exhaust under water

[eat_sleep_jeep]

We had a big storm here today so of course the first thing I did when I got home was grab my keys. I went wheelin with one of my friends and it was nuts. I was going through an overflowed mud pit with water over my bumpers. I have heard many things that if you stall with your exhaust under water it will suck water into the engine and ruin it. I was wondering how true this was and what exactly happens. Is this a bad idea?

 

[ROade]

I would think,getting water in through the intake would be a bigger issue.
Water in the exhaust shouldnt be a ploblem,unless it is above the exhaust ports on the heads.
Just my thoughts.

 

[LBR]

electric fan

Water won't be sucked into the engine per say, but if the water level is higher than (approx.) the exaust valve, there is a chance water can get into the combustion chamber - if you stall out and think that this has happened, DO NOT attempt to start the engine! Get your rig to higher, drier ground, pull out your spark plugs and purge the water out of the cylinders with the starter, replace plugs, and attempt to restart. If you try to start an engine with water in the combustion chambers, it will "hydraulic" the cylinder(s) and more times than not bent the connecting rod(s) LBR

 

[Junkpile]

Just cut the tip of the exhaust pipe off to where the end is flat and pointing straight out. Now weld a 2 or 3 bolt flange to the end. Weld a matching flange to a piece of exhaust pipe that's bent at 90degrees near the end that you weld the flange to. Then when you go in the deep stuff you can bolt the extension to the end of your exhaust and keep it high and dry. This is easier to do with a 3" exhaust because you can use header collector flanges, but flanges can be found or made to fit smaller pipe. The extension(s) can then be stored under the Jeep until you need them.

 

[Craig]

I've stalled with my exhaust under water many times and never had a problem. If you stall, get it running as quickly as possible (as long as your intake isn't underwater) and that'll keep water out of the exhaust. A little water up the exhaust won't do damage except mabye rust out your muffler. Too much water up there and most likely it won't start (kinda like shoving a banana up a tailpipe...not that I know). I've heard of people blowing up their mufflers, usually older, rusted ones.

 

[currupt4130]

if you stall underwater use the famous jeep starting method as to avoid any complications with your clutch, dont put it in just turn the key and go. if you stall deep enough yea you can suck it up into your exhuast ports and your engine will lock up

 

[Snitty]

SUCK it into the exhaust ports??? can somebody explain this?

 

[Joopin]

I heard the only way water will get in there is when you let off the gas, greater chance if you floor it then let off quickly. If your exhaust is under and you have to get out of the jeep, let your foot off the gas Gradually, then the idle of the engine is usually sufficiant to keep water out.

I have seen rigs that have a way to control the idle of the engine from inside the cab... or a cheaper way is to get a hand throttle. Then when you in that situation, put it in neutral, set the throttle where you want it, and tighten down the screw. Havn't needed to do this with mine yet, no water deep enough around here, that and I have 18 exhaust leaks.

 

[hi_c]

This is exactly why the stock exhaust tip is turned down. Also, it's "hydro-lock" when the motor tries to combust water... not "hydraulic". I'm not the word-police, but don't want you to go around town saying "hydraulic" when you mean "hydro-lock". (Latin for water causing the engine to lock up).

Corey

 

[graewulf]

i sink mine all the time past the tailpipe...just dont shut it of in water and you're fine.. try to keep it below the exhaust manifold just in case.