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Old 12-03-2009, 10:48 AM   #1
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Weep hole in muffler? 2006 LJ -42,000 mi.

I just noticed some water dripping off the back of my skid plate. After further investigation - it was coming from what appears to be a weep hole in the bottom of the front of the muffler. It's dripping off the bottom of the muffler on to the back of the skid plate and on to the floor. I had just started the Jeep & backed it out of the garage to get the SAT radio activated. I pulled it back into the garage and noticed the dripping. I have not had the Jeep in any water. Is this weep hole supposed to be there or is this something the PO may have drilled to avoid water/moisture accumulation in the muffler? I know this used to be a trick in "the good old days" to drain excess moisture from muffler to avoid rust. In Penna., it's illegal to drill any holes in a muffler. What do you guys think? Thanks, Smitty

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Old 12-03-2009, 10:54 AM   #2
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That weep hole is standard, it's there to let the normal condensation drip out before it causes the muffler to rust through.

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Old 12-03-2009, 10:59 AM   #3
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That weep hole is standard, it's there to let the normal condensation drip out before it causes the muffler to rust through.
That is correct. You get it because you are doing a lot of short trips and the condensation accumulates in the muffler. If you do a lot of long trips like I do in my daily commute you never see any because the exhaust gets very hot and evaporates all of it.

My wife's old car has a lot of this and I had to replace the exhaust system every year because it would rust out. She only drove 5 miles each way to work and we took my beast on long trips.
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Old 12-03-2009, 11:02 AM   #4
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Actually just yesterday I moved my car about 10 ft and I parked. I saw fluid leaking down from my skidplate underneath my T-case. At first I was like oh crap, but it smelled like nothing and had the viscosity of water so im guessing it was just condensation.
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Old 12-03-2009, 04:20 PM   #5
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Thanks everybody! Smitty
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Old 12-03-2009, 06:53 PM   #6
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Originally Posted by Atthehop View Post
My wife's old car has a lot of this and I had to replace the exhaust system every year because it would rust out. She only drove 5 miles each way to work and we took my beast on long trips.
Drill your own small weep hole in the next new muffler you have installed if it doesn't already have one.
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Old 12-04-2009, 05:01 AM   #7
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Drill your own small weep hole in the next new muffler you have installed if it doesn't already have one.
They had one but if you don't get it hot enough ever to evaporate all the moisture it will rot out. That was back before SS exhaust. We are talking the 70's and living in a large city, not to date my self but you just cannot help getting old.
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Old 12-04-2009, 07:26 AM   #8
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I went to a local shop and had a new muffler intalled. I got the one with a lifetime warrenty. When the Tech. was installing it he asked me if I had the cheap one or the lifetime, I told him I got the lifetime, he took out a hammer and punch and place the weep hole in the muffler. I guss if it was the "cheap" one he would not have put the hole in it so it would rust out sooner.
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Old 12-04-2009, 10:16 AM   #9
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I went to a local shop and had a new muffler intalled. I got the one with a lifetime warrenty. When the Tech. was installing it he asked me if I had the cheap one or the lifetime, I told him I got the lifetime, he took out a hammer and punch and place the weep hole in the muffler. I guss if it was the "cheap" one he would not have put the hole in it so it would rust out sooner.
How else are they going to get you to buy another one. But if they have to give it to you for free they do not want you back. Also, lifetime warranties are for your life, you usually cannot reassign it to the next user.
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Old 12-04-2009, 10:35 AM   #10
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I went to a local shop and had a new muffler intalled. I got the one with a lifetime warrenty. When the Tech. was installing it he asked me if I had the cheap one or the lifetime, I told him I got the lifetime, he took out a hammer and punch and place the weep hole in the muffler. I guss if it was the "cheap" one he would not have put the hole in it so it would rust out sooner.
I think if I were you I would crawl under there with a drill (wear safety glasses) and drill that hole out. The reason I say is because when he took the punch the metal bent inward before it broke, creating a lip that will retain water. Yes, it is better than no hole, but a nice clean hole will drain much better.
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Old 12-04-2009, 03:27 PM   #11
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Good Tip.

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