Black Crap on Exhaust?
Thread Starter
Safety Car
Joined: Dec 2001
Posts: 4,295
Likes: 2
From: Indianapolis Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Black Crap on Exhaust?
Please read before posting: I'm NOT talking about the tips. You can only see what I'm talking about when you have the entire cat-back system off.
Now that I've swapped cat-back's, I'm just curious what all the garbage is that seems to always be stuck to the top of the mufflers? No, not the black soot on the rear of the tips...the junk that accumulates on top of the mufflers. Just seemed kinda odd to me...tar from the road? Did GM try to paint them stock?
[Modified by BQuicksilver, 10:02 AM 6/28/2003]
Now that I've swapped cat-back's, I'm just curious what all the garbage is that seems to always be stuck to the top of the mufflers? No, not the black soot on the rear of the tips...the junk that accumulates on top of the mufflers. Just seemed kinda odd to me...tar from the road? Did GM try to paint them stock?
[Modified by BQuicksilver, 10:02 AM 6/28/2003]
Thread Starter
Safety Car
Joined: Dec 2001
Posts: 4,295
Likes: 2
From: Indianapolis Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Black Crap on Exhaust? (AFVETTE)
Does the soot get that solid? It looks more like tar? You do know I'm talking about the solid stuff on the top of the muffler.
Thread Starter
Safety Car
Joined: Dec 2001
Posts: 4,295
Likes: 2
From: Indianapolis Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Black Crap on Exhaust? (CorvetteSS)
This is a new one on me. I've never had anything but soot on my exhaust tips.
[Modified by BQuicksilver, 8:22 AM 6/28/2003]
Melting Slicks
Joined: Apr 2001
Posts: 2,909
Likes: 1
From: Highland Village TX
Re: Black Crap on Exhaust? (BQuicksilver)
I have Corsa Indies and they always have black soot on them (on the inside of the exhaust tips) after a drive. It is just normal. I clean mine with a spray bottle with water in it and a cloth after they cool down and it just takes a minute. :cheers:
I think this happens more often on after market exhaust systems :D
I think this happens more often on after market exhaust systems :D
Thread Starter
Safety Car
Joined: Dec 2001
Posts: 4,295
Likes: 2
From: Indianapolis Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Black Crap on Exhaust? (2001 Red Coupe Bandit)
I have Corsa Indies and they always have black soot on them (on the inside of the exhaust tips) after a drive. It is just normal. I clean mine with a spray bottle with water in it and a cloth after they cool down and it just takes a minute. :cheers:
I think this happens more often on after market exhaust systems :D
I think this happens more often on after market exhaust systems :D
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Safety Car
Joined: Dec 2001
Posts: 4,295
Likes: 2
From: Indianapolis Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Black Crap on Exhaust? (MMarquez)
If you've drag raced little bits of rubber and VHT can accumulate on top of the mufflers and on the shields above them. :)
Drifting
Joined: Oct 2002
Posts: 1,710
Likes: 0
From: Langhorne PA
Re: Black Crap on Exhaust? (AFVETTE)
If it's exhaust soot that usually means your running rich. That was how my Indy's looked until I had my PCM re-programed.
Dan
PS Sorry, I didn't mean to pirate the thread :)
Thread Starter
Safety Car
Joined: Dec 2001
Posts: 4,295
Likes: 2
From: Indianapolis Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Black Crap on Exhaust? (Dr. Dan)
Everyone listen: I'm not talking about the tips in any way shape or form. When you take off the exhaust there is always a ton of black crap on top of the mufflers. You can only see this with the system totally off the car. :smash:
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: Black Crap on Exhaust? (BQuicksilver)
I know eaxactly what you are referring to.. It drives me nuts...
It mostly shows on the front side of the muffler that faces the rear of the tire..
My guess is it's just little pieces of road tar, rubber from the tires and if you race...VHT..
I use (Purple Degreaser from Home Depot)Careful this stuff is wicked strong and can remove your fingerprints!!!
Then I follow up with a little steel wool....I have even Claybar'd my Corsa Can's (With old claybar of course)
:D
It mostly shows on the front side of the muffler that faces the rear of the tire..
My guess is it's just little pieces of road tar, rubber from the tires and if you race...VHT..
I use (Purple Degreaser from Home Depot)Careful this stuff is wicked strong and can remove your fingerprints!!!
Then I follow up with a little steel wool....I have even Claybar'd my Corsa Can's (With old claybar of course)
:D
Pro
Joined: Dec 2002
Posts: 601
Likes: 0
Re: Black Crap on Exhaust? (chuckster)
It comes from the opening above the muffler in the tirewell and the back of the car form a nice "pocket" to catch all the dirt and roadgime tossed up by the back tires. Unless you get down there and spray water when you wash, I doubt that area even gets wet unless it's driven in the rain.
Racer
Joined: Feb 2002
Posts: 301
Likes: 0
From: El Paso
Re: Black Crap on Exhaust? (BQuicksilver)
Yep, cost cutting shows up there too. I have polished mufflers (B&Bs) that make the job easier, but I crawl under there every once in a while and clean the top of the mufflers as far as I can reach. Doing this often will avoid 'crusting' the mufflers with that crap. My car hasn't seen rain, but when it does, I'll thoroughly wash it asap; that's when it gets 10 times worse.
Good weekend.
JC
Good weekend.
JC
Racer
Joined: Jan 2003
Posts: 266
Likes: 0
From: Folsom CA
Re: Black Crap on Exhaust? (BQuicksilver)
Please read the post. I know soot accumulates on the tips from the engine.
Sorry I can't help on the "black material" issue, but I had to reply when I noticed how many attempts you've made to make people AWARE that you're NOT talking about what's in the pipes. HELLOOO!!!
Amazing isn't it??? Good luck! However, for what it's worth, I replaced my exhaust at around 3,000 miles, and noticed that GM had painted the mufflers black, but that's it. In your neck of the woods, it seems to me that a lot of cars used to have a sprayed on undercoat for sealer & road noise, but that would be all over.
Thread Starter
Safety Car
Joined: Dec 2001
Posts: 4,295
Likes: 2
From: Indianapolis Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Re: Black Crap on Exhaust? (50-50)
Yeah, it's kinda peeve of mine here. I've posted about 20 threads where I swear guys never even read the first post. They just see the title and think they know what I'm asking about. :rolleyes: :mad
Yeah, I was thinking they may have been painted...i'm glad you confirmed that.
Yeah, I was thinking they may have been painted...i'm glad you confirmed that.
Instructor
Joined: Dec 2002
Posts: 181
Likes: 1
From: salt lake city ut
Re: Black Crap on Exhaust? (BQuicksilver)
My mufflers are painted too but most of it is comming off. I don't have any soot in my pipes-wouldn't that be an indication of rich jetting? Maybe if you hosed out your exhaust it wouldn't build up? Have you tried carb cleaner? I've heard of small animals building nests in there-have you tried rat poison? Do you think if you blew compressed air down the air filter you could blow it out of there? :seeya