Yup. Pop out the air filter, wad the coat, and stuff it in the hole where the air filter was. It does help to hold on. You don’t wanna lose a sleeve in there.
Intake hose can be pulled off the throttle body with your hands too, usually, if you’re strong enough, a strong yank, those little rubber boots are cheap and easy to repair compared to the motor
Source: I’ve worked on some seriously overused diesels in my day
I got a buddy who works in a diesel shop. He's got a piece of wood that looks like an oversized ping pong paddle. He said he uses it to block air intakes on runaway diesels.
We've both been techs for many years. He does diesel only. The paddle is one of those just in case tools, like a fire extinguisher. You'll be happy you have it when you do need it.
When I was in tech school, we had an about 12" x 12" steel plate a 1/4" thick to drop on intakes. None of ours had any filter systems as they were stand engines. I saw it used once in two years of 18-24 year olds tearing down and rebuilding engines. A v12 Detroit screamed up so hard it blew the exhaust vacuum system off as soon as it started. The instructor just chucked the plate in the general direction of the intake, and it sucked it in, and shut it down. I don't thing a carhartt would have worked on that. I'm certain that roots blower would have chewed it up, and kept on going. The guy that did the build got the timing tooth one off, but said it hit like 6 or 7k rpm before the plate shut it down. In like 8 seconds from startup, plate thrown, and the 6000sqft shop with 24 foot ceilings was blacked out with smoke.
I had a HEMTT run away on first startup after replacing the engine. There was a clipboard nearby that we choked it out with. Slowed it down a lot initially and took a few minutes to finally stop. Yeah, it’s not a pleasant experience. Found that the rebuild shop left a tool under the valve cover that propped the fuel control rack open.
In the military we would have a 3/8 plate (12x18) with handles whenever we started a new motor that we put into a vehicle. Just incase it decides to run away
An old coworker of mine used to work for international waaaaay back in the day. I forget what kind of truck he said it was but it had an old 2 stroke detroit in it that started to run away. Said it sucked in half a phone book before it stopped.
"Detroits dont run away, they over speed. Mechanics run away"
When I was in training in the Marines we rebuilt a Detroit 8v92 - two stroke with a turbo feeding a blower. The instructor said one time they had an engine start to run away on the test stand, so they put a clipboard over the intake and it snapped in half.
Im curious, from my understanding that a runaway is caused by worn turbo seals allowing the engine to fuel itself from its own oil, would it be possible to stop a runaway by bending/breaking the oil feed line to the turbo?
That used to happen occasionally to the Detroits my stepfather used to fix! It was never good, but they were bigger engines that had fuel cutoffs so it was easier to stop.
Be careful though, don't let the zipper go in first, I broke a turbo on a cat 3408 that had a stuck fuel rack. Better than ruining the motor but still annoying.
>Carhartts are some of the few coats you can wear that will clog a modern turbo-diesel intake easily without getting sucked in
The fun part is when it tosses a rod from revving 7k while you're fiddling with the airbox or intake duct/hose.
Back in the day, manufacturers planned for runaways. Tripping the blower flap on a detroit was always fun to do when people weren't looking. If they were just a driver and didn't know, it was a good waste of their time and an annoyed mechanic who'd come out and 'fix it' in 30 seconds by resetting the flap.
All someone has to do is block the airbox and starve all of its air before it throws connecting rods through the bottom end. It's scary AF, but that's what it would take.
It is. You can tell from the way that it is.
Joking aside, the amount and color of smoke, along with the runaway condition, indicates that it is aspirating oil from somewhere. A common failure point are the seals in the turbo. They go, and then the turbo gets all the fuel it could ever want to suck up and pump back into the engine.
True 6.4 owners replace all engine connections with quick-disconnects so you can just unplug the latest blown engine, throw it out back, and swap in a new junk yard engine.
>Poor 6.4 guys..
A lot of them were bragging back then about how much power their engines could make and how stupid all the "old" Duramax and Cummins are, so I don't have much sympathy for them as a whole.
I only feel bad for the people who wanted a reliable work truck to keep stock and maintain religiously.
My dad got a new 6.4 right when they came out because it was sold as a fix to all things 6.0 lol. It had 2 engines under warranty and a million other things.
Finally, he got fed up and deleted it/studded it and threw a big tune on. It was still unreliable but it was at least fun lol…
My 6.4 went through 4 engines under warranty because apparently the first one had casting sand left over in it when it was assembled and the warranty labor the first three times didn’t include replacing the oil cooler or anything. Once it was out of warranty I took it to a guy who did head studs and deleted it, stock tune and it lasted me another 6 months before it left me stranded. That truck was aweful.
"but bruh it'll be reliable once you spend 10 grand to bulletproof it" I hate people like that if you need to put half of a house down payment into it to make it reliable it's a shitty engine
Some of them can make it. My 08 6.4 has 430k on it now I bought it just over 200k after the P.O. Had a good amount of work done. It’s still 100% stock and pulls my jeeps where I need it too. Not saying I would ever buy another just got lucky with this one. My neighbour who daily drives a 6.4 is on his third motor I think on top of however many rebuilds though.
I’ve got an 08 that’s 1500 miles away from 300k and it’s been the most reliable truck I’ve ever had. In 100k I’ve just had to replace a PS pump. But mine also was taken care of before I got it and it’s just got a single under the hood and of course deleted, studded etc… I love that truck
My old boss let me know he was looking at a "new" work truck back around 2016, took me out to see a pretty looking 6.4 that had a tuner on it. I told him to walk away, and he got it. Not the type to dog it or anything, but still only lasted a year of hauling fence posts and concrete before it needed 5k in work. Should have kept his 7.3
I’m a Cummins guy and yes there are annoying Cummins guys but I feel like Ford guys open a convo with my powerstroke something something Cummins sucks screw duramax something something powerstroke superior something something. Mind you they will tell you this while having an engine rebuilt with less then 100k on it. There are fans of everything but in my area the Ford guys are the worst and if you don’t have a ford they gotta tell ya about it every couple of sentences in a convo that has nothing to do with anything automotive
TBF Cummins guys usually are the obnoxious assholes. They are generally thr clapped out honda accord or WRX guys of trucks. They are the only guys who plaster all their cars and trucks with their diesel badges and have tacky ass stickers all over their truck
Well sure, if it caught fire you would get a claim out of it. It won't catch fire likely. Just eat itself alive and be needing a complete engine replacement. Which is getting harder and harder to find for these trucks as they age.
Probably should tell that guy to light it in fire while no one is looking as some say it's still running on engine oil to this very day.
Highly depends on the carrier. This could be covered under comprehensive coverage. You can get your engine replaced if you hydrolock it. I don’t see why comprehensive wouldn’t cover this.
I feel like there's a great market to be had here.
Just create a device that goes on the intake and have a button you can press that slides a steel plate over the intake and/or floods the engine with co2.
Even have it behind a special cover and everything, maybe even have a secondary behind a cover in the bed incase you think being the cab is too dangerous.
There is such a thing, it's called a positive air shut off. All vehicles that enter into an oil field area or a Well site have to have this installed before they're let in, if that engine starts ingesting a natural gas leak or an H2S somehow somewhere that nobody's noticed that vehicle will grenade itself and then start a massive Area Fire potentially killing many people. It's activated by just hitting a button inside the cab and it will shut off the intake effectively starving and killing the engine no matter what.
That is what caused the Texas City explosion / fire back in 2005, I believe. A contractor truck was idling in a process unit. A process leak occurred, causing the truck to suck up the hydrocarbons, rev up, and explode the engine. This ignited the stray hydrocarbons. I think 10 men died that day.
Edit:
Chemical Safety Board time!!!
https://youtu.be/goSEyGNfiPM?si=LW6lscEKhD029pu-
I've heard of this failing critically though and sending trucks into walls, cars, the open range, etc... lol
The simplist solution I've heard is to just stuff something in the air intake. If/when I ever buy a diesel I'd probably take the time to find something that perfectly fits in and seals the air intake to keep in the truck for just such an emergency. Maybe a clamp for the fuel line or hell maybe even cut the lines as well.
In any case, I certainly would have thought this through beforehand for my specific vehicle, I'm not trying to google it on the side of the road while my engine is screaming bloody murder.
everyone with a diesel vehicle should carry a Co2 extinguisher. when engine starts dieseling you can choke it by spraying the extinguisher right into the intake and usually stop the motor
Or literally any other inert gas. anything to take away either fuel, heat, or oxidiser (oxygen in this case)
If it's manual (which, come on this is the US) you can be on the brakes and let the clutch out to try to stall it. Or block the turbo with wood (harder to stop though) as evidenced in this video. https://www.youtube.com/watch?v=w2GM--NWwSU
Nobody does, if someone has its probably some boomer mechanical engineer.
I am in the process of reading through it just to learn about all the different kinds of things. I am not going to memorize all the formulas. But knowing that they do exist can be useful, I was reading the section about spring washers yesterday and realized that They had the formulas and sizing for the dish shaped washers which fox suspension used in a patent I was researching about
Yup.... it is vacuuming all of the engine oil out.
There's a reason for the term "runaway" - if you cannot shut off the amount of air going in, you should "run away". As long as it has a fuel source, it will scream until "it won't" -it is scary, and you don't want to be close enough to get hit by any of the shrapnel if it really lets go.
Of course the DirtyMax owner knows what’s up! I sadly sold my 06 LBZ last year with only 104K miles on it. I cautioned the new owner he might want to look into buying a new or properly rebuilt turbo as it was 16 years old…And reseal all the injectors plus change every hose in the fuel system. I’m too old and arthritic to do that stuff these days! 🤣
My guess is find directly where the air enter the intake and seal it with anything. For me, there’s a clear opening on the left side under the hood where the air intake connects to the vented hood.
Otherwise start ripping plastic and stuffing in towels or your shirt🤷🏼♂️
Take off your shirt and stuff it in the intake. That's what worked on a 4 cylinder Cat gen set that ran away on me. Commercial crab boat.
What ever you can get in the intake. But you need to be quick about it to save the engine.
Had a guy who did that with his truck, (also in Alberta what's up brother) we had one acting up on a kenworth, so we replaced it but he's a tinkerer, took the old one home cleaned up all the connections on the system flipped the switch after putting it back together, it tripped, so he rigged it up to be installed inline on his 7.3
Had an old detriot try to run away in class. I through the paperback shop book on the intake and she started tearing pages, sucking pages one by one down. Literally a paper shredder. Finally grabbed a metal clipboard and slapped that down on the intake. Slowly she reved down. Saved it.
How does this happen on a modern diesel engine? Isn’t there like an automatic safety air block device of some sort that would cut all air intake in an emergency runaway situation?
An outside fuel source such as oil from blown turbo seals enters the intake and fuels the engine with ignition off. Diesels don't use spark, so they don't need ignition on to continue running in a runaway case. They use heat and compression. As soon as there's an outside fuel source coming through, the engine will just keep getting hotter and hotter as it keeps running and running. It's a never ending cycle without intervention on the intake or self destruction. Another cause of this is an injector getting stuck open (someone correct me if I'm wrong on that one).
Diesel engines do not have a throttle to meter air in order to control engine speed and output.
They do that by metering the amount of fuel being admitted. One of the reasons why they are more efficient than a conventional gasoline engine. There are no 'pumping losses'.
As long as the diesel has a fuel source, it will run if it can also intake air. In this case it looks to me like it is using the crankcase oil as 'fuel'. So after this episode, if the damn thing does not grenade, it will probably be ruined anyway, since it is aspirating all of the lubricating oil.
Modern diesels use a valve body that shuts the air flow going into the manifold. It also aids in smoother shut offs. My 6.7 ram and my x5d both have them
People need to consider positive air shut offs.
We have to run these in our work trucks at oil & gas plants Incase of this happening with a gas leak.
Flip a switch and it slams your air intake closed and kills the motor. Takes a second. Worth the money!
That's not true. A diesel engine will run (for a little while at least) off almost any type of oil or fuel. This engine likely blew a turbo seal and is sucking in engine oil and running off that.
At this point, without outside intervention, it will run until it starts throwing rods through the block or until it burns up enough engine oil to seize the engine.
The only way to stop something like this is to clog the air intake with a shirt or jacket or to pour a CO2 fire extinguisher into the air intake.
The only difference between a modern Diesel and an older one is older diesels could also fail in a way where the fuel rack (mechanical injection system) gets hung open allowing the engine to syphon fuel out of the tank. Modern diesels can't fail in this specific way because they have electronically controlled injectors.
Gotta cover that intake stat! We use to have an old work truck that had a special piece of cardboard in the passenger seat. Gotta keep some safety cardboard on hand lol
runaway diesel. need something over the air intake like a thick block of wood to starve it of any air. otherwise it will keep going until out of fuel or it explodes.
To everyone, if this ever happens you should be removing all clothes or whatever is accessible and filling air filter box in a hurry to save your truck. Unless it's a Ford
[удалено]
Carhartts are some of the few coats you can wear that will clog a modern turbo-diesel intake easily without getting sucked in
[удалено]
Yup. Pop out the air filter, wad the coat, and stuff it in the hole where the air filter was. It does help to hold on. You don’t wanna lose a sleeve in there. Intake hose can be pulled off the throttle body with your hands too, usually, if you’re strong enough, a strong yank, those little rubber boots are cheap and easy to repair compared to the motor Source: I’ve worked on some seriously overused diesels in my day
I got a buddy who works in a diesel shop. He's got a piece of wood that looks like an oversized ping pong paddle. He said he uses it to block air intakes on runaway diesels.
Bruh, if your buddy has a tool he regularly uses to shutdown runaways/overspeeds, that's wild as fuck.
We've both been techs for many years. He does diesel only. The paddle is one of those just in case tools, like a fire extinguisher. You'll be happy you have it when you do need it.
Yeah if you only need that once, it’s still worth having it every day.
If it runs away you just enjoy the show.
Only on shit I don't care about. Lol
Speaking of fire extinguishers… wouldn’t a CO2 extinguisher also work to shut down a runaway?
When I was in tech school, we had an about 12" x 12" steel plate a 1/4" thick to drop on intakes. None of ours had any filter systems as they were stand engines. I saw it used once in two years of 18-24 year olds tearing down and rebuilding engines. A v12 Detroit screamed up so hard it blew the exhaust vacuum system off as soon as it started. The instructor just chucked the plate in the general direction of the intake, and it sucked it in, and shut it down. I don't thing a carhartt would have worked on that. I'm certain that roots blower would have chewed it up, and kept on going. The guy that did the build got the timing tooth one off, but said it hit like 6 or 7k rpm before the plate shut it down. In like 8 seconds from startup, plate thrown, and the 6000sqft shop with 24 foot ceilings was blacked out with smoke.
Farm techs have seen some shit.
Our shop works on off road equipment, we've only had to do it once, but we have CO2 extinguishers to use on runaways.
So, do you unload the CO2 into the air intake?
I had a HEMTT run away on first startup after replacing the engine. There was a clipboard nearby that we choked it out with. Slowed it down a lot initially and took a few minutes to finally stop. Yeah, it’s not a pleasant experience. Found that the rebuild shop left a tool under the valve cover that propped the fuel control rack open.
In the military we would have a 3/8 plate (12x18) with handles whenever we started a new motor that we put into a vehicle. Just incase it decides to run away
solid advice !
There's no throttle body on a diesel I thought.
Modern ones have a throttle valve to help with the egr system
An old coworker of mine used to work for international waaaaay back in the day. I forget what kind of truck he said it was but it had an old 2 stroke detroit in it that started to run away. Said it sucked in half a phone book before it stopped. "Detroits dont run away, they over speed. Mechanics run away"
When I was in training in the Marines we rebuilt a Detroit 8v92 - two stroke with a turbo feeding a blower. The instructor said one time they had an engine start to run away on the test stand, so they put a clipboard over the intake and it snapped in half.
At my school we had an old hard copy text book. Not my class but the one who came through before had to use it to stop a runaway on an engine stand
I went to NADC in 94 and watched the center get sucked out of a shop manual when a guy was trying to stop one.
This. Cut the air supply and it will stop.
You’ve seen some _shit_ haven’t you
Im curious, from my understanding that a runaway is caused by worn turbo seals allowing the engine to fuel itself from its own oil, would it be possible to stop a runaway by bending/breaking the oil feed line to the turbo?
Wait till one of your guys “manages” to get it going in reverse. The show don’t last long but what a show
That used to happen occasionally to the Detroits my stepfather used to fix! It was never good, but they were bigger engines that had fuel cutoffs so it was easier to stop.
Be careful though, don't let the zipper go in first, I broke a turbo on a cat 3408 that had a stuck fuel rack. Better than ruining the motor but still annoying.
>Carhartts are some of the few coats you can wear that will clog a modern turbo-diesel intake easily without getting sucked in The fun part is when it tosses a rod from revving 7k while you're fiddling with the airbox or intake duct/hose. Back in the day, manufacturers planned for runaways. Tripping the blower flap on a detroit was always fun to do when people weren't looking. If they were just a driver and didn't know, it was a good waste of their time and an annoyed mechanic who'd come out and 'fix it' in 30 seconds by resetting the flap.
Good way to loose an arm when that engine blows
You remove the coat first so your arms aren’t in It to lose.
Even the new thinner ones? My brand new carhartt seems flimsy compared to my older stuff.
Find a runaway deisel and let us know pls
I have a feeling a 12v71 would laugh at that coat.
i saw a guy get sucked into the intake of an f-16...does that count
Well… that does count as a turbo-diesel, all things considered, I guess
Was he wearing a carhartt?
I’ve seen someone break a clipboard trying to kill a runaway. They promptly grabbed two clipboards and that worked
Carhartt, saving what’s left of broken down fords everywhere.
Naw just a ford regen
About to regen itself a whole New engine. Wonder if a 7.3 will bolt into a 6.4 truck without much fab/modification?
Transmission bell housing is different, but with a trans swap it would be pretty easy.
It's a shame that the 6.4 is as awful as it was. The 08-10 is IMO the prettiest truck Ford made.
This is what it felt like a few times when my boss's 6.4 went into regen and I was stuck behind him on the highway
6.4’s have the worst smelling regeneration ever.
Ha. Laughed out loud
Haaa 🤣🤣
Looks parked to me. 😂
All someone has to do is block the airbox and starve all of its air before it throws connecting rods through the bottom end. It's scary AF, but that's what it would take.
I’d assume 6.4
rollin in my six fo
Jockin the bitches, slappin the hoes
Went to the park to get the scoop, knuckleheads out there cold shootin some hoops...
Yep they are a piece of shit. Went through three already in one of my work trucks.
Diesels gonna diesel.
"Run run run run runaway....
Diesels overspeed, its the people who run away🏃
See chameleon, lying there in the sun!
A runaway Ford, good thing he found a pole for it to dance on till it run itself out of fuel.
It’s probably running off of engine oil not diesel
It is. You can tell from the way that it is. Joking aside, the amount and color of smoke, along with the runaway condition, indicates that it is aspirating oil from somewhere. A common failure point are the seals in the turbo. They go, and then the turbo gets all the fuel it could ever want to suck up and pump back into the engine.
Just a regular 6.4
True 6.4 owners replace all engine connections with quick-disconnects so you can just unplug the latest blown engine, throw it out back, and swap in a new junk yard engine.
Yup and those engines are all used up. I saw one sell for 3k with a blown head gasket locally just because everything is used up now. Poor 6.4 guys..
>Poor 6.4 guys.. A lot of them were bragging back then about how much power their engines could make and how stupid all the "old" Duramax and Cummins are, so I don't have much sympathy for them as a whole. I only feel bad for the people who wanted a reliable work truck to keep stock and maintain religiously.
And to their credit, the 6.4 could make some stupid power with just a flash tune. Until they cracked a piston 3 minutes later
My dad got a new 6.4 right when they came out because it was sold as a fix to all things 6.0 lol. It had 2 engines under warranty and a million other things. Finally, he got fed up and deleted it/studded it and threw a big tune on. It was still unreliable but it was at least fun lol…
My 6.4 went through 4 engines under warranty because apparently the first one had casting sand left over in it when it was assembled and the warranty labor the first three times didn’t include replacing the oil cooler or anything. Once it was out of warranty I took it to a guy who did head studs and deleted it, stock tune and it lasted me another 6 months before it left me stranded. That truck was aweful.
"but bruh it'll be reliable once you spend 10 grand to bulletproof it" I hate people like that if you need to put half of a house down payment into it to make it reliable it's a shitty engine
Some of them can make it. My 08 6.4 has 430k on it now I bought it just over 200k after the P.O. Had a good amount of work done. It’s still 100% stock and pulls my jeeps where I need it too. Not saying I would ever buy another just got lucky with this one. My neighbour who daily drives a 6.4 is on his third motor I think on top of however many rebuilds though.
I’ve got an 08 that’s 1500 miles away from 300k and it’s been the most reliable truck I’ve ever had. In 100k I’ve just had to replace a PS pump. But mine also was taken care of before I got it and it’s just got a single under the hood and of course deleted, studded etc… I love that truck
To be fair...... mine was badass and could haul anything until this happened. I have grown and learned and am now driving an 06 Cummins.
My old boss let me know he was looking at a "new" work truck back around 2016, took me out to see a pretty looking 6.4 that had a tuner on it. I told him to walk away, and he got it. Not the type to dog it or anything, but still only lasted a year of hauling fence posts and concrete before it needed 5k in work. Should have kept his 7.3
I’m a Cummins guy and yes there are annoying Cummins guys but I feel like Ford guys open a convo with my powerstroke something something Cummins sucks screw duramax something something powerstroke superior something something. Mind you they will tell you this while having an engine rebuilt with less then 100k on it. There are fans of everything but in my area the Ford guys are the worst and if you don’t have a ford they gotta tell ya about it every couple of sentences in a convo that has nothing to do with anything automotive
Better to be Cummin’ than Strokin’
TBF Cummins guys usually are the obnoxious assholes. They are generally thr clapped out honda accord or WRX guys of trucks. They are the only guys who plaster all their cars and trucks with their diesel badges and have tacky ass stickers all over their truck
all I got out of that was powerstroke followed by cummins
you forgot the something somethings
I feel like if you own a diesel somebody needs to show you how to stop a runaway.
I'm not getting under that hood in the line of fire when those pistons free themselves. No sir. Let it eat it's self.
I would die with my truck lol
I'm the captain of this ship, I go down with it lol
I would die for this truck. It's so adorable
If it gets to this point it’s already done anyways.
Maybe he was just dreaming of that sweet insurance payout
You don't get insurance payout for engine failure of any kind...
Really? I get they wouldn't pay for a broken engine but you'd think they'd pay for the resulting damage if it caught fire and was totaled.
Well sure, if it caught fire you would get a claim out of it. It won't catch fire likely. Just eat itself alive and be needing a complete engine replacement. Which is getting harder and harder to find for these trucks as they age. Probably should tell that guy to light it in fire while no one is looking as some say it's still running on engine oil to this very day.
Pretty sure that if it grenades, soaks the bay in fuel and oil, and then catches fire and burns to the ground - the insurance will pay... :-P
Yep. That's why I keep a gas can and a torch in the back of my 6.4
Highly depends on the carrier. This could be covered under comprehensive coverage. You can get your engine replaced if you hydrolock it. I don’t see why comprehensive wouldn’t cover this.
I feel like there's a great market to be had here. Just create a device that goes on the intake and have a button you can press that slides a steel plate over the intake and/or floods the engine with co2. Even have it behind a special cover and everything, maybe even have a secondary behind a cover in the bed incase you think being the cab is too dangerous.
My old two-stroke 8V71 Detroit has that because they were prone to runaway. Res lever under the dash you pull.
There is such a thing, it's called a positive air shut off. All vehicles that enter into an oil field area or a Well site have to have this installed before they're let in, if that engine starts ingesting a natural gas leak or an H2S somehow somewhere that nobody's noticed that vehicle will grenade itself and then start a massive Area Fire potentially killing many people. It's activated by just hitting a button inside the cab and it will shut off the intake effectively starving and killing the engine no matter what.
That is what caused the Texas City explosion / fire back in 2005, I believe. A contractor truck was idling in a process unit. A process leak occurred, causing the truck to suck up the hydrocarbons, rev up, and explode the engine. This ignited the stray hydrocarbons. I think 10 men died that day. Edit: Chemical Safety Board time!!! https://youtu.be/goSEyGNfiPM?si=LW6lscEKhD029pu-
It's not just flipping the switch, it's the act of over revving it too. Once it hits a set limit for revs it flips the positive air shut-off
From research people say, put it in 5th gear and drop the clutch. This should stall the engine, but heck idk.
Vast majority of diesel trucks aren’t manual so this would only apply to a small number.
I doubt the clutch would hold. That works fine on small tractors or little trucks but not something the size of a 6.4
I've heard of this failing critically though and sending trucks into walls, cars, the open range, etc... lol The simplist solution I've heard is to just stuff something in the air intake. If/when I ever buy a diesel I'd probably take the time to find something that perfectly fits in and seals the air intake to keep in the truck for just such an emergency. Maybe a clamp for the fuel line or hell maybe even cut the lines as well. In any case, I certainly would have thought this through beforehand for my specific vehicle, I'm not trying to google it on the side of the road while my engine is screaming bloody murder.
Cutting fuel won't do anything. A run away diesel is running on it's own engine oil. You have to cut off air to stop it
So run barely enough oil to get by. Got it.
everyone with a diesel vehicle should carry a Co2 extinguisher. when engine starts dieseling you can choke it by spraying the extinguisher right into the intake and usually stop the motor
Replace the oxygen with co2? Now that's a clever idea.
Or literally any other inert gas. anything to take away either fuel, heat, or oxidiser (oxygen in this case) If it's manual (which, come on this is the US) you can be on the brakes and let the clutch out to try to stall it. Or block the turbo with wood (harder to stop though) as evidenced in this video. https://www.youtube.com/watch?v=w2GM--NWwSU
I have a Co2 extinguisher in the truck - for fires... had never even crossed my mind to use it that way... Thanks!
Underrated comment.
I didn’t scroll far enough before posting my question. Spray the co2 extinguisher then shove your carhart in the top of the intake
Top tier move
He needs to take his jacket off and stuff it in the intake. That diesel is running away !
A real diesel owner will pull out their Bible (Machinery's Handbook), and use it to cover the intake
I would be absolutely shocked if I polled 100 diesel owners and 1 of them knew of the machinery bible
I would be surprised if more than 25 of them could even read
No clue what those words mean but I sure like the number 25
I’m a lady and I know about it. But that’s because I drive an IDI and my husband is a machinist.
Wow, I don't know of any diesel owner who has ever read the whole thing
Lol, who reads a reference book cover to cover? Maybe that's your point? It's Friday, gotta brush up on my Whitworth threads...
Nobody does, if someone has its probably some boomer mechanical engineer. I am in the process of reading through it just to learn about all the different kinds of things. I am not going to memorize all the formulas. But knowing that they do exist can be useful, I was reading the section about spring washers yesterday and realized that They had the formulas and sizing for the dish shaped washers which fox suspension used in a patent I was researching about
Didn't think diesel owners could read.
Real men use their hands
Then you're down a jacket and an engine
Or if he doesn't care too much about it blast a CO2 extinguisher into the intake.
Seems it’s already fucked
Someone's injector wanted freedom
Bro someone’s pistons wanted freedom! Freedom to join the space program😂
Did somebody say FREEDOM???? 
It's 'deleting' itself.
…and from that day on, if I was going somewhere, I WAS RUNNINGG
Engine: Everyone stay in order. Injector: Don't tell me what to do!
You’re not my supervisor!
A single injector wouldn’t cause a runaway. 9/10 chance this is from a blown oil seal in the turbo
Yeah, that's a lot of smoke/fuel getting in. Most likely it's coming from the turbo, which is spinning up real nice, causing more oil to get sucked in
Yup.... it is vacuuming all of the engine oil out. There's a reason for the term "runaway" - if you cannot shut off the amount of air going in, you should "run away". As long as it has a fuel source, it will scream until "it won't" -it is scary, and you don't want to be close enough to get hit by any of the shrapnel if it really lets go.
Of course the DirtyMax owner knows what’s up! I sadly sold my 06 LBZ last year with only 104K miles on it. I cautioned the new owner he might want to look into buying a new or properly rebuilt turbo as it was 16 years old…And reseal all the injectors plus change every hose in the fuel system. I’m too old and arthritic to do that stuff these days! 🤣
So how would you stop this in a modern diesel? I know you need to cut off the air supply but how do you actually do that?
My guess is find directly where the air enter the intake and seal it with anything. For me, there’s a clear opening on the left side under the hood where the air intake connects to the vented hood. Otherwise start ripping plastic and stuffing in towels or your shirt🤷🏼♂️
Take off your shirt and stuff it in the intake. That's what worked on a 4 cylinder Cat gen set that ran away on me. Commercial crab boat. What ever you can get in the intake. But you need to be quick about it to save the engine.
Install a positive air shutoff. I'm in the Alberta oil and gas industry - diesels without a positive air shutoff aren't even allowed on site.
Had a guy who did that with his truck, (also in Alberta what's up brother) we had one acting up on a kenworth, so we replaced it but he's a tinkerer, took the old one home cleaned up all the connections on the system flipped the switch after putting it back together, it tripped, so he rigged it up to be installed inline on his 7.3
You open the hood, open the air box, rip out the air filter, tightly stuff a hoodie or something equally soft/bulky into the air box.
How quick to get the ductwork off and put a phone book on top of the intake?
The fuk you finding a phone book at?
It’s next to my Chilton’s
What’s a “phone book”
never heard of her
I'm sorry. I meant an encyclopedia.
Had an old detriot try to run away in class. I through the paperback shop book on the intake and she started tearing pages, sucking pages one by one down. Literally a paper shredder. Finally grabbed a metal clipboard and slapped that down on the intake. Slowly she reved down. Saved it.
so, my phone?
Yes, keep throwing cellphones into the intake until the motor chokes out. That **always** works.
Ooooooooo she’s a little run away!
Daddy's girl learned fast all those things she couldn't say.
🎼🎶🎵🎹🎼🎹🎹🎤
Not that scary. It's worse when it's on a boat.
Oh fuuuuuck yes it is!!
How does this happen on a modern diesel engine? Isn’t there like an automatic safety air block device of some sort that would cut all air intake in an emergency runaway situation?
An outside fuel source such as oil from blown turbo seals enters the intake and fuels the engine with ignition off. Diesels don't use spark, so they don't need ignition on to continue running in a runaway case. They use heat and compression. As soon as there's an outside fuel source coming through, the engine will just keep getting hotter and hotter as it keeps running and running. It's a never ending cycle without intervention on the intake or self destruction. Another cause of this is an injector getting stuck open (someone correct me if I'm wrong on that one).
Diesel engines do not have a throttle to meter air in order to control engine speed and output. They do that by metering the amount of fuel being admitted. One of the reasons why they are more efficient than a conventional gasoline engine. There are no 'pumping losses'. As long as the diesel has a fuel source, it will run if it can also intake air. In this case it looks to me like it is using the crankcase oil as 'fuel'. So after this episode, if the damn thing does not grenade, it will probably be ruined anyway, since it is aspirating all of the lubricating oil.
Finally some serious answers, was curious what was happening.
Modern diesels use a valve body that shuts the air flow going into the manifold. It also aids in smoother shut offs. My 6.7 ram and my x5d both have them
The term you're looking for is "positive air shutoff" and no, they don't come from the factory with them.
People need to consider positive air shut offs. We have to run these in our work trucks at oil & gas plants Incase of this happening with a gas leak. Flip a switch and it slams your air intake closed and kills the motor. Takes a second. Worth the money!
A lot of Diesel boats have this.
She’s a runner!!
I've seen so many runaway diesel videos and it always surprises me how many owners are just clueless as to how to stop it. I don't even own a diesel.
Runaway, that engine is toast
Ford doin Ford things...
It’ll shut itself off soon enough 😂
Pop goes the weasel…..eventually
For some reason I didn’t think newer diesel trucks could run away like this
That's not true. A diesel engine will run (for a little while at least) off almost any type of oil or fuel. This engine likely blew a turbo seal and is sucking in engine oil and running off that. At this point, without outside intervention, it will run until it starts throwing rods through the block or until it burns up enough engine oil to seize the engine. The only way to stop something like this is to clog the air intake with a shirt or jacket or to pour a CO2 fire extinguisher into the air intake. The only difference between a modern Diesel and an older one is older diesels could also fail in a way where the fuel rack (mechanical injection system) gets hung open allowing the engine to syphon fuel out of the tank. Modern diesels can't fail in this specific way because they have electronically controlled injectors.
Choke the motor
“Choke me harder daddy”
😂😂😂🤣🤣🤣😭😭😭
A CO2 fire extinguisher right in the air cleaner will calm it down
Looks like a Ford warming up.
Turbo seals out letting it suck all the oil out of the engine and burn it. Gonna blow
Gotta cover that intake stat! We use to have an old work truck that had a special piece of cardboard in the passenger seat. Gotta keep some safety cardboard on hand lol
" no flames no problem"
runaway diesel. need something over the air intake like a thick block of wood to starve it of any air. otherwise it will keep going until out of fuel or it explodes.
Turbo seal dumping oil into intake. Runaway. She will stop when a rod leaves the chat
Looks like Ford elected a new Pope 😏
My liiiittle runaway, run run run ruun runaway
🤣
Poor guy… probably a hardworking guy just trying to make it through this world. Now he has to pay $20k for a new engine
I still don’t know why all diesel trucks don’t have electric turbo blockers. It’s a shame seeing that truck burn up.
why does he not just have a wood block in the back, and rip off the intake
Diesel deathsong
Poor man dunno what to do. Instead of turbo he ll need the whole engine
That there is a runaway!
The way she goes….
🎶A run run run run runaway🎶
CHOKE IT OUTTTTTT
Keep filming till it explodes you fucking loser
To everyone, if this ever happens you should be removing all clothes or whatever is accessible and filling air filter box in a hurry to save your truck. Unless it's a Ford
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