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

Cracked block?

Thread Tools
 
Search this Thread
 
Old Sep 22, 2007 | 12:41 AM
  #1  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default Cracked block?

As I was reassembling my motor, I began to tighten down the head bolts, and they got hard to turn, and then the pressure relieved and they turned fine, and it made a small vaacum sound. And a small amount of coolant started to come out of the side of the block(very small). It has come to my attention that it may/probably is cracked.

Is this for sure? If so, how do I fix this, aside from replacing the block.
Reply
Old Sep 22, 2007 | 12:42 AM
  #2  
JMBLOWNWS6's Avatar
9 Second Club
iTrader: (17)
 
Joined: Nov 2002
Posts: 4,997
Likes: 0
From: New Braunfels ,Tx
Default

Well it sound like you compressed water in the threads and cracked the block. No fix for it. Its junk now.
Reply
Old Sep 22, 2007 | 01:02 AM
  #3  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

What would happen if I were to run the motor like this?
Reply
Old Sep 22, 2007 | 01:28 AM
  #4  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

No one knows? Uggggh.
Reply
Old Sep 22, 2007 | 01:30 AM
  #5  
JMBLOWNWS6's Avatar
9 Second Club
iTrader: (17)
 
Joined: Nov 2002
Posts: 4,997
Likes: 0
From: New Braunfels ,Tx
Default

I personally would not run the block.
Reply
Old Sep 22, 2007 | 01:31 AM
  #6  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

Well, my car has been off the road for a while. And my parents want to sell it to a junkyard! If I tell them my block is cracked and I need to buy a new one....I will probably lose the car.

So....what is the worst that will happen if I put the block in the car?
Reply
Old Sep 22, 2007 | 01:32 AM
  #7  
JMBLOWNWS6's Avatar
9 Second Club
iTrader: (17)
 
Joined: Nov 2002
Posts: 4,997
Likes: 0
From: New Braunfels ,Tx
Default

Why dont you do me a favor and take a pic of where this happened.
Reply
Old Sep 22, 2007 | 01:35 AM
  #8  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

I will do it tomorrow. No where that it went into a cylinder wall. Just coolant passage if anything. It is soooo small. I looked at it with a flashlight and couldn't see a crack, so it's tiny...it's literally a pin hole.

My motor is out of the car by the way. I will have a pic tomorrow....
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

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

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Sep 22, 2007 | 01:36 AM
  #9  
JMBLOWNWS6's Avatar
9 Second Club
iTrader: (17)
 
Joined: Nov 2002
Posts: 4,997
Likes: 0
From: New Braunfels ,Tx
Default

Either way when you pressurize the cooling system its going to leak. If you want to you can JB weld it!
Reply
Old Sep 22, 2007 | 01:43 AM
  #10  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

Well honestly....what can I do.....
Reply
Old Sep 22, 2007 | 01:45 AM
  #11  
JMBLOWNWS6's Avatar
9 Second Club
iTrader: (17)
 
Joined: Nov 2002
Posts: 4,997
Likes: 0
From: New Braunfels ,Tx
Default

Originally Posted by blueeyeddevil141
Well honestly....what can I do.....
Sucks what happened. I would need to see a pic of the crack. But the odds are against you. Hopefully Im wrong and its nothing and you can keep your car.
Reply
Old Sep 22, 2007 | 01:47 AM
  #12  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

Well, I am telling you now....from a picture, you won't see anything. In person I can't even see it! Just curious what to expect...if I do run the motor this way, what will happen?
Reply
Old Sep 22, 2007 | 01:49 AM
  #13  
JMBLOWNWS6's Avatar
9 Second Club
iTrader: (17)
 
Joined: Nov 2002
Posts: 4,997
Likes: 0
From: New Braunfels ,Tx
Default

Originally Posted by blueeyeddevil141
Well, I am telling you now....from a picture, you won't see anything. In person I can't even see it! Just curious what to expect...if I do run the motor this way, what will happen?
It WILL loose coolant and overheat.
Reply
Old Sep 22, 2007 | 01:52 AM
  #14  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

I can deal with that. hahah. Ugh, this sucks.....It can't be like tig welded since it's a pin hole?
Reply
Old Sep 22, 2007 | 11:05 AM
  #15  
Lt1Porsche's Avatar
TECH Resident
20 Year Member
iTrader: (6)
 
Joined: May 2005
Posts: 795
Likes: 2
From: Midlothian, Virginia
Default

So you have a pin hole that you cannot see, dont know where it is. I would take the block and have is magnafluxed and checked for cracks. If there is a pin hole that is leaking. I would NOT run that motor.
Reply
Old Sep 22, 2007 | 11:10 AM
  #16  
blueeyeddevil141's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Sep 2006
Posts: 822
Likes: 0
From: Long Island, NY
Default

I know what would normally be the right thing to do...but my parents want my car gone already....so I really have no choice.
Reply
Old Sep 22, 2007 | 01:54 PM
  #17  
lmt0705's Avatar
TECH Fanatic
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (7)
 
Joined: Apr 2006
Posts: 1,709
Likes: 3
From: buffalo NY
Default

jb weld the area. what have you got to loose? i used it to fix a cracked block on a diesel a few years ago and its still holding
Reply
Old Sep 22, 2007 | 02:38 PM
  #18  
ZZebes's Avatar
TECH Junkie
iTrader: (10)
 
Joined: Feb 2007
Posts: 3,111
Likes: 0
Default

JB weld that bitch and pray
Reply
Old Sep 22, 2007 | 03:29 PM
  #19  
Tainted's Avatar
TECH Senior Member
iTrader: (9)
 
Joined: Mar 2006
Posts: 8,425
Likes: 2
From: Indianapolis
Default

if tis trely as small as you say you could probably have it welded or jb welded
Reply
Old Sep 22, 2007 | 03:31 PM
  #20  
Lt1Porsche's Avatar
TECH Resident
20 Year Member
iTrader: (6)
 
Joined: May 2005
Posts: 795
Likes: 2
From: Midlothian, Virginia
Default

yea you can use JB weld just make sure that the area is VERY VERY clean. The cleaner the better chance you have of it holding up.
Reply



All times are GMT -5. The time now is 05:56 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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