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Thread: 4D55T Piston Dimensions

  1. #1

    Array
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    Join Date
    10-13-2019
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    Location

    Victorville, CA
    Vehicle

    1983 Mitsubishi Mighty Max
    Engine

    4D55-T

    Question 4D55T Piston Dimensions

    I'm trying to order a cylinder sleeve and piston kit for my '83 Mightymax, but I can't seem to find what the piston dimensions are for the engine and the supplier won't ship it without that information, for obvious reasons.

  2. #2

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    07-16-2023
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    Location

    Southern California
    Vehicle

    1985 Mitsubishi Mighty Max
    Engine

    4D55-T
    If you are going that route with a company that doesn’t have your dimensions, then you need to take it out and measure everything. I would only buy from a place that knows your dimensions, or send them one of your pistons for them to measure.

    That said, I measured a few of the overall dimensions with some 12” calipers. I get OD of 3.570” (90.68mm) parallel with the pin, 3.585” (91.059mm). Perpendicular was a little larger, but I didn’t write it down.

    I am sure that you already solved your piston issue, and this is for anyone that finds this later.

  3. #3

    Array
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    Join Date
    05-23-2022
    Posts
    71
    Location

    tucson az
    Vehicle

    1986 Mitsubishi Mighty Max
    Engine

    4G61
    the original post was 5 years ago.. he hasnt been on here since a week after he posted so I dont think he will see this. but good info for future people.

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