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Thread: M923A1 Problems after deep fording

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    Default M923A1 Problems after deep fording

    Ok guys we were hit pretty hard in the Southeast Texas area with Tropical Storm Imelda. When the storm hit I used my A1 to do some emergency rescues due to flooding in our area. It did good all day until we had to go in some water about 48" deep a little over the air filter canister under the truck.

    The rescue took over an hour due to the young kids and mother could not swim. In the time we were getting the family loaded up the truck choked down and died. I had to end up removing the rubber boot from the intake to get the truck started back up. after the truck was back running I noticed it was smoking (white smoke) very bad. I was able to get the family to dry ground and drive the truck approximately 6 miles back home. when I was pulling up to the house I noticed the temp gauge creeping up to around 230 degrees. after the truck cooled down I pulled the coolant container cap and started the engine and coolant was pushed out of the container when the engine was running. I did also notice a little white milky in the oil. Is it possible that I blew a head gasket are do yall think something else could be wrong?

    About a month ago I pulled the air canister and replaced the filter and o ring gasket for the canister halves. when I put it back together I siliconed the halves together to prevent leaking if I had to go in deeper water. Not sure how the water got in there I don't know if maybe one of the rubber boots is possibly cracked or not but it got water in somehow.
    Last edited by Tinstar; 09-29-2019 at 20:52. Reason: Readability

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    4 Star General sandcobra164's Avatar
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    It is possible that you lifted a head gasket. You need to do a pressure test on the cooling system to see if it's leaking down but if it's pushing the coolant out of the tank when running and getting hot, not good. Diesels run very small combustion chambers so if it "did" ingest water it may also have more problems. Does it run well with no abnormal noises? I'd pull the heads, check the tops of the pistons and even measure their "top height" at TDC to ensure I didn't have a bent connecting rod. If they measure the same, you can rule out bottom end damage, perhaps.
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    Yes motor starts right up and runs fine with no internal abnormal noise. The truck wasn't that hot for very long so I am hoping nothing is hurt in the bottom end. I will pull the heads and check from there. If there is more damage do you have any idea what a total rebuild cost?

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    Colonel Ue413's Avatar
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    Out of curiosity, when you start and run the truck now, does it still blow excessive smoke out the exhaust, or was that only after it died and you restarted it in the 4 foot flood water?
    If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month.





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    I'm the dude, man! Steel Soldiers Vendor simp5782's Avatar
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    In frame rebuild is around $1100 for a kit. Plus other odd ends like if you need a head or 3 of them. Or head bolts. Etc.

    Or you might be able to find a take out NHC250 for under $1000
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    If you got anything over a few drops of water in
    there I would try to take a look at the con rods.
    ( bore scope or a good visual look with the pan off)
    because that would be the only thing that could
    give. But you might be lucky and just change the
    head gasket.
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    Yes if I start truck now it still blows excessive white smoke.

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    A jon boat is cheaper compared to rebuilding your engine after it took on water.

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    Quote Originally Posted by bachman502 View Post
    A jon boat is cheaper compared to rebuilding your engine after it took on water.
    I understand that but had to use what we had in the situation.

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    Agreed, lives are worth more than an engine.
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