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Thread: Cooling system: vacuum failure

  1. #26

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    1984 Mitsubishi Mighty Max
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    Head wise pay attention to the flush or protruding valve types. To replace the 55 with a nice roller 56 head I believe you need protruding valve (the head I pulled off mine was protruding valve so that's what I got for the 56 replacement)

  2. #27

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    Oh and try to find a good top end gasket kit that includes new injector nozzle gaskets (copper washers). Mine did not have them

  3. #28

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    Thanks for the info. Did some reading on the valves and injector sizes. Should be warm enough to get out and try and get it off to check valve type. Where did you order yours?

  4. #29

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    Will a harmonic balancer from a 56 work for the 55? Mine is chewed up. Can the key slot be repaired/replaced?

  5. #30

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    1991 Mitsubishi L200
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    Quote Originally Posted by gard View Post
    Will a harmonic balancer from a 56 work for the 55? Mine is chewed up. Can the key slot be repaired/replaced?
    it will fit, but there is like 12 different style balancers between the 4d55 and 4d56 lol.
    The most common one on the 4d55 is the really wide single vbelt, d56 never had this one

  6. #31

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    https://www.ebay.com/itm/HEAD-GASKET...-/253697957494
    Headgasket set i used with my 2 turbos and 30psi

    I replaced my injector copper. I think it came in that gasket set

    EDIT - they did, they are in the pic lol

  7. #32

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    I got mine off eBay. Pricey but the seller had a good listing that specified valve type and injector size with warnings about checking both because returns were not accepted for an incorrect order. Gave me a little confidence (warnings of getting Chinese junk parts through eBay made me wary) because they had experience with this head in particular. I did look up the seller but it looks like they are dormant.
    If you go with eBay just take your time and read everything, others here may have seller suggestions or other avenues entirely for a new head.

    For the balancer, I don't see why a 56 would not work on a 55 but I have not done this.
    Has anyone else?
    A machine shop might be able to repair it but I would call around if you want to try, I've never seen one get rebuilt only replaced.

  8. #33

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    Skullzaflare,
    Did you ever worry about head gasket thickness or is that only for the newer d56?

  9. #34

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    Quote Originally Posted by Bjamin View Post
    Skullzaflare,
    Did you ever worry about head gasket thickness or is that only for the newer d56?
    i try to stay thin, but i went to the gasket listed, which is a MLS gasket instead of a composite gasket

  10. #35

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    I made sure to go with a Multi Layer Steel gasket.
    I only asked because I watched a video the other day on doing a 56 head gasket and the guy had to measure the piston protrusion at TDC and pick the correct gasket thickness, I hadn't seen it mentioned anywhere else.

  11. #36

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    1984 Dodge Power Ram 50
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    I think I found the pulley. But it's a site that might be shady cause I've seen the page layout under multiple names. Also think I found it on amazon, gotta read more, but it looked like it.

    Really appreciate the help. Been pretty cold here (for Arkansas) hard to get much done since one outside working on it. Should have this off by the weekend if rain holds off. Then making my orders.

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