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Thread: New to me 4D55

  1. #1


    Array
    Status
    Offline
    Join Date
    07-27-2011
    Posts
    255
    Location

    Nyssa, Or
    Vehicle

    1982 Dodge Power Ram 50
    Engine

    G54B

    New to me 4D55

    Just received new to me 1983 D-50 with 4D55 last weekend plan on dropping into the GW. Previous owner had it sitting for a few years before installing 56 head with roller rockers now it will not run.

    Questions:

    1. Is a D56 cam "Required" since it has roller rockers. Can I use D55 stock cam or do I have to have it reground for roller use.

    2. Is the barring kit "Required" to set injection pump timing. I know it is always recommended but do I really NEED it..

    3. Will spill port timing work with this motor and injection pump.

  2. #2

    Array
    Status
    Offline
    Join Date
    01-18-2015
    Posts
    215
    Location

    Inwood WV
    Vehicle

    1991 Mitsubishi L200
    Engine

    4D56-T
    normally you want a roller cam for roller rockers, as the cam profile is easier on the wheels, slippers and jump.
    not having the tool to set the timing can melt cylinders, i have heard you can go by the tone of the knock to get it close, however i have not touched timing

    if he had the injection pump off (obviously) you will probably need to bleed the injection lines

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