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Thread: Compression check

  1. #1

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    12-04-2014
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    Lytle, Texas
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    1985 Mitsubishi Mighty Max
    Engine

    G54B

    Compression check

    Hello from South Texas. Does anyone know what the PSI range is for compression checks? Just picked up a 85 4x4 MM in a trade and need to start evaluating what I have to work with. Any help appreciated.

  2. #2

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    04-06-2011
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    Jacksonville, FL
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    1990 Mitsubishi Mighty Max
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    G54B-T
    looks like 140 psi
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  3. #3

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    Lytle, Texas
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    1985 Mitsubishi Mighty Max
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    G54B
    Funny there isn't a plus or minus associated with that, most others have a 14 psi variance. Go figure. Thanks for the help.

  4. #4

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    09-26-2014
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    1993 Dodge Ram 50
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    4G64
    First,
    Welcome Sir !!!!

    Second,
    May I ask for an bit more info? Specifically, Your Engine hot & cold compression readings?

  5. #5

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    Lytle, Texas
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    1985 Mitsubishi Mighty Max
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    G54B
    Thank you for the welcome. I don't have any compression readings yet, armature is bad on the starter. I can only get about one and one half turns on the engine before it spins out. More to follow as soon as thats fixed.

  6. #6

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    Jacksonville, FL
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    1990 Mitsubishi Mighty Max
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    G54B-T
    Compression is bound to be low on an old motor. The thing to look for is a big difference between cylinders.

    Make sure your cooling system is adequate because overheating these engines usually leads to cracked heads.

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