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  1. #1

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    best way to remove sand from sltx 1050 engine?

    ok, we have a 98 sltx 1050 engine that got swamped, we removed the intake and noticed a small amount of "grit" mixed in the oil in the block, we then removed the drain plugs on the bottom of the block, the water ran mostly clear with a hint of brown. my question is there a way to flush the remaining sand from the motor without disassembling the whole engine? and what to flush it with?

    thanks


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Honestly, the hint of brown color and sand alone would be enough for me to remove the engine and inspect the crank before moving forward.

    If any sand got inside the crank bearings, any type of "flush" wouldn't do the trick. Sand will destroy your bearings quick. Along with your pistons and rings.

    Remove the crank

    Spray the bearings with degreaser

    Blow the bearings out with compressed air (don't spin the bearings at 10,000 RPM with the air)

    Repeat until everything feels smooth.

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by lastride View Post
    ... "grit" mixed in the oil in the block, we then removed the drain plugs on the bottom of the block, the water ran mostly clear with a hint of brown...
    How long did the engine sit with water inside?

    Fresh or salt water?

  4. #4

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    it was fresh water, and it sat for about a day. we took the plugs out, rolled it over and spun the engine to get most of the water out it just took a while until we could get the engine out.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by lastride View Post
    it was fresh water, and it sat for about a day...
    Quote Originally Posted by xlint89 View Post
    Honestly, the hint of brown color and sand alone would be enough for me to remove the engine and inspect the crank before moving forward.

    If any sand got inside the crank bearings, any type of "flush" wouldn't do the trick. Sand will destroy your bearings quick. Along with your pistons and rings.

    Remove the crank...
    It seems unlikely that the engine will be serviceable for very long without pulling the crank shaft out and having it rebuilt with new bearings.

    At 6000+ RPM, those crank bearings need to have virtually zero rust and grit inside. Any roughness or damage to the bearings means that the bearings will fail fairly quickly, which could grenade the engine, risking breakage or bending of connecting rods and potentially the engine case.

    Pulling the engine apart to fully inspect and clean the bearings is advisable. The cost is mostly labor time. If the crank is actually still good, then the expense to seal it back up is modest.

    If the crank is not good, you will know where you stand in terms of repair options.

    Or you can just assume the crank is bad already and consider your rebuild options right now.

    BTW, was the engine still running when the water flooded it? If yes, there is the risk that a piston is cracked, or connecting rod bent from hydraulic lock (hydro-lock). Another reason to pull the engine apart for inspection.

  6. #6

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    no the ski was not running when it flooded. i just found out that the ski was actually being towed thought shallow water (ran out of gas) when it was flooded. i believe we will take your advice and just tear it down and rebuild it since it is already out of the ski and on the work bench.

    thank you for all your advice

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by lastride View Post
    ... I just found out that the ski was actually being towed thought shallow water (ran out of gas) when it was flooded...
    How fast was it being towed?

    For future reference, learn about clamping off the water cooling feed hose before towing, to avoid water getting forced into the engine from the exhaust system.

    Let us know what you find when you open the engine up. And we love photos

  8. #8
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    Sorry to hear

    If I found grit in the engine, it would come out for sure. you wont get any of the sand out of the case by flushing and having it come out thru the drain holes. theres 3 deep recesses for the crank and its in each one probably. not to mention swirling the sand around on the crank while flushing.

    you may not need new bearings, just do as xlint89 said and if still feeling mint, and no rust, then I would put it back in and give it whirl. see how it acts, bring a buddy with ya just in case.. got towing!

    install a on/off shut off valve in the intake hose then up to a strainer. tie wrap the valve always open, then if being towed, slip the tie wrap off and shut the valve and begin towing.

    just make sure everything is tight on the valve connection when installing.

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