Freeing a 440 block

Engine, Trans & Driveline

  1. towtruckAl

    towtruckAl Well-Known Member

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    yes I use liquid wrench in my shop didnt know its composition, it works . thanks
     
  2. Ski 61701

    Ski 61701 Well-Known Member

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    If its the cylinders that are rusty due to stuck rings, I wonder what evapo rust would do if poured in the cylinders?
     
  3. khryslerkid

    khryslerkid FBBO Gold Member FBBO Gold Member

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    You went through all that work to get that engine out of that RV for a locked up engine? Hope it breaks loose for you without any issues.
     
  4. dla4567

    dla4567 FBBO Gold Member FBBO Gold Member

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    Why not just tear the engine down and hammer the pistons out?
     
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    • wyrmrider

      wyrmrider Well-Known Member

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      you do not want to gouge the cylinder walls
       
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      • mentor70

        mentor70 Well-Known Member

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        i freed up a ford 302 by poring Evap O Rust on the cylinders.

        i let it set over night, and was rolling it over in the morning
         
      • wyrmrider

        wyrmrider Well-Known Member

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        is evap o rust acid?
         
      • moes

        moes Well-Known Member

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        Evapo-Rust® rust remover is safe on skin and all materials except rust! It's also biodegradable and earth-friendly. Water soluble and pH-neutral, Evapo-Rust® is non-toxic, non-corrosive, non-flammable, and contains no acids, bases, or solvents. Evapo-Rust® is simply the safest rust remover
         
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        • threewood

          threewood FBBO Gold Member FBBO Gold Member

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          The stuff is pure witchcraft, it's amazing.
           
        • Fran Blacker

          Fran Blacker FBBO Gold Member FBBO Gold Member

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          After evapo-rust sits if its not loose pick a cylinder that's almost halfway down the bore. 4x4 piece of wood in cylinder hammer time, size as large as necessary .
           
        • wyrmrider

          wyrmrider Well-Known Member

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          Thanks for the tip on evaporust
           
        • BeeKool

          BeeKool Well-Known Member

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          I've heard orange juice mixed with #1 diesel.
          Never tried it though.
          What about PB Blaster?
           
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          • moper

            moper Well-Known Member

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            It's already a core. Put it on the stand, pull the heads and strip it, beat the pistons out of it, and appraise whats left. Otherwise you're just wasting money and time to spend on a complete re build anyway.
             
          • 91r/t

            91r/t FBBO Gold Member FBBO Gold Member

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            Mixture of PB Blaster, ATF, and Marvel Mystery and my stuck 383 was free'd up. Poured it in the cylinders 4 at a time on an engine stand so the motor could be set up parallel with the ground to fill all the cylinders. This motor was STUCK too!!! Worked good. Took a 2x4 and tapped the pistons out one by one. Block ended up being cracked, but i did not know this until all the pistons were free. Good experiment if anything else.
            :thumbsup:
             
          • m79ded

            m79ded Well-Known Member

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            I had a similar situation and tried sea foam and MMO and that didn't do the job. I ended using a very dull bit on an air chisel on the top of the pistons (Pistons were scrap anyways) and the vibrations loosened it up. I don't know if it was pure luck or co-incidence but it worked. Not to hijack this thread but somewhere along the same lines and to also help out , what would y'all recommend for stuck rings? I tried MMO and Sea foam in the cylinders and that didn't for. I did see a lot of mention of ATF and acetone like liquid wrench. Or should I just go put ATF acetone and whatever other voodoo you would recommend individually. Thanks very much
             
          • XCELLR8

            XCELLR8 Well-Known Member

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            I have used white vinegar with good results getting rust removed. It dissolves the rust. I was shocked the first time I used it.
             
            • Thanks! Thanks! x 1
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