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Old 11-20-2013, 06:25 PM   #1
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Need yj expert to help asap!!

So today I thought it would be a good idea to floor a nearly stock jeep threw 31/2 feet of water not knowing how deep it was, it staled... I tried cracking her over multiple times hopeing that it would start, I finally got out and opened the hood and progressed to take the air filter out, keep in mind it's a 91 yj so it does have fuel injection, I used a hoes to suck a lot of the water out of the injecters and tried cranking it over again, the jeep was on a slant with the ass end deeper that the front so the exhaust pipe was about 2 feet under water.. so I finally got it out with a hour of struggling.... I put jumper cables on and she was hesitant to start but she did start up, approximately 8 gallons pored out of the exhaust and then I started hearing a loud taping coming from the motor, I drove for about 3 miles and drained the oil and did a oil change without replacing the oil filter, when I started her up the knock still did not go away....I checked the oil and at the very tip of the dip stick seemed to be a throw up looking oil/water drove about anouthe 5 miles like that and now she parked.... Any ideas? Thank you.

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Old 11-20-2013, 06:32 PM   #2
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You probly have a leaking head gasket when it stalled in the water you probly filled a cyclender and the pressure on the upward stroke probly stretched the head bolts and not you need to replace the head gasket and possible stud the head to fix the problem

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Old 11-20-2013, 06:40 PM   #3
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Not as simple as a oil change? It runs perfect besides the taping noise
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Old 11-20-2013, 06:44 PM   #4
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Water in the engine causes very very bad things. Water can not compress like air so rolling it over after it stalled could have caused significant internal engine issues. The tapping could likely be a bent or broken connecting rod. I would pull the oil pan and see what you can see.
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Old 11-20-2013, 06:53 PM   #5
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Ok I will
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Old 11-20-2013, 06:54 PM   #6
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Quote:
Originally Posted by daddyjeep View Post
Water in the engine causes very very bad things. Water can not compress like air so rolling it over after it stalled could have caused significant internal engine issues. The tapping could likely be a bent or broken connecting rod. I would pull the oil pan and see what you can see.
x2 and Yikes! Never try and start after you've got ANY water in it!! I'm not sure how you sucked water "out of the injectors." Nothing should have gotten into the fuel since its FI. Do you mean the intake? That would make more sense. I'd recommend a cylinder leak down test to see what might have gotten bent or broken in the cylinders. I hope it not too bad. Whatever water got in there is likely gone now after driving and the oil change so can't get any worse.
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Old 11-20-2013, 06:54 PM   #7
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Connecting rod? Not a crank rod? Or are they the same thing?
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Old 11-20-2013, 07:14 PM   #8
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Originally Posted by BrokenYJ... View Post
Connecting rod? Not a crank rod? Or are they the same thing?

Same Thing!

Good luck and keep your fingers crossed. Cranking an engine over when it has water in it is not good.

cb
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Old 11-20-2013, 07:32 PM   #9
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I know and what makes it worse is that it's not mine....
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Old 11-20-2013, 07:33 PM   #10
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There she is
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Old 11-20-2013, 07:34 PM   #11
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Not me in the picture I was actually extremely mad.
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Old 11-20-2013, 09:42 PM   #12
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Just pulled the plugs and the first cylinder (the one nearest to the front of the jeep) came out with small rocks... Anybody have a yj motor?....
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Old 11-20-2013, 10:52 PM   #13
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still need to check your compression to see If you can save it.
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Old 11-21-2013, 09:13 AM   #14
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How can I save it I was gonna take the heads of to reveal the pistons and clean it up in there
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Old 11-21-2013, 07:50 PM   #15
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Pull the cylinder head worst will be a valve job. See if there is any damage to the pistons. With the pan off you can spray some brake clean in there and let it drip dry. Then reassemble if it is still good.
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Old 11-21-2013, 11:41 PM   #16
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So if I read it correctly, you "floored" it in deep water? I'm guessing so much water came into the high revving motor through the air intake that at the very least you bent or broke a connecting rod, or two. The gravel you found, in my opinion, is secondary to a larger problem. I suggest calling the owner of the jeep, and let them know you owe them a motor.

I've had to make that call, it's not easy! But that was 30 years ago. We can laugh about it now.

Good luck, and hope the owner of the jeep is a good friend.
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Old 11-22-2013, 07:52 AM   #17
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It's my fathers jeep and I already assumed I need to buy him a new motor anyways, how long will it run as is?
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Old 11-22-2013, 08:19 AM   #18
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I'm guessing you have to get it home from wherever it is? If you absolutely have to drive it, I think it will go pretty far. The knocking you hear will probably get progressively worse. If the oil still looks like it has water in it, I'd change it and the filter one more time. As you drive it, keep an eye on the coolant temp gauge and oil pressure gauge. My brother-in-law drove a couple hundred miles with a knocking connecting rod. I was surprised at how little damage occurred.

All that being said, this is just my opinion based on what I've read. There is a chance it's not as bad as I think. On the other hand it may only go a few more miles.

Please let us know how it goes. We wish you the best, and hope your dad takes the news well. I'm looking forward to reading about the rebuild.
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Old 11-22-2013, 08:37 AM   #19
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Most likely doing motor swap
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Old 11-22-2013, 11:19 AM   #20
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Before you go ahead and spend the money on a motor swap, at least tear into and and see what is damaged. The cost of a rod and some gaskets is far cheaper than another motor.
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Old 11-22-2013, 02:23 PM   #21
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I don't even know if it's work it the motor has 160 k on it
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Old 11-22-2013, 02:29 PM   #22
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Hell give it to me... I'll rebuild it
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Old 11-22-2013, 09:55 PM   #23
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For how much
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Old 11-22-2013, 09:58 PM   #24
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Lol I said give haha...
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Old 11-23-2013, 01:10 AM   #25
Guesses a lot ;)

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I did a similar thing to mine. Swamped it up to the headlights. It didnt start knocking but I have reaped the consequences. Make sure you keep a real close eye on it. My o2 sensor failed, exhaust got super hot, cracked the header and took the head gasket out with it... Or at least thats what I think happened. hahaha
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Old 11-23-2013, 09:38 PM   #26
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[ATTACH]537794[/ATTACH


Is this bad?
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Old 11-23-2013, 10:11 PM   #27
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At least it's not beat up... Hmmmm
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Old 11-24-2013, 12:23 AM   #28
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What do u mean
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Old 11-24-2013, 08:39 AM   #29
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Here is the first thing i would do: pull all the plugs and crank over the engine to try and spit out anything that might be in there. You said rocks came out when you cranked 1 cyl.(I once put in a junk yard motor that had a screw in the cylinder and it sounded like a rod knock.)If you can get somewhere that has a compressor, blow air into the cylinders to also assist the clean out. Do not put the tip of the blow gun into the cylinder while cranking. This is an additional step to clear out anything that may be in the cyl.Then i would drain out the oil and replace the filter. i would then replace the oil with one less quart than is called for. the other quart will be a quart of transmission fluid. The transmission fluid is high in detergent and may help to loosen up the lifters. Let it run at idle for awhile.There is a remote chance a lifter has collapsed.This could be a cheap fix and if not, you are only out some oil and time.
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Old 11-24-2013, 03:23 PM   #30
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Thank you very much I don't have a air compressior at my house ATM so I'm just going to crank it over, I've already drained the oil and I'm going to the store in a bit and is there a specific type of transmission oil I should use?

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