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Thread: Compression test on G54B

  1. #1

    Array
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    Join Date
    07-11-2021
    Posts
    17
    Location

    Quebec, Canada
    Vehicle

    1989 Dodge Power Ram 50
    Engine

    G54B

    Compression test on G54B

    Hi, Just did a compression test on my 89' 2.6 4x4 (g54b). Got 150(#1)-90-180-180, does anybody know if it is common to get low comp on #2 and could give me his 2cents on what would be the most probable cause. I've used a bore scope camera on #2 and it looks like there are metallic debris on the top of the piston. I'm planning to do a leak down test anyway before removing the head. Thanks y'all.

  2. #2


    Array
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    Join Date
    07-27-2011
    Posts
    259
    Location

    Nyssa, Or
    Vehicle

    1982 Dodge Power Ram 50
    Engine

    G54B
    At the current, sounds like you have a rebuild in your future regardless of what caused it; and a leak down test would be futile. The general rule of thumb that I was indoctrinated to was a maximum of 5 lbs. variance from highest to lowest cylinder.
    "There is no darkness only lack of light; There is no cold only lack of heat; There is no peace only lack of war." YODA

    Sometimes, it pays to be subtle, as a hammer to the forehead.

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