WK2 Water Fording - JeepForum.com
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post #1 of 13 Old 09-01-2017, 08:29 AM Thread Starter
over
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WK2 Water Fording

I'm in Houston and as you all know we recently went through Hurricane Harvey with flooding up to 9'+ in some surrounding areas. It was devastating.

I've been looking more and more into water fording for our WK2s and found some info, but still have some general questions.

Jeep advertises the water fording capability of Trail Rated jeeps (Grand Cherokee) up to 20". It also says the air intake is placed at 32", well above the 20" mark.

Does this mean, although not advised, that our WK2s can handle slightly more than 20" of water safely? What are the other limiting factors? Are the door seals all water-proofed the entire jam length, or only up to 20"?

Any insight would be appreciated.

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post #2 of 13 Old 09-01-2017, 08:33 AM
peep4444
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I do not know the answer but am curious to hear as well -- also, just wanted to say that I am glad to hear you are ok....
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post #3 of 13 Old 09-01-2017, 08:57 AM
ColdCase
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Dunno the answer, but I'm sure there is some margin. I think they test to 20 inches or so of slow moving water. If you have a lift or QL, you may be able to get a couple more inches.

There will be axle, transfer case, battery, and transmission vents that have check valves to prevent water backing up, but there is perhaps a low lying module that won't like being submerged.

Axle and transfer case fluid should be changed after fording. Also it is a slow drive fording deep water.

There is also a difference in short fording episodes and sitting in deep water for hours.
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post #4 of 13 Old 09-01-2017, 09:08 AM Thread Starter
over
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Quote:
Originally Posted by ColdCase View Post
Dunno the answer, but I'm sure there is some margin. I think they test to 20 inches or so. If you have a lift or QL, you may be able to get a couple more inches.

There will be axle, transfer case, and transmission vents that water can get into, and perhaps a low lying module that won't like being submerged. There is also the battery vent.

Axle and transfer case fluid should be changed after fording. Also it a slow drive fording deep water.

There is also a difference in short fording episodes and sitting in deep water for hours.
Good points. Thanks for that info.
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post #5 of 13 Old 09-01-2017, 12:39 PM
ecupip
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20" is the maximum depth rated. Meaning it must sit still in 20" of water for at least 30 minutes with no intrusion or component damage. Obviously you can drive through more than 20" without hydro-locking the engine, but other components could be damaged or take on water, plus if you have to stop in water higher than 20", it may enter the cabin.

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post #6 of 13 Old 09-17-2017, 01:05 PM
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This is some good info to know, as I live in a shore town, and it is prone to flooding when the conditions are right.
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post #7 of 13 Old 09-17-2017, 07:45 PM
Matt_H
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What about the exhaust being submerged? That can't be more than 20" high (haven't measured), and I can't imagine that having the exhaust submerged being a good thing - but this is not my area of expertise.


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post #8 of 13 Old 09-17-2017, 09:06 PM
ColdCase
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As long as the engine can blow the water out of the exhaust pipes and start, 20 inches of standing water is not an issue. Water in the intake is a different story.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #9 of 13 Old 09-18-2017, 05:53 AM
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Keep in mind too that when the vehicle is moving through 20-inches of water, it's creating a bow wave in front of the vehicle that is greater than 20-inches. If you're going to attempt water fording, make sure to take it nice and slow as opposed to just blasting through. To the OP, if you do any water fording, take pictures and let us all know how it goes!
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post #10 of 13 Old 09-19-2017, 11:46 PM
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There is a list of modifications if you want to go deeper. The Australians set them up for deeper water. OEM the first thing to go out in water is usually the starter motor.

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post #11 of 13 Old 09-21-2017, 05:56 AM
jeepjeepster
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Just don't go wide open throttle like 92% of the people do when driving through water.

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post #12 of 13 Old 10-02-2017, 12:03 PM
ColdCase
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By the way, the vent lines, including the battery, have a check valve to keep water from backing up into them. Dunno why I didn't mention that before

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
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post #13 of 13 Old 10-03-2017, 02:33 PM
Bryan98
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Quote:
Originally Posted by over View Post
I'm in Houston and as you all know we recently went through Hurricane Harvey with flooding up to 9'+ in some surrounding areas. It was devastating.

I've been looking more and more into water fording for our WK2s and found some info, but still have some general questions.

Jeep advertises the water fording capability of Trail Rated jeeps (Grand Cherokee) up to 20". It also says the air intake is placed at 32", well above the 20" mark.

Does this mean, although not advised, that our WK2s can handle slightly more than 20" of water safely? What are the other limiting factors? Are the door seals all water-proofed the entire jam length, or only up to 20"?

Any insight would be appreciated.

What's up fellow Houstonian! I have to say, the flood (and the constant threat of heavy rains producing minor flooding) played a role in my determination to get my JGC in a 4x4 model. I wasn't aiming for a Quadra-Lift, but it's nice to know I've got it in the event that I need it.
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