LT1-LT4 Modifications 1993-97 Gen II Small Block V8

dropped a valve,is this real bad

Thread Tools
 
Search this Thread
 
Old Feb 19, 2009 | 10:12 AM
  #21  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Originally Posted by rspears9
my friend just called,they hand turn the engine and got valve back up,put new spring,they had to get another pushrod,and roller rocker,installed those parts and car runs like a charm.i prayed all night to god,and so far looks like it helped.
Well are you sure your valve stem is not bent at all, causing uneven wear on your valve seat? Are you sure your piston isn't scared and will eventually melt? Are you sure your cylinder isn't scored, causing ring damage or blowby? There is a lot of variable that you are over looking by just slapping on another spring and going about your day. Did you at least consider checking/replacing any of the other springs so that something like this won't happen again?

Last edited by ss.slp.ls1; Feb 19, 2009 at 10:37 AM.
Reply
Old Feb 19, 2009 | 10:24 AM
  #22  
koolaid_kid's Avatar
TECH Junkie
iTrader: (21)
 
Joined: Jul 2005
Posts: 3,023
Likes: 1
From: Indianapolis
Default

Originally Posted by Puck
Are you serious? I would NOT trust an engine that dropped a valve while running.
Think about what was going on inside that cylinder as the piston was traveling hundreds of feet per second with a valve inside it.
I gotta go with Puck and ss.slp.ls1. At the very least, I would pull the head and check everything out. It's just inexpensive insurance.
Reply
Old Feb 19, 2009 | 10:27 AM
  #23  
rspears9's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2008
Posts: 53
Likes: 0
Default dropped valve,good news fixed it

i had already 4 springs break,and i new what the sound was,i pulled car over and shut it down fast,and then called a wrecker to haul it to my friends shop,i believe they inspected everything and said car runs like a charm and idles smooth as silk.
Reply
Old Feb 19, 2009 | 10:38 AM
  #24  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Originally Posted by rspears9
i had already 4 springs break,and i new what the sound was,i pulled car over and shut it down fast,and then called a wrecker to haul it to my friends shop,i believe they inspected everything and said car runs like a charm and idles smooth as silk.
You believe?
How did they inspect it? Did they pull the springs and test the spring pressures?
Reply
Old Feb 19, 2009 | 10:47 AM
  #25  
rspears9's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2008
Posts: 53
Likes: 0
Default dropped valve,good news fixed it

they are installing all new springs,and then they are going to pull the head to make sure.
Reply
Old Feb 19, 2009 | 10:53 AM
  #26  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Originally Posted by rspears9
they are installing all new springs,and then they are going to pull the head to make sure.
Now that sounds better...
Reply
Old Feb 19, 2009 | 10:56 AM
  #27  
connexion2005's Avatar
12 Second Club
iTrader: (49)
 
Joined: May 2006
Posts: 966
Likes: 0
From: College Station, Texas
Default

What springs are on that motor? Are they 918's from comp?
Reply
Old Feb 19, 2009 | 10:56 AM
  #28  
Camaro Jearmy's Avatar
On The Tree
 
Joined: Mar 2005
Posts: 171
Likes: 0
From: Missouri
Default

Originally Posted by rspears9
they are installing all new springs,and then they are going to pull the head to make sure.
you should buy a lottery ticket if nothing internal is messed up. Hard to believe the valve isn't bent, should do a leak down test. Wouldn't it be easier to change the springs after the heads off?
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
Old Feb 19, 2009 | 10:58 AM
  #29  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

Originally Posted by rspears9
my friend just called,they hand turn the engine and got valve back up,put new spring,they had to get another pushrod,and roller rocker,installed those parts and car runs like a charm.i prayed all night to god,and so far looks like it helped.
Originally Posted by rspears9
i had already 4 springs break,and i new what the sound was,i pulled car over and shut it down fast,and then called a wrecker to haul it to my friends shop,i believe they inspected everything and said car runs like a charm and idles smooth as silk.
Originally Posted by rspears9
they are installing all new springs,and then they are going to pull the head to make sure.
Something smells fishy.

They put on new parts, started it up and it ran like a charm, but they're going to pull the head anyway? You got some ***-backwards friends.
Reply
Old Feb 19, 2009 | 04:51 PM
  #30  
rspears9's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2008
Posts: 53
Likes: 0
Default dropped valve,good news fixed it

well i found out something guys,the reason there was no damage was that the valve didnt drop all the ways out.it was still in the valve slot,it was pushed about flushed,when they got under the car and turned the engine,the valve pushed rest the way up.so i guess it didnt drop out,im still lucky.the guy that built the engine said when the valve drops in the piston he said it destroys everything in its path,he said it was a 1 in a million that one will

stays in its slot.but im very happy.save me some serious money.thanks to all for your help and comments,i can always count on you guys giving info.the springs that they installed to day was good for a cam up to 600 lift

Last edited by rspears9; Feb 19, 2009 at 04:54 PM. Reason: left out
Reply
Old Feb 19, 2009 | 06:20 PM
  #31  
Formula350's Avatar
TECH Senior Member
iTrader: (3)
 
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
Default

Well, I'd still pull the head.

I'm just curious as to why the engine came to a grinding halt if nothing is wrong. It's not like the engine can't still turn over while making compression, but maybe it's the extra cylinder that is making compression that did it *shrug*
Reply
Old Feb 19, 2009 | 08:18 PM
  #32  
rspears9's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2008
Posts: 53
Likes: 0
Default dropped valve,good news fixed it

the car didnt come to a halt,i was driving it and heard the noise so i pulled over and the engine died,they said the noise i heard was the roller rocker when it came off.

Last edited by rspears9; Feb 19, 2009 at 08:23 PM. Reason: left out
Reply
Old Feb 19, 2009 | 08:32 PM
  #33  
Formula350's Avatar
TECH Senior Member
iTrader: (3)
 
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
Default

So how long did it run before it 'shut down'. And I didn't mean "grinding" literally, just a figure of speech.
Reply
Old Feb 21, 2009 | 05:40 PM
  #34  
rspears9's Avatar
Thread Starter
Staging Lane
 
Joined: Apr 2008
Posts: 53
Likes: 0
Default dropped valve,good news fixed it

it ran for 1 to 2 minutes if that long
Reply
Old Feb 21, 2009 | 05:47 PM
  #35  
phirepower's Avatar
TECH Resident
iTrader: (2)
 
Joined: Nov 2006
Posts: 958
Likes: 0
From: Mass
Default

please supply pics of miracle motor
Reply
Old Feb 21, 2009 | 08:29 PM
  #36  
Camaro Jearmy's Avatar
On The Tree
 
Joined: Mar 2005
Posts: 171
Likes: 0
From: Missouri
Default

Originally Posted by rspears9
it ran for 1 to 2 minutes if that long
@ 1 minute - a minimum of 1000 revolutions that motor made and didn't harm anything? Un-real.
Reply
Old Feb 21, 2009 | 08:42 PM
  #37  
Formula350's Avatar
TECH Senior Member
iTrader: (3)
 
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
Default

Originally Posted by phirepower
please supply pics of miracle motor
I have to agree with him on this one lol At anything over 5seconds you're going to want to contact the Guinness Book of World Records. But honestly, I'd love to see inside that cylinder, even if it was through a boroscope!
Reply
Old Feb 22, 2009 | 01:24 AM
  #38  
ss.slp.ls1's Avatar
TECH Senior Member
15 Year Member
iTrader: (36)
 
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Default

Originally Posted by phirepower
please supply pics of miracle motor
Reply
Old Feb 22, 2009 | 10:18 AM
  #39  
Formula350's Avatar
TECH Senior Member
iTrader: (3)
 
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
Default

We may have to rethink the LS1 being touched by god lol Maybe he'll see Jesus in the valve indentations on the piston
Reply




All times are GMT -5. The time now is 07:32 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