Dripping muffler . . . what are my options ? - Page 2 - Pontiac Solstice Forum
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post #16 of 34 (permalink) Old 04-07-2019, 07:47 PM
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If a weep hole is engineered into the muffler design for water mitigation, the hole would be located on the bottom surface. The location of the hole in the muffler pictured would not allow all the water to exit.

I'm not sure if a weep hole is required on a muffler. The heat inside should evaporate the water.

Any muffler engineers out there?
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post #17 of 34 (permalink) Old 04-08-2019, 07:32 AM
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Sounds like it's supposed to be there.

For the GMPP exhaust for the 2.4L, Borla still has them in stock in their "closeout corner" section. Mine was even stamped as a GMPP part.

https://www.borla.com/products/solst..._17802058.html

(If that link goes away, you can also google "borla 17802058".) As of today, they're $249 plus shipping for the complete cat-back.

If it turns out to be a crack or rust or whatever, you could have a muffler shop or any competent welder fix it, probably for about $30-$50 based on my experience. YMMV.

That should bolt up to the GXP as well, but it's a single-exit exhaust.

Blue-ish 2006 2.4, Werks stage 1 turbo, Borla cat-back, DDM braces, Spec aluminum flywheel, Spec stage 2 clutch, Werks aluminum radiator, some gauges, RKSport hood, Morimoto FX-Rs, GReddy Profec, Norm's fenders

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post #18 of 34 (permalink) Old 04-08-2019, 07:58 AM
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Quote:
Originally Posted by raygun View Post
That should bolt up to the GXP as well, but it's a single-exit exhaust.
GMPP also had one for the GXP which was dual outlet.



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post #19 of 34 (permalink) Old 04-08-2019, 08:00 AM
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The holes in my RL mufflers definitely appear to be intentional, very round and precisely located. I can't quite imagine two mufflers rusting that way or in exactly the same location.

My NA muffler is not quite as early as Dave's, but it is an early 2007, so newer than either of the RLs. Is the lack of a hole because of its age, or because the NA mufflers were not thought to need them?
We need someone with a 2008 or 2009 NA to look for the hole in their muffler.
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post #20 of 34 (permalink) Old 04-08-2019, 10:22 AM
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Me too

I have a 2007 base, I noticed the same drip when I ran it a few times during the winter storage. It clears up as soon as everything warms up. I'm going to check it it out when I get home
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post #21 of 34 (permalink) Old 04-08-2019, 10:42 AM
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So after reading the above posts I have to believe that the mufflers were probably made by different suppliers that would seem to be why some have obvious weep holes and others don't ,I wouldn't plug it up it's there for a reason .Another example is that I purchased a GM performance exhaust system from my local dealer it and it was made by MagnaFlo and I've read that the GMPP exhaust was made by Borla so again two different manufactures .
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post #22 of 34 (permalink) Old 04-08-2019, 12:12 PM
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So after reading the above posts I have to believe that the mufflers were probably made by different suppliers that would seem to be why some have obvious weep holes and others don't ,I wouldn't plug it up it's there for a reason ........
Possibly, but my experience with OEM suppliers is that we all work to the same drawings, so one or the other would be a non-conforming part.
The two scenarios I think are most likely are that:
1) The difference is between NA and RL/GXP with one design having the hole and the other not. Or,
2) A design change was made sometime in 2006 (possibly coincident with the introduction of the RL/GXP) so that all subsequent mufflers have the hole.
We need a larger and more varied group of samples.
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post #23 of 34 (permalink) Old 04-09-2019, 03:35 AM
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My car is 2.4 NA in 2007, and the exhaust is completely factory, there is a water drain hole.
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post #24 of 34 (permalink) Old 04-09-2019, 11:02 AM
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It seems pretty clear that the hole is a design change that was made some time in late 2006 or early 2007.
My 2.4 built in February 2006 doesn't have it and your 2.4 built in July 2007 does.
I suppose it could also be a manufacturing defect that it took 2 years to catch, but I rather doubt that.
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post #25 of 34 (permalink) Old 04-09-2019, 11:44 AM
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Originally Posted by RedOne07 View Post
I checked the 2007 2.4 repair manual and could not find a reference to the wheephole, perhaps someone else is a better finder or maybe it is mentioned in repair manuals for other model years ?
But why would it ever be mentioned - it isn't like it is a service item.

The factory mufflers for the Kappas probably came from some Mexican factory and were made to GM specs. Lots of cars have mufflers with weep holes, it isn't at all unusual. Solstices seem to have been made both with and without. End of story. Doubt we'll ever be able to say much more about the subject.
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post #26 of 34 (permalink) Old 04-09-2019, 01:18 PM
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..... Doubt we'll ever be able to say much more about the subject.
Of all of the things that you have posted that I have disagreed with, this might be the most extreme. This is a forum, and this is an item of trivia. We will always be able to say more about it.
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post #27 of 34 (permalink) Old 04-09-2019, 01:22 PM
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Of all of the things that you have posted that I have disagreed with, this might be the most extreme. This is a forum, and this is an item of trivia. We will always be able to say more about it.
I guess that's true!


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post #28 of 34 (permalink) Old 04-09-2019, 01:31 PM
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Originally Posted by wspohn View Post
...Solstices seem to have been made both with and without. End of story. Doubt we'll ever be able to say much more about the subject.
Just wait until you try to sell yours at Barrett-Jackson in a few years and you don't have the factory muffler weep hole!

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post #29 of 34 (permalink) Old 04-09-2019, 02:26 PM
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Originally Posted by phil1734 View Post
Just wait until you try to sell yours at Barrett-Jackson in a few years and you don't have the factory muffler weep hole!
yep, like the C2 corvette hood surround 'dimple' in the upper driver's side ledge....
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post #30 of 34 (permalink) Old 04-09-2019, 02:53 PM
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Just wait until you try to sell yours at Barrett-Jackson in a few years and you don't have the factory muffler weep hole!
Except that if it ever came to that someone would know which VINs should have it and which shouldn't, so you also want to be sure that you didn't have a hole that wasn't supposed to be there..
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