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Old 04-22-2013, 01:00 PM   #1
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How deep?

Last week in the Chicago area we had huge rains leaving many streets two or more feet deep in standing water. As a first time Jeep owner, that got me excited. But, I really didn't want to push it too much.

How deep of water have you taken your stock JK or JKU? I'm asking because the info I have read (33") puts the water above the exhaust. I always heard that water must be below the exhaust or the back flow will cause the engine to seize up and crack the block. What's the story? If it matters, its a Sierra not a Rubi.

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Old 04-22-2013, 01:13 PM   #2
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Water can be above the exhaust. As long as the Jeep is running, it's not getting in to anything important.

The official limit, according to Jeep, is 30 inches regardless of model.

The larger concern is not plowing in to a deep puddle and creating a huge wave over your hood - that's a good way to suck in some water.

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Old 04-22-2013, 01:15 PM   #3
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Sahara.

Water can go past the exhaust, just dont turn the vehicle off/on while its under.
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Old 04-22-2013, 01:17 PM   #4
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30 inches is the official limit from Jeep.

The hightest I've gone through (I'm stock, breather tubes are not extended) is about 18 inches (up to the Sahara sidesteps) for quite a distance. That was last week during all of the flooding.
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Old 04-22-2013, 01:19 PM   #5
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Sahara.

Water can go past the exhaust, just dont turn the vehicle off/on while its under.
And someone correct me if I'm wrong but I believe the problems start if water gets up to the dash where it can interfere with electronics?

Technically anything below the dash is doable.

Ill let others chime in and let me know if this is incorrect.
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Old 04-22-2013, 01:19 PM   #6
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And don't drive through flooded streets if its an overpass covered in 30" of water. That can push your jeep off the road into deeper water. That is why I'm sure more folks drown on flooded streets than crossing creeks in jeeps. But that's just an opinion.
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Old 04-22-2013, 01:23 PM   #7
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And someone correct me if I'm wrong but I believe the problems start if water gets up to the dash where it can interfere with electronics?

Technically anything below the dash is doable.

Ill let others chime in and let me know if this is incorrect.
The air intake is a bigger concern before water is getting up to your dash. Any considerable amount of water through the intake could be a huge problem in the way of a hydro-locked engine.
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Old 04-22-2013, 01:26 PM   #8
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The air intake is a bigger concern before water is getting up to your dash. Any considerable amount of water through the intake could be a huge problem in the way of a hydro-locked engine.
Agreed. I've heard that for the deep stuff, in addition to a snorkel, you have to start waterproofing electronics. Wasn't sure exactly what that referred to. I figured if the water is below the dash, it's below the intake. That was all I meant.
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Old 04-22-2013, 01:34 PM   #9
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I suppose we can now start entertaining sump pumps for our Jeeps? There's probably already some out there for the submariners. Then Jeep wetsuits and Jeep scuba gear (for the serious water crossing).

I went through 24"-30" last week in flooded Kendall County (far outskirts of Chicagoland). Just slow and steady even if it's just 12" else, like others said, you might chuck enough water up into the intake and hydro lock it.
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Old 04-22-2013, 02:18 PM   #10
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And don't drive through flooded streets if its an overpass covered in 30" of water. That can push your jeep off the road into deeper water. That is why I'm sure more folks drown on flooded streets than crossing creeks in jeeps. But that's just an opinion.
Correct! It's not the depth of the water it's the flow. If the water is flowing fast enough you'll get swept away in much less than 30" of water whether your driving a SmarCar or an up-armored Humvee And if a tree or some other object gets swept up against your tires, forget about it. Stay the hell out of water unless absolutely necessary.
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Old 04-22-2013, 02:47 PM   #11
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I suppose we can now start entertaining sump pumps for our Jeeps? There's probably already some out there for the submariners. Then Jeep wetsuits and Jeep scuba gear (for the serious water crossing).

I went through 24"-30" last week in flooded Kendall County (far outskirts of Chicagoland). Just slow and steady even if it's just 12" else, like others said, you might chuck enough water up into the intake and hydro lock it.
I live right by where Kendall, Kane, Dupage, and Will meet (near where Aurora, Naperville, Plainfield and Oswego meet). Yeah...there was some pretty good flooding going on.
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Old 04-28-2013, 09:22 PM   #12
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I live right by where Kendall, Kane, Dupage, and Will meet (near where Aurora, Naperville, Plainfield and Oswego meet). Yeah...there was some pretty good flooding going on.
Sure was fun. I took extra time coming home from work, just finding stuff to drive in
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Old 04-28-2013, 09:26 PM   #13
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Good info here that I had no clue on
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Old 04-28-2013, 09:51 PM   #14
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Note: on my 2013, stock breather tubes for the front dif end at the top of shock tower, so unless they have been extended don't go higher than that.

Also hot axles meeting cool water can suck water past the seals even if you don't go above the breather tubes, After going through water above your axles it's a good idea to check your oils and make sure they haven't gotten water logged, become milky.
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Old 04-28-2013, 10:02 PM   #15
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