Horrible Mechanical Failures: Looks Like the Tin Man's Undies After Taco Tuesday

The Something Awful Forums > Discussion > Automotive Insanity > Horrible Mechanical Failures: Looks Like the Tin Man's Undies After Taco Tuesday

Kiyanis: Sep 25, 2007; BBQ Now.

grover posted:

Well that's stupid, how is that suppose to test for failure of the seatbacks to prevent luggage penetration into the passenger compartment? The rear seats in my 98 Ford Escort failed when my wife had an accident, even with virtually nothing in the trunk and a mere 20mph front-end impact.

The steel should simply be sitting in the trunk, not welded in. Or other ballast added up to the car's stated load capacity, like suitcases full of sand or something.

They are testing the wall, not the car.

# ¿ Nov 15, 2009 01:55

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# ¿ Apr 26, 2024 12:35

Kiyanis: Sep 25, 2007; BBQ Now.

Frank Dillinger posted:

no, its sucking in oil which happens when the crankcase is overfilled. the oil ignites on the compression stroke, like diesel, and so the engine keeps running. there really is no way to kill it other than running into a wall or dropping it into 5th if you have a manual. The awesome part is, the engine will keep going faster and faster until it kills itself.

I suppose if you are feeling brave and you are really quick, you could somehow block the air intake with a balled up shirt or something.

# ¿ Nov 18, 2009 00:26

Kiyanis: Sep 25, 2007; BBQ Now.

UserNotFound posted:

Seems like you'd be able to stop it with something as simple as a small cannister of c02

A fire extinguisher aimed straight at the intake, maybe?

# ¿ Nov 18, 2009 01:28

Kiyanis: Sep 25, 2007; BBQ Now.

UserNotFound posted:

I bet you could install one of those tiny 9oz paintball cans to the intake triggered by a simple sensor/logic device.
Is the ingnition switched off?
Is the crank sensor indicating >3,000 rpm?
YES. YES. FIRE THE THE C02!!

I wouldn't trust one of those to not blow the burst-disk in that heated environment. I've had all of them, from 3.5 to 24oz canister blow burst disks simply by sitting out in the sun on a summer day.

# ¿ Nov 18, 2009 01:40

Kiyanis: Sep 25, 2007; BBQ Now.

UserNotFound posted:

Well if a manufacturer were going to engineer it in as a safety feature, I'm sure they'd have a better solution than a spare paintball tank I kinda want to do an experiment now, though... but I think some more research is in order!

Yea, but Brain... Where are we going to find a spare 6BT?

# ¿ Nov 18, 2009 01:58

Kiyanis: Sep 25, 2007; BBQ Now.

Leperflesh posted:

Forgive my noob question but, even overfilled, how does the oil get into the cylinder? I thought the cylinder had to be sealed, because it creates a vacuum on the downstroke to suck in oxygen and fuel for the compression stroke. I get that overfilling the oil could cause the engine to agitate and foam the oil, which is bad, I just don't see how it winds up pouring into the intake.

I don't know anything about diesels. On my ranger though, the 3.0L V6, there is a tube that goes from the crankcase to the air intake. It's so the engine can vent expansion gasses back into itself, and not the general atmosphere. It also ensure that any gasses sucked in are filtered as the tube is after the air filter.

It's called a crankcase breather tube, or somesuch. If the diesel has a similar setup, then seriously overfilling the engine can VERY easily allow oil to be intermixed with the air going in.

This picture is from a Taurus, but it's still a 3.0 V6. (Not diesel.)

http://www.taurusclub.com/encyclopedia/Engine/Large/04_Vulcan.jpg

Right above the oil-filler cap, you can see the breather tube. It goes from the crankcase, and up to the intake line.

# ¿ Nov 18, 2009 02:29

Kiyanis: Sep 25, 2007; BBQ Now.

tzam posted:

Assuming that it is not running on its own oil from a leaky turbo or another source, yes.

I think choking the engine would be the best way to combat runaway. No matter how you get your fuel, be it crankcase breather or hosed turbo, it doesn't combust without air.

The Co2 purge seems like a cool idea. You would need enough to continuously blast the intake until the crank stops spinning on its own. Otherwise it would just start right back up again once the canister runs out.

# ¿ Nov 18, 2009 03:04

Kiyanis: Sep 25, 2007; BBQ Now.

sndgeek posted:

http://www.youtube.com/watch?v=-_EXtBEaBbs

I apologize for the horrible horrible History channel treatment. But...one wing? come on.

I remember watching this some weeks ago. My reaction now is the same as it was then.

:rock:

# ¿ Nov 18, 2009 05:05

Kiyanis: Sep 25, 2007; BBQ Now.

Godholio posted:

If the explosion was in another cylinder, that piston might be forced down but another could be forced up.

Don't give me crap for talking about an explosion inside a combustion cylinder, I know.

Another far-fetched alternative is that the piston's connecting rod failed in such a fashion as to allow the piston to be forcefully ejected into and through the head by the force imparted on it from the rotating mass of the crankshaft/other pistons. Maybe.

# ¿ Nov 24, 2009 00:53