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Hydrolocked my engine with dealer plates still on...

64861 Views 196 Replies 63 Participants Last post by  little_Jeep
So here's my story. I was out playing around in puddles...really nothing big at all. On my way out I made one final run, a little water splashed on the hook and the engine died. I still have the dealer plates on her and they towed me, after my friends got me out of the water, to the dealership. I've read some of the threads and seen some people say that it was covered by Jeep for the repairs. I have a video of my final death run and it shows I was not exceeding the limits of "the most capable offroad vehicle". She's a stock JK Rubi and can climb anything I point her at...water seems to be an issue. I would love to hear any thoughts on this, what it could be, best wat to prevent it (what is the best snorkel?) and if anyone has had this happen and had it covered by warranty I'd really love to hear from you so I can have a little ammo when I go in to fight them.
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If it wasn't an accident than what was it? You could call it stupid I guess but like I said I'm sure it wasn't his intent to trash his engine. Most accidents on the roads are caused when someone does something "stupid". In this case the act of stupidity only damaged his vehicle.:thumbsup:
Lack of common sense which is "stupid" in simple terms.
For those that think I'm hiding something or misrepresenting the facts, I am in the process of posting the video to youtube and a link will be provided. You will clearly see that I avoid romping through an area with large ruts, I am clearly not slamming on the gas and that the water really was not that deep. After you see the video I will be happy to hear the few that are up in arms that a Wrangler should not be used for this purpose tell me they would not attempt the same thing. At that point they should delete their forum accounts because they have soccer-mom-mobiles...not Jeeps. No offense meant to anyone expect those that are too afraid to have a little fun in their toy. If you want a vehicle get a hybrid...I have a toy that also gets me to work.
For all to see....Drum Roll...here's the video...

YouTube - P1030034
Way to fast on entry and again into the deeper portion. When the nose is pointed down is not when you want to be going fast. Once youre in deep though, you can gas it a bit to make it through.
I've gone WAY deeper and 2x as fast... That doesn't look like it was more than 5"-10" deep. It also doesn't appear that much if any water at all was passing over the right side of the hood.

I am starting to wonder if you filled the air-box up with water in your previous 4-5 passes and that run just tipped it over the edge.

When I was washing the mud out of my air box last month I realized that once it fills up with water it takes a good minute+ to drain out.

I can see how a few good passes could fill up your air box to the top with water then you are only one good bounce away from gulping a 1/2 gallon of water down the intake. At least thats my best guess as to what happened.
When the manual says don't go in water above the hubs, that means no splashing. What happened is the water splashed on the inside of the hood, moved to the intake and filled up the airbox, saturating the filter, water in the intake. I've been through water five times as deep as that crossing in my TJ. The trick is not to splash it into the intake.
So, this one time in band camp, I went about 35 MPH through 1.5 ft of raging flood water. It was so deep and fast (that's what she said) that it actually broke the front clip on my fender, basically ripping the front of the fender off. I'm really surprised this engine ingested water.
wow, I cant believe you actually swamped the intake with that little run.....Looks like there is hardly any water even splashing near the intake. I have also been through water much faster then that and deeper.

One question... I heard you try to start the jeep afterwards and it sounded like the starter was still able to spin the crank.....With a hydrolocked engine I would assume that the engine would lock up completely...right?
With a hydrolocked engine I would assume that the engine would lock up completely...right?
I was thinking the same thing but haven't googled "hydro-locked" yet to see what all it entails.
So, this one time in band camp, I went about 35 MPH through 1.5 ft of raging flood water. It was so deep and fast (that's what she said) that it actually broke the front clip on my fender, basically ripping the front of the fender off. I'm really surprised this engine ingested water.
Yup, according to this, the engine should be locked up:

Hydrolock - Wikipedia, the free encyclopedia
Hydro-Locked is when an engine ingests enough liquid that it seizes up because it is impossible to compress a liquid.

However, if an engine ingests just enough water to damage it (Bent connecting rod) but not completely lock it up... say 2-3 oz in any one cylinder it can do massive damage as it causes an over pressure. Engines are typically 9.5 /1 but with a few ounces of liquid the compression is now 40/1 - 100/1 or higher. So although it didn't Hydro-Lock it will bend connecting rods, damage valves and Head Gaskets.

If you think about how many ounces of water it takes to damage an engine... its not much.

That said it still didn't look like he took much water on that pass & I still think that this was the result of multiple passes.
However, if an engine ingests just enough water to damage it (Bent connecting rod) but not completely lock it up... say 2-3 oz in any one cylinder it can do massive damage as it causes an over pressure.
If the engine bent a connecting rod, wouldn't the engine be completely locked up? That takes A LOT of force to bend one of them there things.

Engines are typically 9.5 /1.
The Jeep is 9.6:1 from what I've read. I'm not trying to argue or say "you're wrong". Just FYI, I just happen to read it the other day...
When mine hydrolocked there was a large hole in the side of the engine block. From the hydro locking a cylinder and causing the rod to rape and molest the block.
If the engine bent a connecting rod, wouldn't the engine be completely locked up? That takes A LOT of force to bend one of them there things.

The Jeep is 9.6:1 from what I've read. I'm not trying to argue or say "you're wrong". Just FYI, I just happen to read it the other day...
9.5:1 was just a generalization and a good guess, I guess. No offense taken. :)

If you bend 1 rod or pin even .025 - .050" it will either knock like hell or just not run But it won't be necessarily be 100% locked up. Its still trashed for sure.

I used to drive and work on a Turbo Charged Baja's, Sand Rails, etc... I've seen just about every possible way to hand grenade a motor. :rofl:
wow, I cant believe you actually swamped the intake with that little run.....Looks like there is hardly any water even splashing near the intake. I have also been through water much faster then that and deeper.

One question... I heard you try to start the jeep afterwards and it sounded like the starter was still able to spin the crank.....With a hydrolocked engine I would assume that the engine would lock up completely...right?
It's actually very clear that pass was enough to hydrolock the engine. Do you see the constant stream or roostertail of water to the passenger side of the Jeep going as high as the roofline?

Does water only go to the outside of the fenderwell when a tire hits it at speed? No, it spreads in an equal V pattern. Now look again closely at how much water is being thrown outside of the fenderwell. It's pretty safe to assume the same amount of water is being thrown to the inside of the tires directly on the engine, intake, and hood. The hood serves as a good water deflector to redirect the water directly into the air intake horn.
Wow, that's so incredibly specifically vague, I almost completely kind of really don't understand it.
:laugh: Thanks for the new signature!!
Hmmm. Man, this just really sucks! I just can't beleive that this HYDROLOCKED it though!? I, like many others have said, have done the same and more in my TJ and JK. Are you sure that it's destroyed? It's not something simple as a clogged air filter, or wet ignition? I have seen both of those stop a vehicle the same way and prevent it from starting untill the filter is changed or the electrics have a chance to dry out. Where did you find out that the engine is destroyed? Is the block cracked? Thrown rod? Horrible self eating noises when trying to crank? Does it even try to crank now? I just can't fathom this, at all. I would hazzard that on a run like that, repeatedly, that it is something electric. Have you had the vehicle the whole time, or have not seen it since it happened?

I guess I am not trying to QUESTION you, as much as I am asking questions out of my own disbelief! Sorry to see and hear that man.

On a side note, and as a good example (unfortunately), if you are ever in a situation like this, and your engine dies. DO NOT ATTEMPT TO RESTART IT!!!! Safety situations not withstanding of course. You are better off being towed out and to start diagnosing the issue first. It could be as simple as pulling the plugs, blowing out water, re-installing and fluid changes. Sorry to see this though.
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You can definitely tell by the speed that you'd be kicking up a ****load of water into the engine bay.
You can definitely tell by the speed that you'd be kicking up a ****load of water into the engine bay.
True, I agree. The thing is, you would have to have one hell of a lucky splashe to hit the small little splash preventer snorkel on the airbox to fill it. Or, it would accumulate over time as mentioned already. But, I can't see it making its way past the filter (if cotton). I have seen a stock cotton filter stop water from passing it (and air when wet) so many time now, I guess I am just convinced of it's ability to protect the engine from water damage. Don't get me wrong, I'm no fool. I know that these things aren't invinceable, or impenetrable. I just can't beleive a run like THAT one, would kill it. I KNOW that it can, I just can't beleive it. You know?
Oh I hear you. If you saw the puddle I went through that blew my engine up you'd cry. Less water than his video and so much slower it's depressing.
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