Page 1 of 2 12 LastLast
Results 1 to 10 of 15

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

  1. #1
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    3,923
    Thanks
    1,982
    Thanked 1,109 Times in 640 Posts

    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.
    Name:  strut.png
Views: 535
Size:  40.0 KB
    - Mid year (4/1/14) new front crank (front main) seal. #5 on the diagram.
    Name:  684a66239a8e1b76d02c60edd294f890.png
Views: 561
Size:  94.0 KB


    2015
    - No changes.


    2017
    - New transmission mount. It now has a separate part number for auto and maunal trans. #8 on the diagram.
    Name:  strut.png
Views: 535
Size:  40.0 KB
    - 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.


    - An image from a 2017 automatic engine.


    - 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 piston ring. Added DLC (diamond like carbon) coating.


    - New crankshaft bearings. Assumed to have added an anti-friction coating. #29 on the diagram.
    Name:  797b4d8937e188b1b007aa62244d92af.png
Views: 514
Size:  46.7 KB
    - 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.
    Name:  e0454bab73e1daa0b87424c347b13198.png
Views: 509
Size:  67.7 KB


    - New exhaust manifold with integrated catalytic converter (cat).
    2014 -2015
    Name:  2014exhaustmanifold.png
Views: 472
Size:  57.0 KB

    2017 -




    - New oxygen sensors, upper and lower are new. Upper at least is now a linear air fuel sensor instead of traditional O2 sensor. Auto and manual have different part numbers too.









    Parts list:

    Green highlighting indicates a change.









    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing
    Current project: Developing a rear sway bar alternative

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 41.7 mpg (US) ... 17.7 km/L ... 5.6 L/100 km ... 50.0 mpg (Imp)


  2. The Following 8 Users Say Thank You to Daox For This Useful Post:

    01-7700 (01-18-2018),3dplane (01-19-2018),Adam - UK (02-24-2018),Eggman (12-06-2017),HydroJim (12-15-2017),inuvik (12-06-2017),MetroMPG (12-06-2017),MightyMirageMpg (12-06-2017)

  3. #2
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    3,923
    Thanks
    1,982
    Thanked 1,109 Times in 640 Posts
    Reserved for future use.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing
    Current project: Developing a rear sway bar alternative

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 41.7 mpg (US) ... 17.7 km/L ... 5.6 L/100 km ... 50.0 mpg (Imp)


  4. #3
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    3,923
    Thanks
    1,982
    Thanked 1,109 Times in 640 Posts
    If anyone has any insights into the changes, or additional information about the changes please let me know so I can add it.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing
    Current project: Developing a rear sway bar alternative

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 41.7 mpg (US) ... 17.7 km/L ... 5.6 L/100 km ... 50.0 mpg (Imp)


  5. #4

  6. #5
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    3,923
    Thanks
    1,982
    Thanked 1,109 Times in 640 Posts
    Yep, I've been using Mitsu parts warehouse. Very useful!
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing
    Current project: Developing a rear sway bar alternative

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 41.7 mpg (US) ... 17.7 km/L ... 5.6 L/100 km ... 50.0 mpg (Imp)


  7. #6
    Administrator MetroMPG's Avatar
    Join Date
    Jan 2013
    Location
    1000 Islands, Ontario
    Country
    Canada
    Posts
    6,663
    Thanks
    2,177
    Thanked 1,857 Times in 1,136 Posts
    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)


  8. #7
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    3,923
    Thanks
    1,982
    Thanked 1,109 Times in 640 Posts
    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.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing
    Current project: Developing a rear sway bar alternative

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 41.7 mpg (US) ... 17.7 km/L ... 5.6 L/100 km ... 50.0 mpg (Imp)


  9. #8
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    3,923
    Thanks
    1,982
    Thanked 1,109 Times in 640 Posts
    Added the changes to the 2017 exhaust manifold.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing
    Current project: Developing a rear sway bar alternative

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 41.7 mpg (US) ... 17.7 km/L ... 5.6 L/100 km ... 50.0 mpg (Imp)


  10. #9
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    3,923
    Thanks
    1,982
    Thanked 1,109 Times in 640 Posts
    I've updated the 2017 engine mount info. I corrected an error I made.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing
    Current project: Developing a rear sway bar alternative

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 41.7 mpg (US) ... 17.7 km/L ... 5.6 L/100 km ... 50.0 mpg (Imp)


  11. #10
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    3,923
    Thanks
    1,982
    Thanked 1,109 Times in 640 Posts
    BIG update to the first post. 3dplane got us some amazing info on the 2017 engine updates which include:

    - Intake air temperature reduction guide. Supposedly helps fuel economy.
    - Exhaust manifold and catalytic converter updates.
    - New linear air fuel sensor. I never knew we had a wideband O2 sensor!
    - New roller camshaft. Intake only on manual trans. Intake and exhaust on CVT.
    - New piston top ring contact surface. It is now coated with DLC - diamond like carbon to reduce friction. Claim is 20% friction reduction.
    - Low friction timing chain. Claim is 20% friction reduction.


    Here are the images he provided:





















    Of course, I have some questions!

    On the converter image, it references MCC, FCC and UCC. What the heck are these acronyms?

    I never knew we had a wideband o2 sensor. That is super nifty. I assume the new part numbers ar simply for longer wire leads? But, why does the manual and CVT have different part numbers?!?

    I am curious as to why they added the colder air intake 'for fuel economy' when it seems warmer air gives better fuel economy...


    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing
    Current project: Developing a rear sway bar alternative

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 41.7 mpg (US) ... 17.7 km/L ... 5.6 L/100 km ... 50.0 mpg (Imp)


  12. The Following User Says Thank You to Daox For This Useful Post:

    MetroMPG (01-18-2018)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •