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How To Clean Water Jackets In Engine

Written By Thursday, December 2, 2021 Add Comment Edit
  1. SRT_DSTR15

    SRT_DSTR15 Well-Known Member

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    I have a friends car whose engine has been sitting for 7 years, in the car. Looks like it was never completely flushed before sitting and now there is probably some rust build up in the jackets. I wanted to hear opinions on filling engine with vinegar for a week and letting it sit and then flushing with water and washing baking soda to neutralize it all or any other better ideas before starting her up
  3. There is a over the counter engine flush that I used couple years age and it worked . It can be left in system for several days but I didn't . Caution: this stuff will kill grass in a heartbeat . I'd use it again . I paid a repair garage twice to flush my block and heater . Beats them every time .
  4. Sedanman

    Sedanman 67-9 Valiant specialist

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    I had the same issue with a motor once. I took the thermostat out and filled it with water and ran it at high and low rpm's then pulled the lower hose to drain it quick. It took 5 times or so to do mine before it stayed clear then I added straight antifreeze to mix with the water that was left in the block.
  5. Treblig

    Treblig Well-Known Member

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  6. pishta

    pishta I know I'm right....

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    stripped some wheels with pool acid, worked great but flash rusted in about 5 minutes. If you use it follow up with antifreeze ASAP. Vinegar would be safer over a week or molasses or any de-ruster on the market.
  7. Treblig

    Treblig Well-Known Member

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    A good friend of mine used vinegar on a 66 289, it had a lot of crap in the block (it was nasty!!). It took a few rinses with the vinegar (letting it sit in the block overnight). Make sure you "clean" rinse real good. After he got the majority of the corrosion/rust out of the jackets he sent it to the machine shop for overhaul. When he installed the engine and got it all hooked up he installed one of those clear tubes (with a screen) into the upper radiator hose. As the engine was running the tube/screen caught all the remaining junk, he removed and cleaned the screen every 2 weeks. He's had that tube/screen installed for about 2 months now and it no longer is catching anything so he plans to remove it pretty soon.
    Just get on Google and you'll find many explanations on how to use the vinegar....

    treblig

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    • SRT_DSTR15

      SRT_DSTR15 Well-Known Member

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      I guess no one reads my posts anymore... I'm trying to do this before starting the car. I appreciate the tips for when the car is running, but I would like to know what to do BEFORE starting the car
    • SRT_DSTR15

      SRT_DSTR15 Well-Known Member

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      Thats a good idea, I'll wait to see if there are any easier ones without having to remove freeze plugs
    • pishta

      pishta I know I'm right....

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      The water jacket taps are down low on the oil pan rail. you can open those (pipe plugs) and drain the block but they are pretty small and undoubtedly clogged with rust. Punch then through once you remove the plugs and coolant will run out. Run some motor flush and use these to drain.
    • SRT_DSTR15

      SRT_DSTR15 Well-Known Member

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      How do i run motor flush... If the car isn't running?
    • Several years ago, I was advised by a fellow car nut to use Borax. I don't even know if they make it any more. It used to be in the same section and laundry soap. I mixed it in hot water, poured it in the thermostat hole (all other plugs and holes blocked), let it sit for a while, opened side plugs and rinsed with hose under pressure through thermostat hole. I did that several times, and I got a BUNCH of stuff out of it.
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      • SRT_DSTR15

        SRT_DSTR15 Well-Known Member

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        The water pump was rusted stuck... The water pump passages in the block were blocked by rust... Let me know how I'm making a big deal out of a date coded rare engine for a numbwrs matching car
      • SRT_DSTR15

        SRT_DSTR15 Well-Known Member

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        After neglect the previous 20? Owner just wants to get car running to move. Engine turns over freely, not other issues seen.
      • jockeyshift

        jockeyshift FABO Gold Member FABO Gold Member

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        If the motor is in the car use the vinegar not strait but 30 % water let it set a couple of days. Drain flush with washing soda. You may have to change the hoses and freeze out plugs any how. Just flush well
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      How To Clean Water Jackets In Engine

      Source: https://www.forabodiesonly.com/mopar/threads/rusty-water-jackets-engine-sitting-for-7-years.374438/

      Posted by: goldmanyouss1951.blogspot.com

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