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Posted: 8/31/2015 5:22:45 PM EDT
Always verify that the piston reliefs match the valve that goes into them!
A total of 4 pistons were incorrectly installed on this motor. It ran fine through initial firing, then blew once cruising on the road at 2,700 rpm. One piston ate an intake valve and blew chunks back through the manifold, which then scored the shit out of the other cylinders. Yes, the machine shop paid to build me a completely new engine. 
Background info: This happened 10 years ago and the shop went out of business a few months later. I came across the piston while rummaging through some stuff in the basement this morning. Engine is a Chrysler 340 stroked to 418. |
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Posted: 8/31/2015 5:27:25 PM EDT
[#1]
That's pretty cool. I believe Car Craft has a monthly photo contest of fuck ups like that. Should forward that picture to them.
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Posted: 8/31/2015 5:35:17 PM EDT
[#2]
Out of a Chrysler 340, ouch.
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Posted: 8/31/2015 5:37:37 PM EDT
[#3]
(Knock on wood)
I've never had a motor let go due to an 'error'* Double, then triple check all tolerances. Including clayed piston crown valve relief mock-ups Also includes degreeing any/all camshafts Valvetrain geometry, blah blah blah..... * excludes the 'error' of a missed shift 
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Posted: 8/31/2015 5:38:21 PM EDT
[#4]
Who in their right mind builds a stroker motor and doesn't at least clay the damn pistons and valves. I guess that's why they went out of business.
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Posted: 8/31/2015 5:39:45 PM EDT
[#5]
Thats a wall hanger for sure.
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Posted: 8/31/2015 5:40:36 PM EDT
[#6]
Been there, done that.
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Posted: 8/31/2015 5:44:38 PM EDT
[#7]
I had a piston eat a value on a straight 6 because a 40 cent keeper . still have the value it cured to an almost perfect ring. piston was gone . was able to sleeve that cylinder . head didn't fair so well...... had to replace that.
I remember Dale Sr. losing a Daytona 500 because of a rotor cap. and going on about a 100 grand motor and the least expensive part is the one that failed. |
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Posted: 8/31/2015 5:46:24 PM EDT
[#8]
reminds me of highschool small engine shop..
guy brought in the family lawn mower and did what ever he did.. brought it out back of the shop for it's test run.... started great....but it kept getting faster and faster... then BANG put the crank right through the case.
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Posted: 8/31/2015 5:47:40 PM EDT
[#9]
That sucks OP, but sounds like the shop will do right by you
I've had my share of minor screw-ups, and I have to cuss out the guy in the mirror for causing them
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Posted: 8/31/2015 5:48:58 PM EDT
[#10]
Suspend that in a clear resin block for a kick ass paper weight
Sucks other wise |
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Posted: 8/31/2015 5:49:25 PM EDT
[#11]
Ouch!
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Posted: 8/31/2015 5:49:31 PM EDT
[#12]
Looks like it was beating itself around inside the cylinder before it impaled itself in to the piston. Bet that made a bang. How had are the cyl head chambers? Heads saveable?
EDIT: nvm. I see its really old news. |
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Posted: 8/31/2015 5:50:16 PM EDT
[#13]
Yep, pistons and valves don't like to kiss. Have seen it a lot on big diesel engines.
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Posted: 8/31/2015 5:55:16 PM EDT
[#15]
We were breaking an engine in for the race car once
It was singing along nicely then all of the sudden, blub blub blub blub Ran into the garage to water pouring out a header Broke a valve and cracked the block. Don't know exactly what happened That block got sleeved and put into my 4x4 |
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Posted: 8/31/2015 5:56:05 PM EDT
[#16]
Quote HistoryQuoted: Out of a Chrysler 340, ouch. No kidding. It isn't like they grow on trees. |
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Posted: 8/31/2015 5:56:08 PM EDT
[#17]
I dropped a keeper on a 455 olds at about 3500 rpm, valve and piston pieces everywhere.
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Posted: 8/31/2015 5:59:48 PM EDT
[#18]
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Posted: 8/31/2015 6:00:22 PM EDT
[#19]
SBC turning around 7400 when we discovered the machine shop didn't weld a weight they used to balance the crank. Basically had metal rod sticking out the side of the crank at 7400 eating everything in it's path.
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Posted: 8/31/2015 6:00:33 PM EDT
[#20]
Quote HistoryQuoted:
No kidding. It isn't like they grow on trees. Quote HistoryQuoted:
Quoted:
Out of a Chrysler 340, ouch. No kidding. It isn't like they grow on trees. Well........they used to until everyone kept destroying them.... 
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Posted: 8/31/2015 6:13:38 PM EDT
[#21]
I killed a 427 windsor stroker in the waterbox at the track.
Best we can tell it was a couple failed injectors. 
Beat up one of the dart heads pretty good. 
After some clean up and tig work the machine shop shaved it IIRC about 7 thou. They said the tig work looked very pro.
The monkey running the tig is far from a pro. 
A new set of pistons was all that was needed, But it was decided to de-stroke it to a 413 with a new crank, rods and pistons. Even after de-stroking the motor it is faster at the track than the 427 ever was. But I miss the ungodly torque it had, And it is still no slouch on torque. 
Listen to the death rattle.
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Posted: 8/31/2015 6:16:35 PM EDT
[#22]
Crazy, just enough to break it.
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Posted: 8/31/2015 6:22:25 PM EDT
[#23]
get back to me when you do this, none of the internal parts failed, the block just split in half
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Posted: 8/31/2015 6:41:42 PM EDT
[#24]
Quote HistoryJB weld would fix that small mishap |
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Posted: 8/31/2015 6:42:22 PM EDT
[#25]
Quote HistoryQuoted:
That sucks OP, but sounds like the shop will do right by you I've had my share of minor screw-ups, and I have to cuss out the guy in the mirror for causing them Will do?... this happened 10 years ago. |
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Posted: 8/31/2015 6:44:48 PM EDT
[#26]
Quote HistoryQuoted:
I killed a 427 windsor stroker in the waterbox at the track.
Best we can tell it was a couple failed injectors. http://i25.photobucket.com/albums/c83/goodnbuzzd/MISC/IMG_20150607_201024726_zpsu0enrvtg.jpg http://i25.photobucket.com/albums/c83/goodnbuzzd/MISC/IMG_20150607_201017149_zps8vof6psd.jpg Beat up one of the dart heads pretty good. http://i25.photobucket.com/albums/c83/goodnbuzzd/MISC/IMG_20150607_202051500_zpsjvwz6bfz.jpg After some clean up and tig work the machine shop shaved it IIRC about 7 thou. They said the tig work looked very pro.
The monkey running the tig is far from a pro.
http://i25.photobucket.com/albums/c83/goodnbuzzd/MISC/IMG_20150704_124941148_zpsa2wjlyad.jpg A new set of pistons was all that was needed, But it was decided to de-stroke it to a 413 with a new crank, rods and pistons. Even after de-stroking the motor it is faster at the track than the 427 ever was. But I miss the ungodly torque it had, And it is still no slouch on torque. http://i25.photobucket.com/albums/c83/goodnbuzzd/MISC/IMG_20150704_173551476_zpsg5qoa0qr.jpg Listen to the death rattle.
 https://www.youtube.com/watch?v=dQaVJSVSufk
Sum Ti Wong... |
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Posted: 8/31/2015 7:00:01 PM EDT
[#27]
Quote HistoryAnd not a word was spoken?  I would have had an EPIC case of situational Tourettes. As in, "wove a tapestry of obscenities that as far as we know is still hanging in space over Lake Michigan. "
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Posted: 8/31/2015 7:05:32 PM EDT
[#28]
Quote HistoryQuoted:
And not a word was spoken? I would have had an EPIC case of situational Tourettes. As in, "wove a tapestry of obscenities that as far as we know is still hanging in space over Lake Michigan. "
Quote HistoryQuoted:
And not a word was spoken? I would have had an EPIC case of situational Tourettes. As in, "wove a tapestry of obscenities that as far as we know is still hanging in space over Lake Michigan. "
Lol. Meh, Stuff happens. |
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Posted: 8/31/2015 7:10:19 PM EDT
[#29]
Quote HistoryQuoted:
SBC turning around 7400 when we discovered the machine shop didn't weld a weight they used to balance the crank. Basically had metal rod sticking out the side of the crank at 7400 eating everything in it's path. One of my old bosses wanted me to install a slug radially once. I politely declined. So he installed it, as far as I know, engine is still going strong. But radial installation of Mallory or other metals on cranks is up front on my list of "shit not to do when building an engine". |
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Posted: 8/31/2015 8:15:30 PM EDT
[#30]
Quote HistoryQuoted:
get back to me when you do this, none of the internal parts failed, the block just split in half http://i527.photobucket.com/albums/cc358/6768grunt/558517_663629087000392_1496020043_n_zpsb6ed99cf.jpg I did that to a small block once, but the only pieces salvaged off the entire long block was one valve cover and the intake.. it let loose at just over 8000 rpm.... guy behind me said it looked just like a nascar motor letting loose at the track..big ball of fire, big oil/coolant slick on the road.... .. luckily I didn't crash putting the tires thru the slick.... .. I was kind of crazy when I was younger about HP........well, i still am I guess...
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Posted: 8/31/2015 8:23:24 PM EDT
[#31]
Quote HistoryQuoted: get back to me when you do this, none of the internal parts failed, the block just split in half http://i527.photobucket.com/albums/cc358/6768grunt/558517_663629087000392_1496020043_n_zpsb6ed99cf.jpg |
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Posted: 8/31/2015 8:44:53 PM EDT
[#32]
Quote HistoryThat puppy had some miles on it. Nothing lasts forever. |
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Posted: 8/31/2015 8:47:56 PM EDT
[#33]
Damn, that sucks.
OP, tell me about the build if you would. I will be building a 340 this next year. I am on the fence about stroking it. The only real locked down parts will be a set of seriously ported Edelbrock or Indy CNC heads and a six pack. |
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Posted: 8/31/2015 8:48:27 PM EDT
[#34]
Isn't the piston suppose to be the cylinders
Quote HistoryQuoted:
get back to me when you do this, none of the internal parts failed, the block just split in half http://i527.photobucket.com/albums/cc358/6768grunt/558517_663629087000392_1496020043_n_zpsb6ed99cf.jpg |
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Posted: 8/31/2015 8:50:46 PM EDT
[#35]
This is pretty cool
I didn't realize we had so many drag racers here
I don't feel like such an oddball now
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Posted: 8/31/2015 9:01:30 PM EDT
[#36]
Quote HistoryQuoted: get back to me when you do this, none of the internal parts failed, the block just split in half http://i527.photobucket.com/albums/cc358/6768grunt/558517_663629087000392_1496020043_n_zpsb6ed99cf.jpg I was couple miles short of blowing the crank out the bottom and driving over it. Since then I've heard that early dmax blocks were poured in Germany and we're known to have issues....not sure if I believe that. I beat that motor. Built a new one and beat that one daily. Pay to play or whatever. |
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Posted: 8/31/2015 9:01:40 PM EDT
[#37]
Caught this one in time, thank goodness.
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Posted: 8/31/2015 9:05:52 PM EDT
[#38]
Quote HistoryQuoted:
Caught this one in time, thank goodness. http://imageshack.com/a/img703/1329/dsc03648i.jpg http://imageshack.com/a/img21/6075/dsc03649q.jpg Nice. we've had one or two of those.
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Posted: 8/31/2015 9:08:07 PM EDT
[#39]
Quote HistoryQuoted:
This is pretty cool I didn't realize we had so many drag racers here
I don't feel like such an oddball now Dragracing? , that was my daily driver motor......
I kid, I kid..but I always said I was gonna stab it in my pickup for a few weeks each year... |
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Posted: 9/1/2015 7:54:45 AM EDT
[#40]
Quote HistoryQuoted:
Damn, that sucks. OP, tell me about the build if you would. I will be building a 340 this next year. I am on the fence about stroking it. The only real locked down parts will be a set of seriously ported Edelbrock or Indy CNC heads and a six pack. The 340 is a high revving motor, and I enjoyed the one I had before this enginer. That being said, if I were building another one for power I would certainly go the stroker route, insane power on pump gas. 340 stroked to 416ci .030 overbore 4.00" Mopar Performance crank Ross Racing pistons SCAT rods Edelbrock aluminum heads, milled to 60cc, ported and polished Compression ratio 10.55:1 (gasket thickness .039, deck height .0001, piston valve pocket -21cc, honed with Mopar torque plate, magnafluxed, sonic checked, etc. etc.) Internally balanced with 4 pieces of mallory metal. Custom-ground Comp Cams camshaft, .519/.529 solid Mopar Performance 1.6:1 adjustable roller rockers Edelbrock Performer RPM intake Holley 3310 (750 W/ vac secondaries) |
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Posted: 9/1/2015 8:02:58 AM EDT
[#41]
Quote HistoryQuoted:
Looks like it was beating itself around inside the cylinder before it impaled itself in to the piston. Bet that made a bang. How had are the cyl head chambers? Heads saveable? EDIT: nvm. I see its really old news.
Quote HistoryQuoted:
Looks like it was beating itself around inside the cylinder before it impaled itself in to the piston. Bet that made a bang. How had are the cyl head chambers? Heads saveable? EDIT: nvm. I see its really old news.
I'm guessing the valve head was being worked back and forth until it fatigued enough to break. When it let go it made a rattle and then stalled out. I coasted into a parking lot and called for a flat bed
Quoted:
Suspend that in a clear resin block for a kick ass paper weight Sucks other wise
I kept it for that reason. The shop wanted to hold on to it to remind them to double check and I said nope, I paid for that and you guys ruined it along with setting me back another summer of driving the car. |
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