It's normal.

 

Must be normal!! mine has dual exhausts.....it drips water on "warmer" days and if it sets there long,they get as big around as steel coffee can lid or bigger.Drips steady til it moves. Never had a problem, and it don't show up in the oil.

 

Normal.

 

Hope it's normal. Mine does it.

 

Condensation is normal. Ever watch someone pull out on a highway and see a cloud of water vapor come out of their exhaust pipe? When faced with sudden acceleration, the water vaporizes and comes out as mist.

If you are warming up your vehicle while it sits in the driveway, the water droplets will get pushed out the exhaust pipe and form a puddle. If the relative humidity is high, more will be produced than if the atmosphere is dry.

Maybe it's all that water-absorbing gas they produce today that is making it seem more severe!

 

John, I think you are on to something. I don't want to highjack the thread, but I suppose it's possible that the higher ethanol fuels may contribute to this. Interesting thought.
Anyway, I am sometimes surprised by the amount of water than can come out of the muffler. I still think it's normal.

 

Another factor to consider here;When this water is dripping out of the tailpipe...If you can run the engine till this stops,other wise if you put it back in the garage , leave it out , whatever. Tis is when the exhauxt system starts to rust out.I run my 50 merc my 49 convert, and my 32 coupe, all chevy powered . during the winter months.
Its just good to do this, and before i shut any of them off, i put a paper towl up the tailpipe.....no moisture.no rust can form.
jmo bob s

 

I don't worry about the rust. As long as you get the truck out and run it to full operating temp frequently, you won't have an issue. My truck goes about 22 miles each way to work. The exhaust gets fully heated, and the moisture is driven out of it. For comparison, my daughter drives 1.5 miles to school each day. She will definitely go through a muffler or 2 on her car. I encorage her to get out and run it once in a while, but she doesn't.
I don't think I would ever put a paper towel in my exhaust. I am not sure there is a benefit, and I'd be afraid I'd leave it in there the next time I went somewhere.

 

you also have to look at it like this..on the cold days with the temp of the exhaust vs ambient air temp..it will usually cause some type of condensation

 

Paper towel is just for checking for remainig water left in pipe. And yes i agree that mileage driven is a prime factor in preserving the life of your mufflers pipes etc My old low-rider went thru 4 owners now rests at 240,000
miles on the clock. simply cause it was drive 40 miles a day back and forth.City to city.

But running them any less than the warm up period before your temp gauge is at its normal warmed up spot we'll jus say. Is useless.all water has to be run out of the system.I wouldn't be dumb enough to leave a ....anything in my tail pipe.not even a potato!

 

Water is normal, when it is more humid out you will get more. Your engine converts fuel to energy expelling exhaust gasses, CO, NOX, CO2 etc.
In the Catalytic converter it oxidizes your "bad" emissions turning them into CO2 and the excess hydrogen molecules bond with the excess oxygen molecules to create H2O.

 

i understand the tailpipe theory....i originally stated that....but the "swimming pool" is coming out of the "Muffler" straight to the ground and yes i run it enough to get to normal operating temps.
Still normal?

 

Till I read this tread I thought about taking my truck back to the dealer. My truck just about fogs up the neighbor hood when I leave for work in the morning. It does calm down after every thing has had a chance to warm up.

 

i understand the tailpipe theory....i originally stated that....but the "swimming pool" is coming out of the "Muffler" straight to the ground and yes i run it enough to get to normal operating temps.
Still normal?

I guess I read "muffler" and interpreted "tailpipe". The only difference in my mind is that your muffler probably has a rust hole in it at the lowest point from retaining moisture, and therefore it drips from the muffler. The big cavity of the muffler is where the maximum water will condense anyway.

When you say you run it enough to get to normal operating temps, (I don't want to assume here) does that include driving the vehicle or is it just running in the driveway? If the vehicle is sitting still, that would account for MORE water condensing than if it was moving. Here's why: Rapid air flow through the exhaust system (i.e. driving conditions) would carry particles of water out with the exhaust. Sitting at idle, even if getting to operating temperature will produce excessive water, because there isn't enough air flow to expel it. Reving the engine won't do much good either.

I have a car I don't drive in the winter. The first few winters I would run it (to normal operating temp) and the muffler rotted away pretty quickly. Now, I just charge the battery every month, and don't run it at all. Seems to work better all around, and much cheaper too!

 

thanks for the many replies. it is a 2010 Silverado and i use it almost everyday (90% of the time). i drive it everywhere. When i called the service department, they said the muffler has a drainhole in it and that it was normal, but i know some of those "service Reps" will say anything. A co-worker brought his wife's 2009 car in for noisey lifters...the dealer changed the oil which didn't fix it (nah-duh!), then they replaced the engine (what?). Technicians are not always Mechanics.

 

I was going to post this same thing - changing from a Diesel that had almost no visible fumes - except when hopping on it to the highway or when cold - I thought mine was doing something bad.

Lots of white 'smoke' condensation when cold, backs off when warmer but if the temps are cold it can be seen all the time.

 

I have the same with my Duramax. It's kinda fun.... After it has it's 5 or 10 min morning warm up time I take it down Lakeshore Drive LOL I don't has to worry about tailgaters LOL
Well if there was a tailgater, I can't see him in my white misty cloud.

 

I'm having the same problem , my truck actually if left running on a drive way my pool of water seems to be mixed with oil or may just be exhaust, I have no more them 11,000 miles on my 250hd Silverado .

I have another complaint , my truck is black and has numerous swirl marks in the paint.

Any one else?
waltermanion

If anyone has input PLEASE REPLY.

 

Did you ever get any feedback on this? I have the same thing happening on my 2020 Silverado. Noticed a black puddle on my driveway and when I checked it, it wasn’t oil, it was moist and chalky but black. Looked under my truck and noticed it coming from the weep hole in the muffler. Took it in to GMC service center and they said it was normal. Black spots in my driveway is not acceptable… Anybody have any feedback or a fix?

 

Hey all, I know this thread is old, and I'm a bit of a FNG, but if anybody searches this issue like I just was, I'd like to assure you- your truck is not broken. This puddle under the muffler is perfectly normal. Especially on short trips! I too was a little worried, but upon more research we're all just paranoid. Here are some pictures to help relieve your stress-

This is the puddle mine left on about a fifty degree day and a one mile drive.

This is the approximate area of the weep hole, but it is on the back "wall" so to speak of the muffler. Notice all the carbon build-up in the area of the hole. The water that comes out is fairly dirty as it did just come out of a carbon filled exhaust pipe.

Sorry to bring up an old thread and I hope this helps any other FNGs or people who are paranoid like me!

 

A worthy thread to revive. Thanks for the info, and I agree-- that is normal. so is the muffler pinging as it cools down.

 

Grrr!!!

 

Well, when your engine runs, it burns gas, and some of the resulting exhaust includes H2O. As the exhaust gases travel through your exhaust system, it cools, causing some of that H2O to condense into liquid form. When this liquid drips out of the muffler (it's designed to, otherwise it just rusts the muffler out from the inside), it also carries along bits of carbon that collects inside the muffler.

 

^^^^ this. It's normal.

Plus, you resurrected a nine year dead thread. Next time, please start a new thread.