Tonights Carnage!
Tonights Carnage! Piston pics updated Ok so i was doing a burnout tonight car died and wont even turn over anymore. Here is a video...
http://www.fast-ta.com/videos/gir782005.wmv
and some pics of a plug out of #5. I pulled all the drivers side plugs.. 5 is the only one with visible damage. In the box I got 15 degrees of knock retard according to the data log.
Any ideas what im looking at? Looks to me like something hit that plug. Bottom end toast?
http://www.fast-ta.com/videos/gir782005.wmv
and some pics of a plug out of #5. I pulled all the drivers side plugs.. 5 is the only one with visible damage. In the box I got 15 degrees of knock retard according to the data log.
Any ideas what im looking at? Looks to me like something hit that plug. Bottom end toast?
Last edited by White2000TA; Jul 10, 2005 at 01:07 PM.
Ouch!
Looks like it started as top end damage, may have introduced Mr. Piston to Mr. valve . Might have something to do with that missed shift 
Looks like it started as top end damage, may have introduced Mr. Piston to Mr. valve
. Might have something to do with that missed shift Last edited by ssheets; Jul 9, 2005 at 04:20 AM.
Dont think I was missing shifts last night. Transmission seemed fine. Checked all the other plugs and they all seem fine. Starter wont turn the engine at all even with the plugs out 
Im hoping its bottom end. I just put a ton of $$$ into a new set of AFR 205s and a g5x3 cam.
Im hoping its bottom end. I just put a ton of $$$ into a new set of AFR 205s and a g5x3 cam.
Originally Posted by White2000TA
Dont think I was missing shifts last night. Transmission seemed fine. Checked all the other plugs and they all seem fine. Starter wont turn the engine at all even with the plugs out Im hoping its bottom end. I just put a ton of $$$ into a new set of AFR 205s and a g5x3 cam.
Im hoping its bottom end. I just put a ton of $$$ into a new set of AFR 205s and a g5x3 cam.Trending Topics
Valve hit piston, valve stem bent, valve failed to reseat, piston hit valve again, again, again....you get the picture. As a result of multiple contacts with valve compressing it against the head, piston broke. Without piston to hold connecting rod in place, the rod flailed around until it dug into the cylinder wall and locked the engine up.
Hope the burn-out was worth it, I'm afraid there's not much good news for you here.
Hope the burn-out was worth it, I'm afraid there's not much good news for you here.
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Originally Posted by Guy2626c
what would have caused the valve to hit the piston in the first place? as in what could have been done to prevent this?
You might not realize it yet but you just entered the market for a new stroker (383,402, etc).
What you will find inside will NOT be pretty. You can also count on your new heads needing some valves, a clean up cut on the deck, possibly some welding (unfortunately) in the combustion chamber of #5 and maybe having to replace one or both of the valve seats in that chamber. If the one head is pretty bad you should consider just replacing the bare ported casting.
Did you notch the factory pistons for the cam you were running?....If not, a missed shift would guarantee valves hitting pistons and possibly the start of a chain of events leading to the demise of the short. Your cam might even be bent, nicked, etc...
Good luck....you might get lucky and still have some salvagable parts, but prepare yourself for the worst, because looking at the pics that would be more expected.
Call me at AFR if you need some help regarding the heads....
Tony M.
What you will find inside will NOT be pretty. You can also count on your new heads needing some valves, a clean up cut on the deck, possibly some welding (unfortunately) in the combustion chamber of #5 and maybe having to replace one or both of the valve seats in that chamber. If the one head is pretty bad you should consider just replacing the bare ported casting.
Did you notch the factory pistons for the cam you were running?....If not, a missed shift would guarantee valves hitting pistons and possibly the start of a chain of events leading to the demise of the short. Your cam might even be bent, nicked, etc...
Good luck....you might get lucky and still have some salvagable parts, but prepare yourself for the worst, because looking at the pics that would be more expected.
Call me at AFR if you need some help regarding the heads....
Tony M.
dude, unfortunately, i was in your shoes in november and though it did clean the way to a new 408ci! like tony said, expect to see her in bad shape. Dont get discouraged and do something rash like get rid of her, take your time and in a way, it failed on you for a reason..right?
Good luck bra...keep us posted on the new monster!!! or wat every you decide...maybe a low comp. force induction monster hmmm? forged 347 maybe?
Good luck bra...keep us posted on the new monster!!! or wat every you decide...maybe a low comp. force induction monster hmmm? forged 347 maybe?
Originally Posted by Tony Mamo @ AFR
You might not realize it yet but you just entered the market for a new stroker (383,402, etc).
What you will find inside will NOT be pretty. You can also count on your new heads needing some valves, a clean up cut on the deck, possibly some welding (unfortunately) in the combustion chamber of #5 and maybe having to replace one or both of the valve seats in that chamber. If the one head is pretty bad you should consider just replacing the bare ported casting.
Did you notch the factory pistons for the cam you were running?....If not, a missed shift would guarantee valves hitting pistons and possibly the start of a chain of events leading to the demise of the short. Your cam might even be bent, nicked, etc...
Good luck....you might get lucky and still have some salvagable parts, but prepare yourself for the worst, because looking at the pics that would be more expected.
Call me at AFR if you need some help regarding the heads....
Tony M.
What you will find inside will NOT be pretty. You can also count on your new heads needing some valves, a clean up cut on the deck, possibly some welding (unfortunately) in the combustion chamber of #5 and maybe having to replace one or both of the valve seats in that chamber. If the one head is pretty bad you should consider just replacing the bare ported casting.
Did you notch the factory pistons for the cam you were running?....If not, a missed shift would guarantee valves hitting pistons and possibly the start of a chain of events leading to the demise of the short. Your cam might even be bent, nicked, etc...
Good luck....you might get lucky and still have some salvagable parts, but prepare yourself for the worst, because looking at the pics that would be more expected.
Call me at AFR if you need some help regarding the heads....
Tony M.
Tony, I will prob be in contact with you for any work on the head.
Thanks,
Mike
Originally Posted by CharlieLed
Valve hit piston, valve stem bent, valve failed to reseat, piston hit valve again, again, again....you get the picture. As a result of multiple contacts with valve compressing it against the head, piston broke. Without piston to hold connecting rod in place, the rod flailed around until it dug into the cylinder wall and locked the engine up.
Hope the burn-out was worth it, I'm afraid there's not much good news for you here.
Hope the burn-out was worth it, I'm afraid there's not much good news for you here.
Nice Diag!!!
That sucks.
Had a freind do the same thing during a race last month.
Block = garbage
Cam = garbage
Crank = garbage
Heads = needed valve job, slight mill, and 6 new valves.
oil pan = cracked and garbage
Timing chain was good, Intake and TB were fine, oil pump was okay and thats about it.
I would start looking into a new shortblock and get those heads fixed.
You need to figure out a budget and go from there.
Extra cubes is great but when pricing dont forget head gaskets, oil pan gasket, Heads bolts unless yours are reuseable, new cam, price to fix the heads, plugs, Bigger headers if you go 400+ cubes, 225 AFR;s instead of 205's if you go bigger cubes, etc.
Good luck.
Had a freind do the same thing during a race last month.
Block = garbage
Cam = garbage
Crank = garbage
Heads = needed valve job, slight mill, and 6 new valves.
oil pan = cracked and garbage
Timing chain was good, Intake and TB were fine, oil pump was okay and thats about it.
I would start looking into a new shortblock and get those heads fixed.
You need to figure out a budget and go from there.
Extra cubes is great but when pricing dont forget head gaskets, oil pan gasket, Heads bolts unless yours are reuseable, new cam, price to fix the heads, plugs, Bigger headers if you go 400+ cubes, 225 AFR;s instead of 205's if you go bigger cubes, etc.
Good luck.
j/k