RE: Whats The Worst That Could Happen? I Just Blew My ****in Motor Part II
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 8:52:19 AM
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66 stang
Posts: 188
Joined: 4/22/2006
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that sucks man, have fun rebuilding that...
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 9:19:56 AM
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Scotty07
Posts: 524
Joined: 2/14/2007
From: Psychiatric Unit
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Quit your whining!! Anyone with a degree from Redneck Tech. can fix that!! 
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Wipe twice and flush once, or is it measure twice and cut once...??
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 9:27:46 AM
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EmperorOfChicken
Posts: 2090
Joined: 5/16/2006
From: Texas
Status: offline
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you should be proud, you thoroughly ****ed that mother up! hope you get your new motor ASAP!!
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 10:07:26 AM
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JD1969
Team MF Member #069
Posts: 8459
Joined: 5/21/2004
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I've seen cranks come apart before, but very rarly in that many pieces, somthing locked up in there pretty bad. I would not reuse the ARP bolts, there had to be a ton force put on them and for the price (and what they hold together) new ones are cheap insurance.
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GET IN THE RING!
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 10:32:18 AM
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my77stang
Posts: 6974
Joined: 12/19/2006
From: Citrus County, FL
Status: offline
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arghhh where do i begin?
someone asked if the block was cracked? yes, yes it is and multiple places.
yeah i wont be using the main bolts again, i was still in shock last night and was grasping for what i DIDNT have to replace.
while i find it hard to believe, the last thing i did was mess with the timing and hook the vacuum advance up - could too much timing slightly off idle cause this to happen? i had 15 deg. @ idle with 20 deg. worth of mechanic giving a total of 35 deg. which according to everything i have read and two different accel techs said was fine. they both also agreed 15 deg. at idle was better than 5 deg. which is what i would have needed if i had the mechanical advance flipped around giving 30 deg of advance (30 + 5 base= 35). from what i understand the vacuum is only supposed to advance at part throttle (timed vacuum port) and should dissappear as the rpm's climb up there.
could it be possible that i had full mechanical advance and still had vacuum advance too giving me too much? i had adjustable vacuum setup so that it should have had no more than 6-8 degrees from the can. (4 turns out from bottom was 14 deg and i went half that, shoulda been about 7 deg.)
i cant see (worse case) 42 deg's of timing do that.
is there any place that i can submit these pics? hall of fame /shame? maybe i can score some rebuild parts for my fantastical fragging *crosses fingers*
.........discuss
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 11:01:59 AM
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Mustang Dad
Posts: 337
Joined: 10/16/2006
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OK, so the block is shot. I wouldnt use anything from the lower end.....anything below the heads. Maybe the cam and lifters, but get it Magna-fluxed. With a sudden-stoppage like that, anything can get twisted out of shape and still look like its in great condition. If the pistons didnt come up and smack the heads then the heads might be ok with a really deep inspection. The intake is good to go, as is the carb. Check the dizzy over close, make sure the gear is ok and the shaft isnt twisted (this can throw the timing off later if it is). If your going to be looking at making some real serious HP on the rebuild, get a forged steel crank. Make sure it has been nitrided and stress relieved. Other than that, good luck and sorry ti see it have happened.
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If it wasnt made for this car, a hammer and screwdriver will usually adapt it to fit.
2004 Chevy Avalanche------Mine
1995 Chevy Camaro---------The Wifes
1965 "C" Code Mustang coupe---------The sons
1947 Beech Bonanza--------Family vehicle
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 11:25:09 AM
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my77stang
Posts: 6974
Joined: 12/19/2006
From: Citrus County, FL
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im looking at a coule routes right now..... slap these heads and cam in a later 302 block i have, using some flat tops or something instead of the crazy .440 dome's..... just drive nice on her and save for a bigger better build.
score 289 parts, and build it that way.
go balls out with a 408 stroker (which i dont have money for and is an ever harder, tighter fit in my car.
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 12:54:24 PM
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Bentworker
Posts: 164
Joined: 7/26/2006
Status: offline
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That is incredible, I never thought a crank could just disintegrate like that.
That thing belongs in a machine shop as a centerpiece! Seriously you may be able to slap it back together into its post explosion state and sell it to someone.
I would think about going with a crate stroker shorblock, maybe less HP but more torque.
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1971 Mustang Grande project.
425hp 426 Ft-lb 377" Cleveland with CHI 2V heads & many other goodies. Broader built FMX transmission 10” custom converter. Maier racing suspension, 31 spine 9” with Detroit True-trac, more to come.
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 1:05:22 PM
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Norm Peterson
Posts: 1404
Joined: 2/26/2007
From: Delaware Twp, NJ
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I'm not sure I'd trust the cam or anything else in the valvetrain. At least one lobe and lifter have seen excessive loads, and the lubrication to all is a bit suspect, so I wouldn't bet too heavily on not wiping a lobe or two later. You might have even bent a rocker stud or three.
What I think happened is that the main web let go first and everything else followed. Castings don't particularly like bending loads, and that crank got lots larger bending loads when it lost at least one of its supports. And kept breaking as its support configuration changed and different cylinders fired. When the end bays lost the support at #2 and #4 either due to the web, bearing, or cap failure, or just from the crank losing continuity across those webs, the external parts could flop around, resulting in the snout and starter damage. The bent pushrod is incidental. That gear drive is probably still good as a paperweight, but I wouldn't trust it for any sort of accuracy.
On edit, were any of the main cap bolts bottommed out in their holes? I'm aware of bad possibilities with having studs themselves bottommed and torqued to the full values, so it wouldn't surprise me if something similar could occur with bottommed and fully torqued bolts.
Edit #2, I just might tackweld that crank together with alignment that might show how it was just as it broke, and hang it up as a conversation piece.
Norm
< Message edited by Norm Peterson -- 4/8/2007 1:13:40 PM >
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 1:57:13 PM
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my77stang
Posts: 6974
Joined: 12/19/2006
From: Citrus County, FL
Status: offline
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well i got the rest of it apart and the main web for #3 is cracked all the way up to the cam journal. just to clear up the oiling questions, none of the bearings looked like they were starved, and the chunks of crank still left in the mains actually rotated without an trouble. the cam spins freely and i looked it over for any impact marks but i cant find any. i dunno what im going to do with it honestly. two rod bolts snapped off, and others had bent. i dont know about main bolts bottoming out but i wouldnt imagine they coulda ?!?!
also i checked the heads with some gas in the ports, one cylinder has the intake and exhaust bent ever so slightly. couldnt even make out an impact mark and you wouldnt know it was bent unless you checked for sealing or looked REAL closely.
heres the final pics, the rest of the crank chunks out of the motor, the twisted rods, only had one piston that didnt suffer some sort of damage, and 3 cylinders have chunks missing and a couple others have cracks.
its may be hard to see the crack, but it starts where the main cap seating area is machined and goes up to the cam and back down the other side.
every one of these rods is bent, they arent just sitting crooked...... +1 for not having a single rod snap though, even the rod caps were bent and twisted to hell but didnt actually snap.
norm, what do you do for a living? you seem like you must work in this field. so do you think if the #3 web gave out it would have caused all this in the aftermath?
seriously, if anyone know a place who would want this stuff for display, i'd gladly trade it for a rotating assembly. i can get a block and machine work for free or next to nothing and i got good heads.
< Message edited by my77stang -- 4/8/2007 2:04:05 PM >
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 3:57:00 PM
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toolwench
Posts: 239
Joined: 2/16/2007
From: near Los Angeles
Status: offline
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Wow.
If you're gonna blow a motor, you're gonna do it right! Jeepers creepers! That's impressive in a sick and twisted kind of way.
Every time my motors have made expensive noises, they were never quite that bad...or that sudden. Wow.
quote:
ORIGINAL: my77stang
im looking at a coule routes right now..... slap these heads and cam in a later 302 block i have, using some flat tops or something instead of the crazy .440 dome's..... just drive nice on her and save for a bigger better build.
score 289 parts, and build it that way.
go balls out with a 408 stroker (which i dont have money for and is an ever harder, tighter fit in my car.
+1 on that... If you just wanna get back on the road, definitely run what you've got and save the crazy stuff for later.
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My complete stable:
'66 Corvette vert (427/425), '68 Mustang fastback (347), '68 Mustang vert (302), '69 Corvette (427/390), '00 Prowler, '03 Viper, '08 Saturn Sky Red Line
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 4:05:01 PM
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my77stang
Posts: 6974
Joined: 12/19/2006
From: Citrus County, FL
Status: offline
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yeah i talked to a buddy today who has some random 289's 302's and 351's laying around his garage. he isnt doing anything with em and he told me to come over tomorrow afternoon to see what hes got and what i may be able to grab.
hoping for 289 stuff, but in any case i'll be happy with whatever i can get . machine work should be free or next to it (its nice having these kinds of friends  )
so i'll be looking at pistons, rings/bearings, gaskets, and a decent timing chain.
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RE: Whats The Worst That Could Happen? I Just Blew My *... - 4/8/2007 4:22:20 PM
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toolwench
Posts: 239
Joined: 2/16/2007
From: near Los Angeles
Status: offline
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You're lucky you've got Ford friends... All mine are Chevy. Mostly what I get from them is a load of sh*t when something goes wrong with my Mustangs...plus the obligatory 'girls don't know sh*t about cars', but I'm used to that and stopped caring a long time ago.
I hope you manage to grab enough stuff to get another engine together. Reminds me of looting my spare parts and coming up with a full motor minus a block which I got from a junkyard. That thing ran like crazy, but leaked so much oil I had trouble keeping up. Every time I fixed one leak, another would open up. I finally gave up when the front main started leaking. I sacrificed that motor for parts to build a stronger one which is in my convertible now. Slow, but way reliable...
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My complete stable:
'66 Corvette vert (427/425), '68 Mustang fastback (347), '68 Mustang vert (302), '69 Corvette (427/390), '00 Prowler, '03 Viper, '08 Saturn Sky Red Line
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Printable Version
well look at it this way now you can build the motor how you want it.
