Ex in too deep > Mud/water in exhaust pipe = problems?

[Hokie]

Well, I've been thinking about what maintence we should do to my friend's Ex now that he was dumb and didn't check the depth of the mud pit on saturday. Here's what we are looking at...

And this last one its clear his tail pipe was underwater for a little bit...

We're going to change his (and my) diff fluids and I might go ahead and change my tranny fluid since none of my breathers are extended yet.

Anyway, the truck never got water in the intake and he cut off the motor as soon as he dropped in it (and realized how deep it really was). People keep asking if water went up the tail pipe, and I thought that it was only a problem for crap to go in the intake and that it would be pretty hard for stuff to go up the exhaust (since there's no vaccum to suck it or anything) and gases are kinda pushing it out.

Anyway, should we be worried about his tail pipe being underwater while I had to pull him out? Thanks y'all

 

[Alec]

Never shut off the truck when it water unless you're gonna hydrolock! This forces water into the exhaust system. However, if the truck is running ok now then you lucked out. You may find it rusting out early, or your O2s or cats failing early though; but probably not from one minor stuck.

Yup, check all your fluids and the air filter. Also service your wheel bearings if you can (not sure about the 99). Clean off your shocks if they have exposed metal rods, and give everything else a good cleaning too. Check the frame and underbody for enough undercoating and add paint, vaseline, or undercoating for rust prevention.

Overkill? Maybe. But I did keep a well abused truck in tip-top shape for 7 years.

 

[Hokie]

Assuming service = repack? That can be done on the 01 but not on the 99? And why would shutting the truck off force water into the exhaust? (when the engine shuts off vaccum is created in the exhaust?)

Thanks for the info though, I'm checking into the bearings.

 

[88vert]

That looks like alot of fun

 

[Redrig]

That looks like alot of fun

yeah it does. when are we gonna see pics of the new limited like that?

 

[88vert]

Not any time soon Thats my baby

 

[mhn3773]

i think when u start the car back up itl suck up anywater that in the exh....i think it kinda takes a big gulp of air when u first fire it up

 

[JDraper]

Originally posted by mhn3773
i think when u start the car back up itl suck up anywater that in the exh....i think it kinda takes a big gulp of air when u first fire it up

Uhhh, No. 4 cycle engines don't do that. Only way that would happen is if you rotate the engine backwards.

Besides what Alec suggested, I would pull all the carpeting and underlayment out and let it dry out. If you let it dry in the vehicle, it could take a looong time for all the moisture to leave, and that could cause some rust.

 

[Alec]

Yes, vacuum is created in the exhaust when you shut the motor off. This isn't due to the motor so much as the rapid cooling of the exhaust system.

BTW, a good dunking can also crack and warp metal parts due to the temperature differences, so check everything for leaks.

 

[Hokie]

Originally posted by JDraper

Besides what Alec suggested, I would pull all the carpeting and underlayment out and let it dry out. If you let it dry in the vehicle, it could take a looong time for all the moisture to leave, and that could cause some rust.

Yeah, i've told him to do that. And my wheel bearings are sealed so there's nothing I can do to service them. I guess if they go bad, well, then I'll just have to replace em

 

[ton_e_montana]

WHY ON EARTH???? :thumbdwn:

 

[Hokie]

Originally posted by ton_e_montana
WHY ON EARTH???? :thumbdwn:

What, why did he do it? Well, you were supposed to go the right (which is passable) Actually, I'm kinda curious if I'm high enough to make it through that (after I extend my breathers and all of that fun stuff! Not sure if I wanna risk it though) We're guessing it was ~28" deep if you look at that pic of his tire (he has 30"s). But really, he's just crazy and will drive through anything without thinking... well, maybe now he learned his lesson

 

[ton_e_montana]

Just looks like a nice truck at one point....hate to see it. Is it 4wd?

 

[Hokie]

Yeah, he has trashed that truck pretty quickly. Its an '01 4x4 Sport with leather and premium sound and he really doesn't care about his paint... it is almost scratched up beyond recognition (which i'm afraid mine will be too once I wash off the mud and can see the scratches clearly)

 

[hydroxy]

Hokie, you think that my diff and trans are gunna need flushing? I didn't go in the deep stuff, but you never know...

 

[Premier]

Didnt look too deep... I woulda just drove through it. Also howcome there is water inside?? Did the seals on the door leak or what?

 

[Hokie]

Originally posted by Premier
Didnt look too deep... I woulda just drove through it. Also howcome there is water inside?? Did the seals on the door leak or what?

He dropped in and didn't know if it was getting deeper so he backed off. And yeah, the water came right in through the door seam... pretty weak eh?

 

[Premier]

I wouldnt be a happy camper if mine leaked and it was that new. Mine is a 96 and it never leaks

 

[unclemeat]

There is another reason not to shut of the engine when stuck in deep water. It is very likely that you will not be able to restart it due to the addition pressure created water in the exaust system.

 

[DarkMan]

I've been told before that it's a good idea to drill a 1/8" or smaller hole in the lowest point on your muffler and cat to let moisture drain out. I haven't done it because they could end up underwater and I didn't want any more inlets than necessary.

What do ya'll think?