Mufflers Turning Black - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ouhockeyplayer · 03-02-2011, 09:16 AM

So I started my Camaro up for the first time in a while, and I noticed that there was some black residue on the garage floor after I moved it out of the garage. Upon further inspection, I see that the bottom of my mufflers have big black spots on the bottom. Almost like oil residue. Is this normal. Is it a function of the car running rich? It has not been run in a while due to sitting around for winter. Felt good and weird to be back in the car again. The Cobalt just doesn't compare.

bradshaw · 03-02-2011, 09:21 AM

I noticed the same thing, had to scrub with scotch brite to remove it from the bottom of the mufflers, it is coming from the drain hole , I think this is just normal exhaust vapors that are expelled from the engine that is causing this.

ouhockeyplayer · 03-02-2011, 09:34 AM

Thanks for the quick response. I guess when it gets warm enough outside to finally wash the car I will have to work on cleaning the mufflers too.

ketel0ne · 03-02-2011, 09:36 AM

I believe it is carbon and it comes from the small holes in the mufflers that allow water to run out of them. I painted mine with high temp flat black paint and they disappear under the car.

RSokie · 03-02-2011, 09:41 AM

It could be from the oil going into the cylinders if you dont have a catch can.

ouhockeyplayer · 03-02-2011, 11:30 AM

Nope don't have a catch can. Is the oil going into the cylinders common? Maybe a catch can is a possible purchase to avoid this black mess.

2010SSRSM6 · 03-02-2011, 12:19 PM

The factory tune is REALLY REALLY RICH. If you do any mods like CAI, Headers, etc, it will get worse until you have the car tuned.

DarkneSS · 03-02-2011, 12:20 PM

Every car Ive ever owned or seen has black soot/residue in the tail pipes.

Rockslam · 03-02-2011, 04:30 PM

Quote:

Originally Posted by 2010SSRSM6

The factory tune is REALLY REALLY RICH. If you do any mods like CAI, Headers, etc, it will get worse until you have the car tuned.

I would have thought adding more air flow would lean it down , not make it worse.

Ironheadspearo · 03-02-2011, 04:51 PM

I would think GM designed the car to run rich, tuning this out might make it run better but break down faster....

ffrcobra_65 · 03-02-2011, 07:36 PM

It is not oil. This is nothing to worry about. It is soot and water(condensation) mixture seeping from the weep hole at the bottom of each muffler can. Be happy the weep holes are actually not clogged up and are draining otherwise, the innards of the mufflers would rust and eventually rattle.

tom692010 · 03-02-2011, 08:16 PM

Quote:

Originally Posted by ketel0ne

I believe it is carbon and it comes from the small holes in the mufflers that allow water to run out of them. I painted mine with high temp flat black paint and they disappear under the car.

Ditto,never notice it anymore

tom692010 · 03-02-2011, 08:17 PM

Quote:

Originally Posted by ffrcobra_65

It is not oil. This is nothing to worry about. It is soot and water(condensation) mixture seeping from the weep hole at the bottom of each muffler can. Be happy the weep holes are actually not clogged up and are draining otherwise, the innards of the mufflers would rust and eventually rattle.

Depending on your vin # that happens anyway. I know 1st hand along with alot of other people.

03-02-2011, 09:16 AM	#1
ouhockeyplayer Drives: 2010 Camaro RS Join Date: Jun 2010 Location: Michigan Posts: 125	Mufflers Turning Black So I started my Camaro up for the first time in a while, and I noticed that there was some black residue on the garage floor after I moved it out of the garage. Upon further inspection, I see that the bottom of my mufflers have big black spots on the bottom. Almost like oil residue. Is this normal. Is it a function of the car running rich? It has not been run in a while due to sitting around for winter. Felt good and weird to be back in the car again. The Cobalt just doesn't compare.

03-02-2011, 09:41 AM	#5
RSokie Proud owner of Litho #195 Drives: 2011 CGM 2LT/RS Join Date: Sep 2010 Location: Oklahoma Posts: 2,551	It could be from the oil going into the cylinders if you dont have a catch can. __________________ *Mods:http://www.camaro5.com/forums/showthread.php?p=3139029#post3139029* *Team LLT Social Group Link:http://www.camaro5.com/forums/group.php?groupid=256*

03-02-2011, 12:19 PM	#7
2010SSRSM6 Drives: My wife crazy with my C5 usage. Join Date: Apr 2009 Location: DFW Posts: 6,553 View My Garage	The factory tune is REALLY REALLY RICH. If you do any mods like CAI, Headers, etc, it will get worse until you have the car tuned. __________________ UNDER CONSTRUCTION......again......

03-02-2011, 04:51 PM	#10
Ironheadspearo ride the pain train Drives: 2011 1LT RS, 1998 fxstc HD Join Date: Jun 2010 Location: Daytona Beach Posts: 2,047	I would think GM designed the car to run rich, tuning this out might make it run better but break down faster.... __________________ PAIN is temporary, PRIDE is forever......RACE HARD

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03-02-2011, 09:21 AM	#2
bradshaw Drives: 2010 LS3 2SS M6 Join Date: Mar 2010 Location: Lafayette, La Posts: 158 View My Garage	I noticed the same thing, had to scrub with scotch brite to remove it from the bottom of the mufflers, it is coming from the drain hole , I think this is just normal exhaust vapors that are expelled from the engine that is causing this.

03-02-2011, 09:34 AM	#3
ouhockeyplayer Drives: 2010 Camaro RS Join Date: Jun 2010 Location: Michigan Posts: 125	Thanks for the quick response. I guess when it gets warm enough outside to finally wash the car I will have to work on cleaning the mufflers too.

03-02-2011, 09:36 AM	#4
ketel0ne Drives: Used to have 2010 SGM Join Date: Jul 2010 Location: Charles Town, WV Posts: 1,314 View My Garage	I believe it is carbon and it comes from the small holes in the mufflers that allow water to run out of them. I painted mine with high temp flat black paint and they disappear under the car.

03-02-2011, 11:30 AM	#6
ouhockeyplayer Drives: 2010 Camaro RS Join Date: Jun 2010 Location: Michigan Posts: 125	Nope don't have a catch can. Is the oil going into the cylinders common? Maybe a catch can is a possible purchase to avoid this black mess.

03-02-2011, 12:20 PM	#8
DarkneSS Account Suspended Drives: 2010 Camaro 2SS/RS 6MT Join Date: Apr 2010 Location: Westchester, New York Posts: 3,715	Every car Ive ever owned or seen has black soot/residue in the tail pipes.

03-02-2011, 07:36 PM	#11
ffrcobra_65 Account Suspended Drives: SuperCharged 2SS/RS IOM MN6 Join Date: May 2009 Location: CA Posts: 5,094	It is not oil. This is nothing to worry about. It is soot and water(condensation) mixture seeping from the weep hole at the bottom of each muffler can. Be happy the weep holes are actually not clogged up and are draining otherwise, the innards of the mufflers would rust and eventually rattle.