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Thread: Oil blow by through vale cover breather vent

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  1. #1



    Array
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    Join Date
    07-24-2012
    Posts
    2,363
    Location

    Washington State
    Vehicle

    1986 Mitsubishi Mighty Max
    Engine

    G63B
    Quote Originally Posted by Sgt Mitsu View Post
    I got a new jet valve and jet valve plug kit finally.

    Going to replace the working new jet valve just to see if it fixes the issue.

    The jet valve was burned at the combusion end and not sealing the passage off.

    I'm going to wait and install the plugs at an engine rebuild I plan on doing soon.

    Still driving it and it runs fine just have to empty the catch bottle i made every time i do drive it.

    Wish me luck.

    how is the pcv valve?

    If your getting that much oil through to a catch can then your sucking oil from the valve cover I would think. Catch cans can also catch residual water in engine also. How is your catch can conected. Valve guide seals could be another cheaper fix if oil is seaping into chambers. Bottom line would be to do a compression check also. Check and make sure your compression isn't under spec too far between cylinders.

  2. #2

    Array
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    Offline
    Join Date
    04-20-2014
    Posts
    22
    Location

    Tampa Florida
    Vehicle

    1987 Mitsubishi Mighty Max
    Engine

    G54B
    I removed all of the jet valve rocker arm adjusters effectively disabling the jet air valves and plugged up the one I found originally broken
    and no more oil blowing out the valve cover breather filter. Now it runs great and all is good. Have a new long block engine on the way and other new goodies to upgrade the suspension with Montera uppers so I can fit some new 31's or 32's.

    Some body work and new paint is in order now. I also have a new tranny and transfer case,stock, and the read dif w/ matching gear set.

    It's almost ready to pull my Gyrocopter to the airport.

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