LS1TECH - Camaro and Firebird Forum Discussion

Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Cracked ringland?

Thread Tools
 
Search this Thread
 
Old Apr 24, 2011 | 11:53 AM
Share
  #1  
mconway68w's Avatar
mconway68w
Thread Starter
11 Second Club
iTrader: (2)
 
Joined: Mar 2009
Posts: 127
Likes: 0
From: Shreveport, LA
Default Cracked ringland?
I've got a missfire in the number 7 cylinder. Compression is only around 90 psi vs 190+ in the others. My first thought is a cracked ringland, but the car does not smoke at all. Just a little rough at idle. It is FI so I know this is a typical breaking point. Can I have a cracked ringland with compression that low but no smoking? I'm hoping it's just an issue in the valvetrain.
Reply
0
Old Apr 24, 2011 | 12:59 PM
Share
  #2  
Fastdriver1992's Avatar
Fastdriver1992
TECH Apprentice
iTrader: (1)
 
Joined: May 2009
Posts: 388
Likes: 0
Default
Originally Posted by mconway68w
I've got a missfire in the number 7 cylinder. Compression is only around 90 psi vs 190+ in the others. My first thought is a cracked ringland, but the car does not smoke at all. Just a little rough at idle. It is FI so I know this is a typical breaking point. Can I have a cracked ringland with compression that low but no smoking? I'm hoping it's just an issue in the valvetrain.
yes you could. i had alot of smoke coming out of my breather on my motor(carburated) but yours might not b blowing smoke because u have the pcv hooked up to the intake manifold and its sucking in all the smoke from the blowby
Reply
0
Old Apr 24, 2011 | 01:43 PM
Share
  #3  
mconway68w's Avatar
mconway68w
Thread Starter
11 Second Club
iTrader: (2)
 
Joined: Mar 2009
Posts: 127
Likes: 0
From: Shreveport, LA
Default
Gotcha, what about exhuast smoke? I'm not seeing any there either.
Reply
0
Old Apr 24, 2011 | 01:47 PM
Share
  #4  
Fastdriver1992's Avatar
Fastdriver1992
TECH Apprentice
iTrader: (1)
 
Joined: May 2009
Posts: 388
Likes: 0
Default
Originally Posted by mconway68w
Gotcha, what about exhuast smoke? I'm not seeing any there either.
i never saw exhaust smoke on my car
Reply
0
Old Apr 24, 2011 | 03:03 PM
Share
  #5  
theevette's Avatar
theevette
On The Tree
iTrader: (2)
 
Joined: Jul 2008
Posts: 152
Likes: 0
Default
Broke valve spring maybe burnt valve
Reply
0
Old Apr 24, 2011 | 03:44 PM
Share
  #6  
c0ncEpT's Avatar
c0ncEpT
TECH Fanatic
iTrader: (4)
 
Joined: Apr 2005
Posts: 1,514
Likes: 1
From: Shelby twp, MI
Default
Whats the plug look like?

Take the oil cap off. If the car is puffing a decent amount of smoke out of it while running you more than likely have a broken ringland.
Reply
0
Old Apr 24, 2011 | 05:42 PM
Share
  #7  
mconway68w's Avatar
mconway68w
Thread Starter
11 Second Club
iTrader: (2)
 
Joined: Mar 2009
Posts: 127
Likes: 0
From: Shreveport, LA
Default
Haven't looked yet, but I guess the plug would look wet if it's cracked?
Reply
0

Trending Topics

Old Apr 24, 2011 | 06:23 PM
Share
  #8  
DoubleK's Avatar
DoubleK
Teching In
iTrader: (2)
 
Joined: Sep 2007
Posts: 22
Likes: 0
Default
I had the somewhat common #7 piston come apart on me last year (portion of the top ringland coming apart). I drove the car home 30 miles from the track with alot of misfiring, but no smoke whatsoever. When i finally took it apart, a 1/4 of the top of the piston was gone, i could actually see the top ring.

Also had a friend break the ringlands on #8 with very minimal smoking.
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Apr 24, 2011 | 07:20 PM
Share
  #9  
mconway68w's Avatar
mconway68w
Thread Starter
11 Second Club
iTrader: (2)
 
Joined: Mar 2009
Posts: 127
Likes: 0
From: Shreveport, LA
Default
$#!+ ... Guess i'm gonna burn it to the ground.
Reply
0
Old Apr 24, 2011 | 08:51 PM
Share
  #10  
c0ncEpT's Avatar
c0ncEpT
TECH Fanatic
iTrader: (4)
 
Joined: Apr 2005
Posts: 1,514
Likes: 1
From: Shelby twp, MI
Default
Originally Posted by mconway68w
Haven't looked yet, but I guess the plug would look wet if it's cracked?
Most the time the plug is destroyed as the piece of piston likes to bang around before it leaves combustion chamber.

Start it and take the oil cap off. That is a tell tale sign.
Reply
0
Tags
Back to Subforum
Generation III Internal Engine
View Next Unread
6.0 swap trouble. Please help




Advanced Search

All times are GMT -5. The time now is 05:22 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE