8 mpg (Imp)


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    Administrator Daox's Avatar
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    Reserved for future use.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 49.0 mpg (US) ... 20.8 km/L ... 4.8 L/100 km ... 58.8 mpg (Imp)


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    Administrator Daox's Avatar
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    If anyone has any insights into the changes, or additional information about the changes please let me know so I can add it.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 49.0 mpg (US) ... 20.8 km/L ... 4.8 L/100 km ... 58.8 mpg (Imp)


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    Administrator Daox's Avatar
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    Yep, I've been using Mitsu parts warehouse. Very useful!

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 49.0 mpg (US) ... 20.8 km/L ... 4.8 L/100 km ... 58.8 mpg (Imp)


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    Quote Originally Posted by Daox View Post
    2017...

    - New roller camshafts. Intake camshaft is the same for auto/manual, but exhaust camshaft has separate part numbers for auto/manual.

    It'd be interesting to get profile specs on these. One may be better suited for efficiency than the other. In which case... cam swap!

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


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    I agree, it would be really interesting to see the differences and even get someone to measure both the 2014/2015 and 2017+ cam shafts.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 49.0 mpg (US) ... 20.8 km/L ... 4.8 L/100 km ... 58.8 mpg (Imp)


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    Added the changes to the 2017 exhaust manifold.


        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 49.0 mpg (US) ... 20.8 km/L ... 4.8 L/100 km ... 58.8 mpg (Imp)


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