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Old 12-22-2021, 12:04 AM   #1
TheTexanPunjabi
 
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Less than 600 miles and spot on the driveway.

Took out my Z earlier today and saw this in the garage floor. Looks like a combination of soot and condensation. Reckon anyone else experience this?
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Old 12-22-2021, 12:22 AM   #2
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Quote:
Originally Posted by TheTexanPunjabi View Post
Took out my Z earlier today and saw this in the garage floor. Looks like a combination of soot and condensation. Reckon anyone else experience this?
That's weird, fortunately doesn't look like oil...
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Old 12-22-2021, 12:25 AM   #3
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I just had to drop my camaro off for warranty today for an exhaust leak on the drivers side head/ exhasut manifold. It caked the entire plug and wire in soot along with the neighbor cylinders maybe you have a similar situation.
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Old 12-22-2021, 01:28 AM   #4
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If it's under the exhaust, it looks like it may come from the holes where the muffler drains excess moisture and takes soot with it. If so it's normal. Check the bottom of muffler, you'll see the holes.
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Old 12-22-2021, 03:22 AM   #5
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Normal.

The weep holes in the bottom of the suitcase muffler will drip black carbonaceous condensate.
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Old 12-22-2021, 05:37 AM   #6
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Normal.....exhaust piss......just marking its territory......
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Old 12-22-2021, 06:43 AM   #7
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Ya I agree it's exhaust and "normal", weep holes exist for a reason...unfortunately.
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Old 12-22-2021, 06:49 AM   #8
hawk02
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I'll add to the list that says it's perfectly normal. You'll see it most when you haven't driven the car for awhile.
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Old 12-22-2021, 08:04 AM   #9
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Normal. I have it too, our cars are tuned rich from the factory to protect the Cats. It's exhaust dribble. You are fine.
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Old 12-22-2021, 09:00 AM   #10
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My ZL1 does it too so like the above replies say it’s normal and nothing to worry about.
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Old 12-22-2021, 10:20 AM   #11
Idaho2018GTPremium

 
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I would say it's normal only if it's coming from under the suitcase muffler, which has two holes to let excess moisture/condensate out. If it's from elsewhere under the car, then it is not normal.

When I wash my exhaust tips some water gets in the mufflers and it drains out somewhat through those holes.
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Old 12-22-2021, 10:33 AM   #12
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If that is under the exhaust tips......normal!
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Old 12-22-2021, 11:09 AM   #13
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This will be the source of your soot and condensation. As mentioned, if this is from the muffler area, it’s not weird and it is normal.
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Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“
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Old 12-22-2021, 11:17 AM   #14
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I sanded and sprayed some 303 anti-corrosion stuff around those holes, I assume muffler is made of aluminum or stainless or at least coated, but there was some light corrosion there from the water draining
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