I have a new (under 2000 miles) 2008 F150 Supercrew Lariat 5.4. This morning I started it up then ran back in the house to get my lunch. As I returned to my truck I noticed something dripping from underneath. I looked underneath and the drips were coming from the front of the muffler (I was parked facing downhill). I got underneath far enough to reach the muffler and I could feel exhaust coming out and water dripping out from the front. Also the bottom front had a lot of black soot on it. I couldn't get far enough under to look at that part of the muffler to see where the leak was coming from. I didn' think a muffler should have any holes in it. Could this be a drainhole for condensation?

 

That is exactly what it is. If it was not there, your muffler would fill with water.

 

Wouldn't the muffler get hot enough to burn off the condensation every time you drove it?

 

I dont know, I never had a problm with the stock muffler, then I went to true dual straight pipes, so the water just runs right out the tips.

 

yes but only if you drive it long enough for the muffler to get hot. if you just make a bunch of short trips, the water would build up and rust out the muffler if not for the drain hole

 

One of the things that is formed when gasoline and air are heated (burn/reacted) then cooled is water(in vapor form due to the temp. of the reaction). There will always be water in the exhaust just in different forms you will not burn it off completely. It's chemistry and what not no need to get into it. Well the water is also an excellent filter and solvent(water is the universal solvent) that is why there is carbon (the black stuff) by the drain hole. Which to remove the water you need a drain hole. Hope that helps and there seems to be no need to worry about your exhaust!

 

Thanks for the responses. Hopefully, I will soon be replacing the stock exhaust with something better.