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

my compression test results

Thread Tools
 
Search this Thread
 
Old Apr 17, 2005 | 03:32 PM
  #1  
DriveATransAm's Avatar
Thread Starter
TECH Junkie
 
Joined: Nov 2001
Posts: 3,029
Likes: 0
From: Chi-Town
Default my compression test results

tested 5 cylinders. all were about 200-210 psi...cept for the cylinder that i think (well, know at this point) is the culprit. 30 psi motor is coming out next weekend to see what the walls look like.
Reply
Old Apr 17, 2005 | 08:36 PM
  #2  
fast98's Avatar
TECH Regular
20 Year Member
iTrader: (16)
 
Joined: Jun 2004
Posts: 483
Likes: 0
From: michigan
Default

did u do a wet compression test? or a cylinder leak down test? i would do those first
Reply
Old Apr 18, 2005 | 10:27 AM
  #3  
SMOKINV8's Avatar
TECH Fanatic
iTrader: (6)
 
Joined: Jan 2002
Posts: 1,193
Likes: 0
From: Springfield, IL
Default

What were your symptoms before you did the test?

There's no point in doing the other tests now, he's verified there's a bad cylinder.
Reply
Old Apr 18, 2005 | 12:22 PM
  #4  
30th droptop's Avatar
TECH Apprentice
20 Year Member
Photogenic
Photoriffic
iTrader: (-1)
 
Joined: Nov 2004
Posts: 308
Likes: 4
Default

It may still be a good idea to do a wet test. It's still possible that the problem is a burned or bent valve, in which case you might not need to pull the engine - just the head(s).

Especially with a number so low, you'd expect it to be a really big leak!
Reply
Old Apr 18, 2005 | 12:56 PM
  #5  
v8maro's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: May 2003
Posts: 1,563
Likes: 0
From: Commerce, MI
Default

or a really big hole in the piston
Reply
Old Apr 18, 2005 | 04:55 PM
  #6  
DriveATransAm's Avatar
Thread Starter
TECH Junkie
 
Joined: Nov 2001
Posts: 3,029
Likes: 0
From: Chi-Town
Default

bad valve prolly wouldnt leak as much air as it does out the oil filler. its be in the exhaust or intake. and at this point it doesnt matter what test i do because the engines gonna come out. ill pull the head off weds and see what shape the cylinder is in.
Reply
Old Apr 24, 2005 | 03:37 PM
  #7  
DriveATransAm's Avatar
Thread Starter
TECH Junkie
 
Joined: Nov 2001
Posts: 3,029
Likes: 0
From: Chi-Town
Default

well i threw some oil in the spark plug hole best i could. mighta picked up 1 psi.
Reply
Old Apr 24, 2005 | 07:56 PM
  #8  
DriveATransAm's Avatar
Thread Starter
TECH Junkie
 
Joined: Nov 2001
Posts: 3,029
Likes: 0
From: Chi-Town
Default

well, pulled the head off...walls dont look too bad. there was definatly something rubbing though by the vertical marks on the walls. it didnt feel too bad so im hopeful that i can just hone and replace the rings.
Reply
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




All times are GMT -5. The time now is 02:19 PM.

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