carnage pics of cranckwalk

[trevor425]

Crank-walk** anyway to edit the title?


well i was on the highway the other day, when suddenly my car started knocking a bit. pulled off checked the oil, was full. i knew it was pretty much done for at that point, so i tried to limp it home, made it about 3 miles and boom! threw rod #2 through the block and broke the piston in half. bent 2 exhaust valves as well.
a friend of mine happens to be sitting on a fresh built 6 bolt short block and flywheel, i picked up it for 400$
its bored, the pistons have 63d T 2 and 0.75 cast into the tops. not sure on the actual bore yet. so i need a gasket kit, couple of valves and a new oil pan still. really shit timing $$ wise, but what can you do?


*first pic is new engine*

 

[JusMX141]

Here's some fun pics from a crankwalked 7-bolt my buddy Jeff bought for his stroker build:


Center crank journal- the good side (normal wear):

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Center crank journal- the bad side (crankwalked):

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Crank thrust bearing- the good side:

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Crank thrust bearing- the bad side:

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Here you can see just how worn the bearing is; check out how much thinner the bottom lip is than the top:

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and finally, the video of the movement. This is essentially how far the crank moved in and out of the block:

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[Kickerbeast]

Is this a common result of crankwalk? I'm looking at the pics and I'm guessing that the rod bearing just gave you the finger and ran away. The end of the rod is discolored, so it got REALLY hot. The wear on the thrust bearing is less than I had on mine when I pulled my engine down. I just don't see an engine going that quickly from crankwalk. The wrist pins slide in the piston, so even the crank moved, there wouldn't be much of any excessive load on the crank side of the rod. Not that it matters too much since the block is junk.

 

[98dsmkid]

damn WTF thats sucks bro.... well at least you got another block for cheap....looks like another build for you.....

 

[2GbTalonGuy]

Is this a common result of crankwalk? I'm looking at the pics and I'm guessing that the rod bearing just gave you the finger and ran away. The end of the rod is discolored, so it got REALLY hot. The wear on the thrust bearing is less than I had on mine when I pulled my engine down. I just don't see an engine going that quickly from crankwalk. The wrist pins slide in the piston, so even the crank moved, there wouldn't be much of any excessive load on the crank side of the rod. Not that it matters too much since the block is junk.

If left for too long it is.

 

[yoshi_tony]

damm sucks bro i know how you feel... i got about 7 different engine, i can probably get an complete album on pictures

the worse one i had was on a 420a i was going 70 around 10 pm i hear a boom then it shut down so i tried to turn it on by letting go of the clutch and the car cought on fire from the engine to the back bumper the whole street lighted up hahaha

 

[Tanro]

That doesnt really look like crank walk. It looks more like you spun a single rod bearing and that lead to catastrophic failure. I have seen engines with spun bearings run forever. And other blow the #### up in less than 5 miles.

I woulda called a tow rather than have to deal with all that. Good luck with the rebuild though.

 

[trevor425]

@ justmx, that's some major thrust wear! at least he could salvage it.
@ tanro, i would of noticed a spun rod bearing, they dont exactly spin without it knocking constantly. this was an obvious oil restriction that rapidly degraded. yea i should have towed mine home, but then i would have just rebuilt a 7 bolt. oh well im lazy like that..


everyone else, let me clarify that im not 100% sure crank walk was the main cause of failure.

im guessing by the amount of metal in the pan, and that the #2 rod being starved of oil. that it was caused by thrust bearing wear material cloging the oil feeds, either way the thrust bearings are excessively worn and this is definitely an engine that had crank-walk and that WILL in FACT abuse the rod bearings due to lateral movement.

weather or not it was the cause, my shit is ###ed and you all get to see pics of my misfortune. that's what makes the net so fun right? anyways ill update if anyone's interested in my new build.

for the record i was running 12psi of boost, mild tune on 91 octane. factory engine with 120,000 miles at time of failure. purchased car around 110,000 and it has been abused by many others then me judging by mods equipped at time of purchase.