Water leaking from muffler

Discussion in 'Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)' started by Trailmom, Mar 8, 2012.

  1. Trailmom

    Trailmom New Member

    I have a 2011 4x4 Tahoe. It has a little over a thousand miles on it. Easy around town driving for the most part.
    I ran a few errands today & noticed every time I parked, water or fluid was dripping out of the muffler. Right where
    the back seat door is, I bent down to look underneath. Before muffler meets pipes. Is this normal? Seems like alot to me.
  2. Conlan Rose

    Conlan Rose Epic Member 5+ Years 1000 Posts

    it is most likely condensation forming on the hot muffler and within it. this water is created durring normal combustion its basic chem
    2 C[SUB]8[/SUB]H[SUB]18[/SUB] + 25 O[SUB]2[/SUB] → 16 CO[SUB]2[/SUB] + 18 H[SUB]2[/SUB]O
    Last edited: Mar 8, 2012
  3. Trailmom

    Trailmom New Member

    Thanks so much for your quick reply. Just seemed an abnormal amount since it was running down the driveway.
  4. BillD64

    BillD64 Rockstar

    You need to put about 30 miles of highway driving on the vehicle and then check to see if there is any liquid coming out. Making short trips doesn't allow the exhaust system to heat up. As posted above exhaust gas has a lot of water in it and if the piping/mufflers aren't hot enough to keep it in gaseous form it will condense and find its way out of the nearest point hole. I don't know how far you have to go to get it hot but I do know 30 miles will do it. If you are still getting a lot of fluid out after driving a long distance then you might have a problem.

  5. nikkeshelton

    nikkeshelton Member 2 Years 100 Posts

    there is a little drain hole at the end of the muffler so condensation can escape. Hopefully resulting in a muffler that dosen't rust out!
  6. Dana W

    Dana W Rockstar 3 Years 500 Posts

    Naaaah, it's a worn out muffler bearing.:happy:
  7. rileyjr16

    rileyjr16 Epic Member 5+ Years 1000 Posts

  8. Sierraowner5.3

    Sierraowner5.3 Epic Member 5+ Years 1000 Posts

    ive heard of this, its from the muffler fluid not being changed.

  9. Coach24

    Coach24 Rockstar 3 Years 5000 Posts

    We have a lot of characters here but in all seriousness, if the shop guy did not change the muffler fluid when you had your oil changed...... OOPs

    As mentioned above the moisture can build up when weather is cool and exhaust doesnt get hot enough to create a gas to exit through the tail pipe.
    Take a good drive and get it warmed up then recheck. Allowing the condensation to remain in the muffler for long periods of time will cost money for a new muffler far too soon.
  10. RayVoy

    RayVoy Epic Member 5+ Years 5000 Posts

    All the guys above are correct, moisture (condensation) will form inside the muffler and drip out of the tailpipe.

    But, there are other places for condensation to originate, the front (underhood) ac will drip condensation under the truck (but this is at the front); however, if you have a rear ac system, condensation can/will drip from that. The rear system has a hose that lets water drip from the area under the seat.

    If you were driving with the rear ac turned on, try if with the rear turned off and see if the dripping stops.

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