How to kill an XJ in one easy step!

Black Dog

Makin' Beer.
This is the definitive guide to taking a perfectly good XJ and sending it to jeep heaven:

Step one (the only step): Drive it into a creek that is way to deep and hydrolock the engine.

Yes, I've finally done it. Let me tell you a long story..... My inlaws got here on Friday afternoon, and that evening we went to a little Mom 'n Pop diner down the highway for dinner. My wifes parents drove their truck and then came straight home to go to bed early, and me and my wife and her sister and niece took my Cherokee so that we could go do a little site seeing on the way home. So we went up this road with a couple creek crossings that I've driven probably 10 times already this spring, and each time the water was progressively higher and I made it through just fine. On this day the water was especially high, and I let my big fat ego take control and decided to show off a bit. We made it most of the way though, but then the jeep just stopped and the engine was dead. My wife asked would to do now and I just said "Everybody out!". They didn't believe me at first but then realized I meant it. The water was piling up on the drivers side so we had to get out on the passenger side. I'm about 5'5" and the water was crotch deep on me, running fast and real cold. My wife's niece is only 14 years old and she doesn't weigh too much and I was a little worried she might get swept off her feet, so I bear hugged her and got her up onto shore. Everybody made it out fine luckily!

There is a piece of property for sale right near there with a bunch of dead vehicles and old buildings, so I ran up there to see if anyone was there for help but the place was abandoned. I managed to find a come along on a trailer but the cable was only a couple feet long so it was useless to us, and the next nearest house was about a mile walk back up the road so we started heading out. The bad thing about living in a rural area like we do is that there aren't too many local services, and I couldn't get a hold of the local wrecker, so the guy who's phone I was using gave us a ride into town and we are really grateful for that. Finally on Saturday morning I got a hold of the tow truck and we went out there and pulled my jeep out of the creek and back home.

The engine is totally dead. When we first got it out of the water I tried starting it and I could hear the starter engage but the engine wouldn't turn over. The battery is gone too, there isn't even enough juice to run the electric locks. The bill for the tow truck was a mere $150 which is a fraction of what I thought it would be, and the driver has a sense of humor. The place where I got it stuck is called Swamp Creek, so in the remarks section of the bill he wrote "Jeep swamped in Swamp Creek". Joke funny ha ha! So I got all the water scooped out but each time I would go outside and look there was more water in it coming from somewhere, I assume it is draining out of the seats or something. I think the interior is completely ruined, so I'm going to strip out all the carpet and get some truck bed liner instead, and maybe add a few drain plugs.

As far as the engine goes, I'm going to try and salvage it if I can. I know I'm going to have to drain and replace all the fluids (engine, tranny, transfer case, diffs, brakes, etc, etc) and give the battery a good charging, and probably take the cylinder head off and clear water out of there. I'll do that and see if it will at least start or turn over for me, I'm hoping I don't have bent\broken rods or anything else. If I do have to pluck out the engine and transmission though what I'd like to do is make it the way it should have been. I'd really like to change out the AW4 for an AX15 and then build a 4.6 stroker, but we'll have to see if the budget will allow that. The tow truck driver thinks I should do a small block V8 in it.

I'm actually not that heart broken that I killed my best mechanical friend. I honestly would have rather ruined it the way that I did than to have it wrecked in busy city traffic or totaled in a hit and run like my old 95 XJ was a few years ago. Seizing an engine while you are fording a creek is a dignified and honorable way for a Jeep to meet its maker. If anyone has any other tips (other than getting a snorkel next time!) for fixing it I'm all ears. My sister inlaw did get a few cell phone photos and emailed them to my wife, so I'll post them here in a few days.
 

Root Moose

Expedition Leader
Did you clear the hydrolock? Maybe I missed it.

Pull the spark plugs.

Crank the engine on the starter.

Stand clear - water will be coming out of the engine.

Change oil.



Try to start. If it runs, only run it a moment - how long depends on how adventurous you are.

Change oil.

Check oil - Run engine a few minutes at idle. Check oil. If it looks fine drive it a few miles and then re-inspect.

You should never try to start a hydrolocked engine. You can break the engine that way.
 

Black Dog

Makin' Beer.
I haven't cleared anything except for the lake in the interior. When I tried starting it after we pulled it out I only turned the key for long enough to realize nothing was happening so only about a half a second. I've definitely got a summer project now, but if it is realistically possible I'd like to have it fixed by the weekend after the 4th of July because thats when my parents are here and I've got a road up a mountain I want to take them on. If it can't be done that soon then that excursion will just have to wait until next time.

I freaking love my XJ, I've punished it so hard and until just now it has never let me down. And really the jeep didn't let me down, it was entirely user error on my part that got me into trouble.

Here are the pictures we got. Looking at the pictures it doesn't look so bad but it really was.

IMG00364.jpg


IMG00359.jpg
 

stolenheron

Explorer
damn, it sucks to hear that.

people hydrolock motors all the time down here in S. FL, but generally its nasty muddy water not flowing creek water.

that isnt that deep, but it looks like a very strong flow. did it just push its way into your intake? or were you putting up a good bowwave when you were still moving through it?

definitely pull plugs and drop the oil. i'd do everything you can to save what you have before trying on something new.

best of luck to you!
 

Black Dog

Makin' Beer.
that isnt that deep, but it looks like a very strong flow. did it just push its way into your intake? or were you putting up a good bowwave when you were still moving through it?

I did get the wave going but I think it was just a little too much. I'm about 99% positive it was water that came up from underneath because I've got the K&N FIPK with the open element cone style air filter which is a bad thing for an expedition style rig that you actually plan on using for what it is built for.

I'd really like to do a stroker rebuild, but I also don't want to have to pull the engine out so I'm hoping it is as easy as just clearing the cylinders and changing the fluids 2 or 3 times.
 

Momrocks

Adventurer
Rust takes hold of internals in no time flat. Replace the oil, pull the plugs and crank it over until compression pushes out the water. You should be able to tell by the sound of it spinning whether you've bent or broken a connecting rod. Liberally douse the cylinders with WD-40 and crank for a second or two. This should keep some of the immidiate rusting at bay until you can drop the pan and pull the head for a full damage assessment.

Sorry to hear about your luck.
 

jeepdreamer

Expedition Leader
Unsinkable and unkillable...

Mine was easy to kill.. Drove it over a 100k with a slow rear main seal leak...just kept tabs on the oil level and all was fine. The "EX" asked to borrow it a few days while her's was in the shop. I Explained and fussed about it being a REQUIREMENT to check the oil every other day. She agreed and I even showed her how.
Yup....three days later she calls to say the D@M# Jeep died and it was my fault she was stranded. 3 years, 100k miles, never ever a hickup...yeah. MY FAULT! :violent-smiley-031:
 

BIGdaddy

Expedition Leader
4.0l's are known for being able to be salvaged. dry that sucker out and drain the fluids two or three times.

and then put a snorkel on. :D

lots of guys over on naxja, who've hydro'd a motor, only to have it cleaned/dried out and run another 100k, before being rebuilt at a normal interval. (200-300k)
 

stolenheron

Explorer
damn, an open cone filter is a killer no doubt. if i was in a desert, i'd run one, if there is a remote chance of a puddle i wont go near one.

i know several friends with "tuner" cars that have hydrolocked motors on city streets because the cars are so low, as are the intakes on the vehicles, they hit a puddle or had to drive down a small flooded street and that was that....
 

BIGdaddy

Expedition Leader
Looking at those pics again, I'm putting money on not finding any water in the engine. I'm gonna bet that a low-slung alternator is the culprit. I just don't see any way of a giant, engine-stalling amount of water being able to get up there from the looking at those pics.
 

Lewybrewing

Observer
But from my understanding of the story the Jeep was left in the creek overnight, correct? I can't see water getting to far in the engine after looking at those pics...but the time exposed might be a problem.
 

The Adam Blaster

Expedition Leader
I've had water in my engine a couple of times now.
You really need to change the oil ASAP - I always did right on the trail after dragging it out of whatever water hole I was foolish enough to plunge into. Then I bought a snorkel and life is good. :D

And Bigdaddy has a point, you might have a dead alternator, especially the way you describe the totally dead battery. It's possible you just happened to have REALLY bad timing - your alternator had stopped charging your battery about 30-45 minutes before this happened, and your battery was totally drained just as you were 1/2 way through that creek.

Remember, the power of the battery is independent of whether the engine is running or not.
 

Payback

Wannabe
Looking at those pics again, I'm putting money on not finding any water in the engine. I'm gonna bet that a low-slung alternator is the culprit. I just don't see any way of a giant, engine-stalling amount of water being able to get up there from the looking at those pics.

Even if he did destroy his alternator, wouldn't he have had enough battery juice to make it across the creek?

How much water do you need to suck up before you hydrolock? It's not THAT much is it? Just a few cups at the right moment?
 

DrMoab

Explorer
I have a perfectly good 4.0L out of a wreck I bought. Its a 2000. Shoot me a PM, maybe we can work out a deal. :D
 

Black Dog

Makin' Beer.
I replaced the alternator about a year and a half ago but it was a refurb and I've never ever had luck with that kind of stuff. This evening I'm going to push it into my garage so I have somewhere dry and clean to work on it. I won't need to drop the pan on the transmission will I? I'm hoping that as long as I can circulate a couple changes of clean fluids through that it will be ok, I'm scared of working on a transmission.

I've been wanting to do a homebrew snorkel for a while, my plan was to find a stock or slightly smaller air box and try and position it inside in a way that I could fit a second battery in the future. For the time being the K&N works, I will just remember not to ford any more creeks.:snorkel:
 

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