so I submarined my JK

so I submarined my JK

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  1. #1
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    Default so I submarined my JK

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    darien99
    5 hours ago #1
    so I submarined my JK
    On Sat I was doing a water crossing which ended up being a little too deep when I got caught in a rut. Water entered the cab to a level halfway up the speaker grill. I turned off the engine and was able to get winched out, but sat in the water about 5 minutes. Water drained out of the cab, pulled the spark plugs which were dry. There was a little water in the intake though, the air filter was wet, and a smidge in the throttle body. A lot (I'd guess a gallon or two) came back out the tailpipe as things drained out.

    Cranked the engine over and it started, but transmission was stuck in limp mode (P R N D illuminated on dash) and engine light on. Started driving back out of the trail, got a quarter mile before stalling out. Got it started again, soldiered on, died a short bit later. Finally had someone pull me to the trail head (which was harrowing, for sure).

    Popped the hood and there was some milkshake blowby out of the intake. Had to run to town and get some oil, air filter, and oil filter and drained about 2 gallons!! of milkshake out of the engine. Engine seemed to run fine at that point, although there was a (new) engine rattle at startup that lasts about a second. Seems like a small bit of oil came out of the rear main, but no noticeable leaks from that after changing the oil.

    Ran in limp mode the 40 or so miles back to town. Trans temp held pretty steady at 170, engine temp pegged halfway or so on the gauge. The headlights freaked out for the first 10 minutes or so, turning on and off, hazards on and off, wiper occasionally turning itself on. Seemed to be better by the time I got back to town though.

    So here's where I'm at. I know I need to change the trans fluid, differential oil, and engine oil again. I'm also planning on pulling all the interior electrical connectors and spraying them with wd40 / dialectric grease to hopefully solve some of these electrical gremlins. My major concern at this point is the transmission which will not come out of limp mode, despite resetting the battery a number of times. I know these are electronically controlled, and there can be a number of things that can stick it into limp mode, so where should I start? I'd guess with the transmission computer which I understand is under hood attached to the wiper fluid res?

    Any and all suggestions are greatly appreciated. I am sure that this will eventually have to go to the dealer but I'd like to keep the costs as low as I can by doing what I can first.

  2. #2
    JK Super Freak resharp001's Avatar
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    My. Biggest. Fear.

    Sorry to hear that....hurt just reading it. Subscribed to see the suggestions and outcome.

  3. #3
    JK Jedi Master Mark Doiron's Avatar
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    Sorry to hear about this, Darien. I don't have a specific suggestion about your auto trans (I'm a lifetime manual driver), but you haven't mentioned the TIPM, yet. Control for pretty much everything electrical runs through it. Recommend that you pull it, clean up each of its seven connectors, and maybe use a bit of dielectric grease on them. Some folks say don't use the grease on the actual contacts because it is an insulator, which is true. However, if that grease causes electrical problems, then you didn't have a good mechanical connection for the contacts, so it needed repair anyway. Also, WD-40 is a conductor. Recommend you use an electrical contact cleaner instead. Also, check each of the fuses and relays in the TIPM, and if water entered there, pull all of them and clean it up. The TIPM lid does have a seal, but there are a couple other paths for water to flow up there.

  4. #4
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    Quote Originally Posted by Mark Doiron View Post
    Sorry to hear about this, Darien. I don't have a specific suggestion about your auto trans (I'm a lifetime manual driver), but you haven't mentioned the TIPM, yet. Control for pretty much everything electrical runs through it. Recommend that you pull it, clean up each of its seven connectors, and maybe use a bit of dielectric grease on them. Some folks say don't use the grease on the actual contacts because it is an insulator, which is true. However, if that grease causes electrical problems, then you didn't have a good mechanical connection for the contacts, so it needed repair anyway. Also, WD-40 is a conductor. Recommend you use an electrical contact cleaner instead. Also, check each of the fuses and relays in the TIPM, and if water entered there, pull all of them and clean it up. The TIPM lid does have a seal, but there are a couple other paths for water to flow up there.
    Thanks for the advice, Mark. I have a feeling that the TIPM is a lot of the issue, given the electrical problems I had driving it home. There's almost a certainty that some water made its way inside. I plan on pulling it out and giving it a shot with a can of compressed air (I don't have a compressor at my apartment) to blow out what I can for moisture. Is electrical contact cleaner ok to just spray into the fuse recesses?

    I also need to pull the dash and air the connectors for the HVAC, ect. Will use the contact cleaner on those as well if that's your recommendation.

  5. #5
    JK Jedi Master Mark Doiron's Avatar
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    Electrical contact cleaner should be fine. Read the warnings on the can, in case there's some word about plastics or such. But, it should evaporate almost immediately, so retained moisture shouldn't be an issue.

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