Page 2 of 2 FirstFirst 12
Results 11 to 15 of 15

Thread: 3A92 Images (pics of disassembled Mirage 1.2L engine)

  1. #11
    Senior Member Cani Lupine's Avatar
    Join Date
    Aug 2013
    Location
    Bristow, VA
    Country
    United States
    Posts
    603
    Thanks
    20
    Thanked 205 Times in 110 Posts
    It's interesting to look at the carbon buildup in relation to the direction of the spark plugs. I wonder if indexing them in the direction of the exhaust valves would be best for keeping things clean.


        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage DE 1.2 manual: 49.2 mpg (US) ... 20.9 km/L ... 4.8 L/100 km ... 59.1 mpg (Imp)


  2. #12
    Member
    Join Date
    Mar 2016
    Location
    pennsylvania
    Country
    United States
    Posts
    73
    Thanks
    37
    Thanked 45 Times in 26 Posts
    The engine was replaced under warranty.
    I also have a complete list of measurements down to combustion chamber volume, I'll post up when I find it..

  3. The Following User Says Thank You to wilbur For This Useful Post:

    Daox (02-21-2017)

  4. #13
    Mitsubishi Fanatic Noopernipe's Avatar
    Join Date
    Aug 2014
    Location
    Wollongong, Australia
    Country
    Australia
    Posts
    53
    Thanks
    2
    Thanked 13 Times in 10 Posts
    Quote Originally Posted by Cani Lupine View Post
    It's interesting to look at the carbon buildup in relation to the direction of the spark plugs. I wonder if indexing them in the direction of the exhaust valves would be best for keeping things clean.
    The clean cylinder is only clean due to the blown head gasket. The coolant does a nice job of steam cleaning off the carbon build up. You can also do this at home with a large syringe of water, metered very slowly into the intake whilst holding the RPM above 3000; be very careful, you can hydraulic lock the engine if you get too keen!

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage LS 1.2 manual: 40.0 mpg (US) ... 17.0 km/L ... 5.9 L/100 km ... 48.1 mpg (Imp)


  5. #14
    Senior Member
    Join Date
    Mar 2020
    Location
    WI
    Country
    United States
    Posts
    376
    Thanks
    0
    Thanked 40 Times in 36 Posts
    Wilbur,
    . . . . I noticed the burning on the top of the cylinders where the head gasket was supposed to provide the seal. I also noticed the scuffing on the cylinder walls. The valves show no signs of burning. I am surprised by that considering that this engine had to be overheating. The owner was doing their oil changes as shown by the lack of sludge inside the oil passages and the top of the cylinder head. I tell people that maintaining the coolant system is just as important as changing the oil.
    GOD Bless and Thanks,
    rich!

  6. #15
    Senior Member
    Join Date
    Feb 2021
    Location
    Toronto
    Country
    Canada
    Posts
    178
    Thanks
    302
    Thanked 32 Times in 31 Posts
    Quote Originally Posted by Noopernipe View Post
    The clean cylinder is only clean due to the blown head gasket. The coolant does a nice job of steam cleaning off the carbon build up. You can also do this at home with a large syringe of water, metered very slowly into the intake whilst holding the RPM above 3000; be very careful, you can hydraulic lock the engine if you get too keen!
    Remember to inject your water after the air filter. otherwise you will just be soaking the paper filter.



Posting Permissions

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