A
Anonymous
Guest
This is just out of curiosity. I've seen a couple of SUV's in which water sometimes comes out the exhaust tip when they accelerate. Does anybody know why that happens???
I believe correct me if I'm wrong guys, that this is condesation, and when they accelerate the water comes out...... almost positive but not sure...
Yes, it is just condensation. Nothing to be alarmed about.....that is unless it seems like a gallon or two is comming out of the exhaust tips.
But seriously, it is a common occurance when the temps get low. Mine spits water quite regularly.
Ted
But seriously, it is a common occurance when the temps get low. Mine spits water quite regularly.
Ted
One of the main byproducts of burning gasoline is water. For every gallon burned there is roughly a gallon of water produced. If the tailpipe is cool enough, this water will condense inside the pipe and drip out. It is just like the vapor trails behind high-flying jet aircraft, only it is cold enough up there for the water to condense almost immediately.
Joe
Joe
66200i6
Famous Member
When the exhaust system is completely warmed up and at operating temp the entire exhaust system is more than likely completely dry inside. When the system is shut down the temp falls from operating temperatures to whatever the ambient temp is. When this happens the colder moist air is drawn into the exhaust pipe. The next time the system is started up the cold exhaust pipe is heated condensing the colder moist air and forcing it out the back.
This whole process has created discussions in the past as to the need to start your rig once a month. Is it wise to do this or not. I have had to replace entire systems because I had practiced this. My solution was to have stainless installed from the muffler back. I haven’t had to replace it since.
My two cents, Ric.
This whole process has created discussions in the past as to the need to start your rig once a month. Is it wise to do this or not. I have had to replace entire systems because I had practiced this. My solution was to have stainless installed from the muffler back. I haven’t had to replace it since.
My two cents, Ric.
A
Anonymous
Guest
As Joe mentioned, it is a product of combustion. The cold "moist" air is not necessarily drawn into the pipe upon shutdown. Air has the ability to hold more water at higher temps than at lower temps. So upon shut down, the pipes cool, and the exhaust gases cool, condensing water from the exhaust gases inside the pipes. Upon startup, you may get some of this water blowing out, but then more water is generated as the the hot "wet" combustion gases get cooled by the cool pipes and condense more liquid out. Once the exhaust system pipes are up to temp, less water will be condensed and it will be less noticeable at the exhaust. However, the air is still quite moist as can be felt by putting your hand or rag over a running exhaust.
Doug
Doug
