Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

Black deposits ejected out of exhaust

Old Jan 29, 2013 | 11:00 AM
  #1  
Chuck84TA's Avatar
Thread Starter
Senior Member
 
Joined: May 2012
Posts: 582
Likes: 1
From: Woodstock, IL
Car: 1984 Trans Am Recaro Edition
Engine: 355 L98 Vortec 226/234 custom cam
Transmission: TKO-600
Axle/Gears: On borrowed time...
Black deposits ejected out of exhaust

Attachment 253145

Here are some pics...
Just started the car after about a month... But this has happened before..
Black oily like deposits shoot out of the exhaust ...

Is this a sign of a leaky exhaust manifold gasket or some other gasket thingy somewhere ?

Chuck
Attached Thumbnails Black deposits ejected out of exhaust-image.jpg  
Reply
Old Jan 29, 2013 | 11:22 AM
  #2  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,754
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Black deposits ejected out of exhaust

your running rich
Reply
Old Jan 29, 2013 | 11:27 AM
  #3  
David 91RS/Z28's Avatar
Senior Member
 
Joined: Jul 1999
Posts: 558
Likes: 0
From: Baton Rouge, LA USA
Re: Black deposits ejected out of exhaust

It's most likely some condensation that is getting spit out.
Reply
Old Jan 29, 2013 | 11:30 AM
  #4  
kitt23's Avatar
Member
iTrader: (4)
 
Joined: May 2010
Posts: 196
Likes: 2
Re: Black deposits ejected out of exhaust

Carbon deposits ....running rich
Reply
Old Jan 29, 2013 | 11:31 AM
  #5  
TTOP350's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (9)
 
Joined: Oct 2001
Posts: 12,219
Likes: 1,141
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Black deposits ejected out of exhaust

Its a lil rich, a lil condensation, a lil oil and maybe some small exhaust parts of exhaust rust.
Reply
Old Jan 29, 2013 | 11:32 AM
  #6  
sonjaab's Avatar
On Probation
15 Year Member
Liked
 
Joined: Apr 2007
Posts: 1,592
Likes: 18
From: Syracuse NY
Car: 84 Z-28
Engine: 305 HO
Transmission: r-700
Axle/Gears: 3:73
Re: Black deposits ejected out of exhaust

Thats common......................

Its just carbon/exaust staining mixed with condensation inside your exaust pipes
esp. on a older car till its fully warmed up to operating temp. and burned off.

I see it on my old Z or GTO on initial cold starts.

Now if it does it after the car is hot and up to temp along with smoke I
would be concerned and investigate further.
Reply
Old Jan 29, 2013 | 12:01 PM
  #7  
Chuck84TA's Avatar
Thread Starter
Senior Member
 
Joined: May 2012
Posts: 582
Likes: 1
From: Woodstock, IL
Car: 1984 Trans Am Recaro Edition
Engine: 355 L98 Vortec 226/234 custom cam
Transmission: TKO-600
Axle/Gears: On borrowed time...
Re: Black deposits ejected out of exhaust

Thanks!!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
1992 Trans Am
History / Originality
27
May 10, 2023 07:19 PM
Vintageracer
Camaros for Sale
12
Jan 10, 2020 05:33 PM
69 Six Pack
Camaros for Sale
13
Oct 5, 2015 07:51 PM
Thornburg
Transmissions and Drivetrain
10
Aug 25, 2015 01:46 AM
Feffman
Mid-West Region
0
Aug 13, 2015 07:12 AM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 10:00 AM.