Excessive moisture in exhaust? - Chevy Colorado & GMC Canyon
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post #1 of 3 (permalink) Old 05-14-2011, 08:26 PM Thread Starter
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Excessive moisture in exhaust?

So today I pulled my 05 I5 into the garage. I cleaned the TB and inspected my cam actuator. I started it up and let it idle for a while while trying to look for a vaccuum leak. I shut it down and started it up maybe 3 times over 20 min while I screwed around. I started it up to back it out and I noticed that there was quite a bit of moisture coming out of the tail pipe and a small hole in the muffler...

Think this is normal because it idled for a while and shut off/started a couple times? I'm gonna keep a close eye on it tomorrow when I start it up again.
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post #2 of 3 (permalink) Old 05-14-2011, 11:28 PM
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Re: Excessive moisture in exhaust?

Yup, normal, usually under normal "driving" conditions, the system heats up to operating temperatures and not as much water comes through the system. You can often see drips from tailpipes when vehicles are stopped for a light. Sounds like you were running your system a little "colder" and stationary, so you saw more water than you would normally notice.

Now, the small hole in your muffler was not immediatley caused by this, sounds like the muffler is reaching the end of its useful life. Of course, short frequent trips, lots of short runs with your engine, will produce more moisture and leave it in the exhaust system after shutdown. If this moisture doesn't get "burned off" by normal operating temperatures, rust can shorten the life of your system.

Commuters usually have systems that last a long time because of the daily fully reached operating temperatures.

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post #3 of 3 (permalink) Old 05-16-2011, 08:25 PM
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Re: Excessive moisture in exhaust?

The muffler has a small drain hole in it for just shuch a purpose. Either on the front or the back right at the lowest point before the lip. Most newer cars produce alot of water/condensation no matter how you drive it. (although short trips do make it worse) The hole will be very small about the size of a tooth pick.
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