Is there a “weep hole” or drain hole in the muffler of a 2004 Nissan Frontier?

Question

My son has a 2004 Nissan Frontier xe-v6.  I saw fluid dripping out of it at about the midway point of the truck.  When I looked underneath it looked like the water was coming from a small hole in the forward side of the muffler.  I drove the truck for a few minutes to warm it up to see if it was just moisture from exhaust condensation.  When I checked again in about 5 minutes no fluid was dripping.  That leads me to believe it is simply condensation from warm air on a cold morning that would sometimes be seen coming out of the back of the exhaust.  I thought about using a steel putty to seal the hole but when I looked at it better the hole seems too perfect to be from rust or to have just developed.  There is no rust around the hole or on the muffler that I can see.  I have read that some mufflers have a "weep hole".  Until researching this I had never known of any vehicle that has this but it makes some sense as the collection of this condensation is what can cause rusting in the bottom of any part of the exhaust system.  I am now a little leery of patching up an intentional hole.  Have I gotten some bad information about the "weep hole" even existing?
Any help on this would be appreciated.
thank you

blakey · Answer

Don't seal the hole it will stop your muffler from rotting inside out.

Anonymous · Answer

Yes.

Please realize the great amount of atmospheric moisture (humidity) that is sucked into the engine through the air filter and passes through the engine and out through the exhaust system back to the atmosphere.

Joseph · Answer

Yes, there is a weep hole and it's there, just as you surmised, to drain the condensate from the muffler.

Anonymous · Answer

If it is perfectly round then it was a drilled hole. FOR A PURPOSE.  It is in the design of the muffler.  Not something you need to worry about.  I am not gonna look at my car cause I am comfy on the couch.  Just drive properly and life is PEACHY.

thebax2006 · Answer

Just leave it alone. I've seen plenty of mufflers with a weep hole.

0NE TRlCK P0NY · Answer

The muffler on my car has the same hole. The car is only a month old so I doubt it has rusted and it's a drain.

? · Answer

In fact, many mufflers DO have a weep hole,  for just the purpose you envisage.  And it's usually in the forward face of the muffler at its lowest point. I don't know about that particular one. You could always as a Nissan dealer or even an exhaust shop.

Anonymous · Answer

There are NO holes in the exhaust system.  If your exhaust is not making any loud sound or sounds normal, there is nothing wrong with it.

STEVEN F · Answer

There shouldn't be ANY holes ANYWHERE in the exhaust.

Pearl · Answer

maybe you should get a mechanic to check it out

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Is there a “weep hole” or drain hole in the muffler of a 2004 Nissan Frontier?

12 Answers