Car went boom....
Car went boom.... 
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[/IMG] and this with "normal" driving...
motor had maybe 2K on it...I am thinking it was the "tune" or lack there of.. i was told it was the springs.. However they are in tact..
Your thoughts??
Car was surging @ idle in both park/drive... Did not surge @ all when i dropped it off..
Oh well... "pay to play" i guess....
Joined: Apr 2006
Posts: 3,929
Likes: 1,160
From: Grand Rapids, Michigan
Dropped a valve from what it looks like. If you have stock valves that's always a possibility. I can't imagine that stock valves won't have some defects a certain percentage of the time.
Originally Posted by 2xLS1
Can you give some details on the cam, heads, and valvesprings that were on the car?
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if detonation caused this,you would think the driver would hear it detonating,if mine does i can hear it loud and clear over my gmmg.And i can look at my scanner and see it appear as i hear it.sorry to hear about the motor
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thats a droped valve.. no sign of det. on the piston (whats left of it) and the ringlands are still intact..so i vote for a valve related issue..possible p\v clearance problem maybe? was the cam installed dot to dot? i would check that as well..and this is just my .02
Originally Posted by Cop Car
cam was installed wrong. ran a valve into a piston
To the original poster, what brand were the heads and do you know what brand valves were used? It looks like the head of the exhaust valve broke off. You can still see the stem in the guide. Is the intake stem still in the guide too? It's hard to tell in the picture.
Originally Posted by 2xLS1
Then all the cylinders would be damaged, not just 1.
To the original poster, what brand were the heads and do you know what brand valves were used? It looks like the head of the exhaust valve broke off. You can still see the stem in the guide. Is the intake stem still in the guide too? It's hard to tell in the picture.
To the original poster, what brand were the heads and do you know what brand valves were used? It looks like the head of the exhaust valve broke off. You can still see the stem in the guide. Is the intake stem still in the guide too? It's hard to tell in the picture.
Originally Posted by 1slow01Z71
Not necessarily, there are deck variences that could have cause that. When I built my motor there was about a .006 range between all the pistons.
Originally Posted by redtail2426
if detonation caused this,you would think the driver would hear it detonating,if mine does i can hear it loud and clear over my gmmg.And i can look at my scanner and see it appear as i hear it.sorry to hear about the motor
Originally Posted by 66deuce
sometimes by the time your hear the detonation,it's already too late...
True, but do that type of damage or even remotley close to, you have to detonate EXTREMLEY hard, none the less the piston show line-like contact marks that spell valve all the way. I dropped a valve on my then turbo Integra at ~8800rpm, the carnage was awfull similar to what you see here.
My condolences to the owner
Originally Posted by PewterY2KZ28
and this with "normal" driving...
motor had maybe 2K on it...I am thinking it was the "tune" or lack there of.. i was told it was the springs.. However they are in tact..
Your thoughts??
Car was surging @ idle in both park/drive... Did not surge @ all when i dropped it off..
Oh well... "pay to play" i guess....
Last edited by orangeapeel; Nov 26, 2006 at 10:01 PM.
I am going to go for the dropped valve as you would think someone would check clearances before building a motor.
I would see it being a variance in the head or such but you don't think it would cause that damage. Maybe just a dent. I have had a valve dent a piston before due to a clearance issue and it didn't do that much damage. Just barely touched it.
I would see it being a variance in the head or such but you don't think it would cause that damage. Maybe just a dent. I have had a valve dent a piston before due to a clearance issue and it didn't do that much damage. Just barely touched it.
