NOTE: We make these videos for fun. We don't make money from this channel, and don't bother with adds on our videos either. We have no budget to buy three cars and do the test 3 times. We make a video of a vehicle just before it goes to scrap. We do the best we can within our budget (zero) to provide the most information we can. If you want us to test again provide us with a vehicle and we will !
my dad drives a wrecker with a cat diesel in it. turbo seal failed and it ran away. he used a breaker bar to pry the intake hose off while it was running and it died without boost or oil from the broken turbo.
When I went to Universal Technical Institute in Phoenix Arizona, for Automotive and Diesel technologies, there was a run away diesel engine that a student had rebuilt. The student panicked and grabbed a Phoenix phone book, which is about 3 inches thick, and attempted to cover the inlet port. The engine was running so fast that it actually sucked the phone book into the engine shredded it into confetti and blew it all over the school compound!!!! It was kind of unnerving how quickly it pulled the phone book thru!!
I am sceptical. The engine can only produce a certain amount of vacuum no matter how hard it is revving. Must have been a pretty pathetic book. This is a real runaway engine stopped with a plastic cover which he finally gets properly sealed and the engine stops. I would personally be very wary about putting my hands anywhere near the turbo in case they get shredded. BTW this is in a class too! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-HSW-dkcszLE.html
Being a mechanic and working on a lot of 4WDs in far north Queensland I have encountered run aways before, generally a big fist full of rags or t shirts stops it quickly, but the one that will catch you out by surprise is when they run on backwards!!! Exhaust system full of diesel from a faulty scv, turns the exhaust into an intake and blows it all out of the intake pipe, takes a few moments to realise what is going on and that you need to block the exhaust off haha
Reminds me I've seen a video about some crude oil running tractor (2 stroke) that you really needed to take care if the engine would be able to go uphill or not, cause if it stalled mid way and started to roll back, the engine would start to run backwards and pull it harder downhill. Not the same deal (as it's not exactly a runaway) but a kinda similar situation, it's interesting tho that while 2 strokes used in big ships are indeed stopped and reversed for the propeller to run backwards, the runaway principle could do this to a 4 stroke as well, nice addition.
I feel like these tests are the definition of "beating a dead horse" you said it had a hard life and now you're just killing it lol. Great tests though!
I used to work as a diesel mechanic for the US Government. Had a 5-ton run away on me once. Hit the intake with a CO2 extinguisher to stop it. Worked like a charm and the engine survived too. I used to be skeptical about using CO2, because it comes out so cold. Figured hitting the hot pistons and valves with such cold temperatures would cause damage. But if you think about racers and the use of N2O in cars you realize that the engine must be capable of taking it.
40 years ago I learned to always have a Co2 bottle ready when starting a diesel in the shop, especially Detroits (2 stroke) which start with the rack wide open. Also diesels can runaway from oil leaking from the intake side of a bad turbo.
So after watching this video what I learned is that if my diesel ever goes into a runaway condition I should take the oil cap off and keep replenishing the engine with fresh motor oil so that the engine does not run dry and damage itself. :) Thank you for the tip.
In the Army we had a 2 1/2 ton truck, injector pump failed wide open, linkages etc had no effect. We tried the high gear and pop the clutch, just burnt the clutch up, no difference in vehicle running. Block air, could not get a good enough seal. disconnected the fuel line (injector pump issue remember?) that finally stopped it. The engine sucked all the fuel from the lines and filters in just a couple seconds, that is about 4 gallons of diesel in just a few seconds. Not a runaway by the burning it's own oil definition but it could not be shut off any other way.
Makes sense, I think a normal runaway (as in burning lubricant) could be stopped with the clutch thing, because the oil is not as good of a fuel. But if it's locked injecting actual diesel then it's pretty much at it's peak power output too.
Popescu Robert what is the problem with 2½? It's just as readable, and (at least for some of us) the ½-key is on the keyboard anyway, so why not use it instead of wasting an extra keypress?
Fire extinguishers work pretty well, seen a couple of trucks run away, go nuts with the extinguisher, if you run legal you need one anyway. A powder extinguisher will plug the filter and snuff the air and a CO2 will smother the fire inside. We had a screaming truck and hosed it with the powder. Swapped the turbo, changed the air filter, gave the side of the truck a pressure wash and the good old DT466 was still running 2 years later. So don't spray powder directly into an engine without a filter.
Here is a tip for you, from one old mechanic to another. A halon fire extinguisher will work on a run away engine. I know because I use to keep one in the shop back, when I was working in a full service, service station which are pretty much non-existent for the most part now days. Now Halon is a "Clean Agent." as defined by the National Fire Protection Agency. And it is a liquefied gas, and it does carry a ABC rating, the nice part is that because it is actually a gas instead of a powder it will not damage the engine. Which is why I kept a Halon fire extinguisher on hand all the time, as it meant less repair work if a car caught fire in the shop. And yes that does happen, when a car backfires through a naturally aspirated gasoline engine. So it should work on a Diesel engine as well, for cutting off the air supply.
I can imagine that Halon would work pretty well, but, as a CFC depletant it has been banned in Europe for over 10 years and is unobtainable. I don't know about the US or AUS. The replacement argonite or FM200 extinguishant gases that are used to protect data centers might well work but they don't tend to come in handheld cylinders like Halon used to, principally because they are fluorinated gases and very strictly controlled
Halon is only used on aircraft in aus atm and specialist industries from what I know...... and if you ever let one off the paperwork is biblical..!!. stuff kills a fire, ultra fast though... kills the oxygen.. fire gone in like a second or two... extremely effective!! However not so great on mother earth...
Many long years ago I bought (cheap! cheap!) a badly maintained high mileage Rabbit (Golf Mk I) diesel that had worn out rings. That allowed the pistons to suck lube oil from the sump at speeds above about 55mph/90kph. Who knew that diesels could run so well on 20W-50 oil? So I rarely drove it on roads with speed limits above 45. A couple of times when I did, "run away" became very real and very scary. It would keep accelerating with the throttle closed. Never had any problem slowing back down using the brakes, but I did have to push the pedal pretty hard. After a couple more years as an in town only car, the cam belt eventually broke and to the junk yard it went.
I feel like the block of wood would work on an actual runaway though. You guys were testing with the proper fuel ratio of a running diesel using it's injection system. A runaway will typically not be burning injected diesel but whatever engine oil it can suck in and in a quite rich mixture going by all the smoke you typically see. I think the block of wood will change the mixture parameters enough to stop the combustion. Anyway, nice video guys and thanks for the effort!
Just discovered your channel. You remind me of a guy I met when I was still in the service ( US Marines) and we spent a couple months playing cowboys and aboriginals in the bush in Queensland. He was a real stand up guy, but we lost touch after a while. Gotta tell you, the best time I had there was a weekend I spent on Great Keppel (spelling?) Island Resort. Totally loved your country while I was there. Some of the most beautiful women I have ever met. I subbed because I really like the way you keep your humor about the situations that you create.
There are tons of runaway diesels on RU-vid, on some of them a mechanic was standing by and knew exactly what to do, every successful stop I've seen was by blocking the intake, every single one. On several they stick a bunch of rags in the intake, some others stuck a solid object like a book on top of the intake, in all cases they reacted quickly before the engines had a chance to reach peak rpm, those items might not have worked if they had waited, but the fast reaction worked. I have no doubt a good Co2 extinguisher would be an excellent choice, the important part is cutting off the air by some means. Your simulated method where you just raced the engine, as they say for entertainment only, certainly applies here since a true runaway is far different.
Michael Cuff True ! My Father in the Navy was faced with a run away 6-71 in a boat .... the men could not kill it until they "fed" it a bunk mattress !
Michael Cuff ...I have seen an 8v71 blow pistons through the hood... These engine have an injector hang wide open, and nothing short of god can stop them....when we ran the rack on these engines, start up always took to guys.. One to turn the key, and one with a 3 pound hammer, to knock the fuel line off the head, if the rack hung and it ran away..
i like all the complaints about not enough revs and not a true run away, but you demonstrated perfectly what works and doesn't work without destroying a perfectly good engine, anything that works or doesnt work at low revs should do the same at high revs
Justin_Pirates_Rc ...this is a synchronized tranny..when putting it in gear, each gear has a brake on it to slow down the transmission and allow you to get it in gear.. Semi truck transmissions do not have that feature, and you shift them without the clutch..trying to get one of these transmissions in gear, behind a run away diesel is almost impossible. Most semi trucks have a clutch brake, to stop the transmission, to engage 1st gear, while idling.. The most important thing to note here, is this engine is in no danger of exploding and killing you.. I have seen an 8v71 detroit, blow pistons through the hood.. Takes balls and no brains, to sit over a bomb, and try to kill it..
Justin_Pirates_Rc: Those are very realistic comments. You gotta remember that a lot of todays diesel trucks can easily be tuned to over 1,000fT LBS of torque, you don't just put that kind of power in gear and stop it with the brakes. Testing that on a diesel VW Rabbit is not even in the same galaxy as testing on something with very high power because to have that high power you need massive amounts of airflow. One of these bigger engines can ingest your hand if you try to stuff a jacket down the intake.
The whole rag idea generally works. I was working with my grandpa on his 2002 Cummins diesel and with all the fuel in the air in our shop started it into runaway mode (accidentally) and he threw a small pile of rags into the intake and it managed to stop it.😁
@@MINIPOTHOLES Totally - put it in gear and slam on the brakes. It will stall immediately. That is why you can bump start a stick shift but not bump start an automatic. There is a direct connection between all the moving bits on a stick shift. There isn't on an automatic.
Cut or crush the turbo oil feed line. It runs out of fuel, combustion stops, hopefully before the crankcase runs dry. The hot oil bath wouldn't be fun, but you'd have an engine.
Jafromobile your approach works great but I experienced another type of runaway... injector pumps were built in head, and leaked. oil sump filled with mix of diesel and oil and was sucked in into intake by sump ventilation.... oops...
OUCH! That sounds like a disaster looking for a place to happen. :( I don't think I'd attempt my method unless I knew the turbo was failing (in other words, if it was my diesel engine and I had seen it/smelled it smoking prior to the runaway). Doing this to someone else's engine would probably just make them blame me for helping them, knowing my luck.
Yes!!! Finally somebody who came with the engine stall!!!!! Yesss!!!!! Jackpot!!!!! I am sick of those nonsense air intake block and the blahblah stuff! 99% of the peeps eeven dunno where it is! But throwing the last gear and dropping the clutch at once whithout a blink? Noooo, this hits no one' brain! Congrats on this simple solution
In a true runaway , a diesel engine can rev over 10,000 rpm, producing up to 10 times its rated output. I have never once heard of anyone successfully using the clutch killing a runaway. It burns the clutch up in seconds. Big trucks have 2,250 ftlbs clutches and will no way hold a runaway on a 16 liter engine. The problem is, the clutch is only made to handle just a little more the the engine puts out normally. I have never seen a dyno runaway but i have heard around 10 times the hp and torque before the blow up or lock up.
Had a runaway diesel a few months ago, pretty scary, it was in a boat so no way to stall it by clutch drop! The air filter assembly faces down and I bottled out of taking that off in case it threw something through the crankcase. Fortunately the answer was to keep it in gear to stop the revs going crazy and it soon calmed down. This was not an injector or turbo failure it was someone tthat serviced it had put too much oil in. It was running fine until we hit rough water, horizontal cylinder, engine at an angle.
This is why I believe turbos need an emergency oil shutoff. Turbo might end up getting destroyed but its still way cheaper to replace a turbo than an entire engine in most cases. That is if the vehicle is even worth it by then.
....Turbo already needs to be fixed if it's due to oil bypass in the turbo itself. So, no big loss there anyways. Now, if you shut off the oil to the turbo, and find it's your fuel pressure reg or something....then damn, you killed your turbo, and the engine is still going...
Chris Marek... all the older 2 cycle Detroit diesels had an emergency kill lever in the cab...it was a flap on top of the blower, that when released, closed off all the air suppy...engine would not run, until you reset it..
@@Stacy_Smith yes. My 90s Suzuki Vitara td has an intake valve that shuts off with the ignition, in addition to the fuel shutoff. I test mine regularly, and it stops the engine pretty much immediately but smokes a tiny bit in doing so, which is understandable as it's choking the air supply causing the injected fuel to not burn for a few cycles.
Running a 12V-92 on a dyno one time, guy in the next cell had a little 4-53 run away on him, open blower intake. He grabbed a bunch of shop rags, threw them at the intake. There was a big bang, room filler with red confetti, engine stopped, but the blower fell off the side of the engine in a few pieces. Cutting off air will always stop it, but have seen it invert old blower seals.
The rag does work it saved the day for me on my old landrover when the fuel injection pump failed. I stuffed my jacket over the air intake and it stopped it virtually straight away saving the engine
Luckily this shouldn't be a problem in newer cars, most new cars have an Anti Shudder Valve built into the EGR valve, I have a 1999 VW Polo TDi and even that has an ASV! this fully closes when turning the key to the off position blocking intake to make a vacuum in the cylinders for a dampened shutdown!
Funnily enough in all the fires I've dealt with the powder did far more damage than the smoke and flames combined! It's impossible to get rid of, I'm still finding the stuff at the back of the kitchen cupboards even now. Foam FTW - less mess.
I once saw a containerised V16 32Lt. diesel genset runaway, it revved so hard the flywheel exploded & killed the mechanic inside the container, a 1,500 rpm engine revved to 6,000 rpm because the governor was jammed. Bits of flywheel became ballistic after killing the poor bugger, they came through the steel container walls & injured another 3 guys, jeezus what a mess it was.
block the exhaust. You don't have to block it completely. Get enough back pressure on it and the turbo slows down. If you happen to have a potato handy and ram it into the exhaust one of two things will happen. The engine will stall or you you will have a high speed potato projectile.
Thought of this also. you would have to stop it right at the turbo, and completely. trying to shove a potato in a non runaway TAILPIPE would be difficult
BrianBell4073: Give it a try on your gas engine running at 2500 RPM's and let us know how that works out for you, or does not work out for you in this case. The one fail safe measure that works every time is to block the intake air with either a thick chunk of wood or at least a 3/8" thick steel plate.
Not too much, at least on leaving it in gear and stalling it. I had a Diesel VW Rabbit run away on me while driving down the highway. I got it pulled over, put it in gear and stalled it with no problem.
I'm a Marine Engineer. I've had several runaways. Turbos will do it, as you said. Leaking diesel past injectors, lift pump, injector pump on a non-turbo engine will result in engine oil getting too high. This in turn starts to blow out of the dipstick and crankcase pressure can force oil into the intake via the breather. The engine revs faster and faster and is only limited by the physical constraints of reciprocal mass port sizing, etc. CO2 extinguisher will work. Clutching doesn't work on a boat but would burn out the clutch generally, on a car. Best way I've found is to take away the air by putting your hand over the air intake on smaller diesels. Trust me, it doesn't rip your skin off, give you a rash or cause cancer! If air is getting past through the breather, (if mounted below the intake), then this won't work unless you block that as well. Another way is to cut the breather so removing the fuel supply. Cutting diesel supply won't do a thing as it's the engine oil that is being burned. Steve.
So, I live in the states. Our common diesel Semi Trucks have 15Liter engines with 10 speed transmissions (5 gears and a hi/lo splitter). The transmissions do not have gear synchronizers so if your truck is sitting and becomes runaway, you can't get it in gear. Most become runaway engines while moving and we have a duty to protect the public so we typically try to pull to a shoulder or get away from large groups of people. Also, I'm not a mechanic, but I was told there are high pressure and low pressure fuel lines so cutting fuel lines is dangerous if you don't know what you're doing (the high pressure can cut through skin like a razor). And finally, most runaway engines catch fire before we can get the engine hood popped to try to do anything. As far as farm diesels and heavy equipment diesels....I imagine they would have trouble getting to the engine before a fire started. Ultimately, there will be some damage. It sounds like a CO2 extinguisher is the best choice, I just don't know how much it would take on a 15-25Liter Diesel. Great experiment though. I've heard wood and a rag...now if it happens...I'll go straight for an extinguisher!
I work on and hot rod the old 2 stroke Detroit's Use a CO2 one If some one has removed the emergency stop air flap on the blower those old things can if the rack jams the scream makes every one crap there pants and run I also put a quarter turn valve on the suction side fuel line for that reason you can turn one about 3200 and not scatter it I set them a 3K on the stuff I fool with .
Never cut the fuel lines on any diesel engine no matter how old. Even pump line diesels like the DT360 and 6.9L Ford/IH V8 have a fuel pressure high enough to cut through skin. Common rail diesels now a days are running fuel pressures of 20-30,000psi. When this happens 99% chance you're gunna lose that limb. With a runaway the engine may not even be running on diesel fuel. If it is turbocharged it'll probably be running on oil from the crankcase. If you're in a manual transmission vehicle don't put in high gear and dump the clutch; you'll just shatter the disk. Rags in the intake are a hit and miss as most people don't have multiple thick clothes piled in their cars/trucks they'd just be willing to throw in the intake. Block of wood over the intake is most effective, but who(other than a select few who know the trick and how to do it) just carry around a piece of flat wood big enough to cover the intake? Pulling the oil line to the turbo would be another logical choice, if you happen to have the right wrench size for the flare nut and enough time to sit there and turn 1/4 turns until it starts spraying boiling hot oil at high pressure everywhere. And it's still not even off yet. A valve in line would be great, but that's a lot of pressure. Ball valve would be minimum. If you're running a turbo diesel a CO2 extinguisher is the best option of all of them. NO harm to the engine, they can be very small for smaller cars/storage, they're easy to use.... Not terribly expensive either.... $100-$200 is a nice safe insurance against a new $5000+ engine..... Just food for thought, and my personal experience working with diesels.
Runaway diesels rev much higher when running on their own oil, as the fuel/oil isn't regulated. I seen one blow a clutch when putting it into gear and then carried on running to put no.1 Rod through the block
It's great to hear all of the ideas regarding the stoppage of runaways by cutting off the oil line to the turbo. The unfortunate fact is that you don't have to have a turbo for a diesel to runaway. If the oil scraper rings fail a diesel will runaway fueled by it's own engine oil deposited on the sides of the cylinders.
@@velianlodestone1249 Make sure that it is a CO2 extinguisher. Dry powder extinguishers make a mess. Water/compressed air extinguishers are a recipe for bent conn rods.
Justin Dennis To let you know all diesel engines have no vacuum because they have no throttle body that is why all diesel engines and most direct inject gasoline engines have to be fitted with a vacuum pump to all the extra crap that we have like brake assist and EGR valve work properly.
Jonathan Furtado there has to be a pressure differential (what most consider to be vacume) or it would not run. even with forced induction, there is the moment at start before any boost is being made, that requires vacume to fill the cylinders.
Tanner Marlow Yes the cylinder does make a vacuum on the downstroke when the air intake is open but there is not a vacuum generated that would run the brake assist and everything else that a gasoline car would normally have and even in some gasoline cars they have to put a vacuum pump on it
Don't forget that the air intake happens at the same time that ignition happens on another cylinder, there is a *lot* of force behind that, so a small leak can handle a lot of air. Also, the inlet system wil act as a buffer for air between inlet cycles, it will be sucked vacuum during a stroke, and has time to recover through the leak while the cylinders are not taking in air.
Remember that a turbo engine with no turbo has very little power, add to that it's running on oil, which is less efficient and will produce less power. My guess is the block of wood would work and the rag would likely be stuck at the same broken turbo.
if you got a pocket knife just cut any of the turbo boots or carry a co2 or Halon gas fire extinguisher the dry powder ones will work if there is a good air filter it will plug it but still more chance of engine damage with the powder. i use to work for had a 12v cummins runaway in the shop after a fresh rebuild on the first startup the owner gave us the rebuilt turbo to install on it but was missing the oil seal when it was rebuilt. anyway he just smacked the turbo with a full swing of a 3lb slug hammer it snapped the turbo off the exh manifold and it shut right down. it cost a turbo but not a engine that he just put 10k in building. long story short you need to stop the air from the turbo getting to the motor and the runaway will stop and there is a lot of ways to do that. thanks for sharing
just a side note. on a larger engine that is turboed or blown will die more effectively with a block of wood. for example a 2 stroke detroit pulls air at such a high vacuum (many DD's are blown and turboed) that the block of wood will seal the intake. the vacuum is so high infact, that if you fail to completely cover the intake, you may not have the time or strength to pull it off and try again.
G Crauwels runaway and overspeed are not the same. Often one will lead to the other. You can have a runaway diesel running at idle speed. Runaway simple means that you have lost control of the engine and have no method of slowing it down or stopping it. An overspeed is when the engine is running at speeds higher than it is designed to handle and most often comes from faulty fuel control systems.
A lot of the old 2-stroke Detroit Diesel engines had a plenum that attached to the blower. Inside was a metal plate with a spring loaded mechanism. Some had an emergency shut down solenoid or cable that you could kill it in the event of a runaway. Some of the engines that were in generator applications had a mechanical speed switch that would energize an electrical solenoid to slam the plate closed. We see some newer class 8 engines come into the shop that have run away or ran backwards because of injectors that hung open. I have only seen a couple turbos fail on the compressor side. One of the easiest ways to kill a truck that is running away is put it in 10th gear and dump the clutch with the park brakes applied. Just better hope the customers slack adjusters are working.
CO2 Extinguishers are pretty widely available and would've done the job. CO2 displaces the oxygen, kills the engine. It also wouldn't have damaged the engine.
Good video,but i wonder if you let the engine run-away, would it end blow up 100% of the cases? If there is no more oil the engine can't keep running anymore (it could be destroyed before if it reaches too high rpm)
Quickest way is put your foot over the exhaust and smother the engine insides with exhaust fumes. It works this happened to me, and remembering how we used to stop mopeds with no ignition from when I was a kid. It took about 20 to 30 secs from it happening jumping out the car and it stopping. Still killed the engine it melted 3 out of the 4 injectors and there wasn't much compression after. Don't know how hot it gets in there, but it must be high.
Actually you are better off keeping a Halon fire extinguisher around with automotive repair. co2 can be a bit more dangerous, and Halon is safer around humans then co2.
The extinguisher is not supposed to be sprayed into the intake manifold. It is supposed to be put into the intake so the powder plugs the filter. The plugged filter stops the air but also stops the powder from destroying the engine. As most of the crank case breathers also enter the intake post filter they are also deprived of air to keep running
Plugging the air cleaner isn't quite what the powder extinguisher does. Even powder fire extinguishers use CO2 for propellant. The air cleaner just protects the engine from being damaged by the powder.
Will the fine powder from a fire extinguisher. plug an air filter enough to stop it? Try it!! Folks that claim it works say to do exactly what I'm saying. But here is the proof. This myth busting used The recommended "dry powder" fire extinguisher called for in the so called myth. Why is dry powder recommended if a CO2 is what gets the job done. Co2 extinguishers exist. I am not saying that CO2 doesn't have an effect at all. It's a non combustible gas and therefore replacing oxygen almost entirely will stop an engine. But as you saw from their block of wood it doesn't take much oxygen to Keep running. If it drops to a sputter with CO2 and your extinguisher runs out you are immediately in the same boat. Not so if the filter is plugged with powder. But this whole video was strange. Myth busting of this type should be done with most commonly available Items and the most commonly available knowledge in the few minutes of panic before the engine self destructs. They are supposed simulate the problem to try remedies. They didn't simulate a engine oil runaway. They didn't kill the ignition which is the first common sense thing anyone would do first. Diesel fuel supplied by the pump is more volatile than engine oil. How often does the Turbo give out at a shop where you can access the shop rag they didn't use or a block of wood? You wouldn't have quick access in most times to these items. You would have your shirt to ball up and use or your pants or a jacket. These items wouldn't likely be sucked in if applied properly due to their sizes. Even a rain coat. What's more likely to have on hand when driving? A dinner plate or a rain coat? Who travels anywhere naked without at least some articles of clothing in their vehicle? Even if you yourself don't have a fire extinguisher. Look for and wave down ANY commercial vehicle they are required BY LAW to carry one. Depends on laws in the area. But Here you are required to have one in a boat also so anyone trailering a boat probably has one. If you are in the out back hundreds of miles from anyone and find your self naked with no clothing to use. look down. handfuls of sand or dirt can plug the air filter. The whole point is to educate. Common sense answers easily remembered and used by people in a bad bad situation anywhere and anytime.
Powder fire extinguishers are far more common than plain CO2 ones. They're also slightly more effective at stopping a fire in the hands of a novice. Restricting the flow of air into the engine is fundamentally different than disrupting the concentration of Oxygen entering the engine.
Powder will plug up the air filter, BUT then the air filter will just collapse and get sucked through the engine. Another reason for a run away! Bad injectors. It causes a build up of excess diesel in the rings and then the engine goes run away on the fuel being fed from the rings. This is the only type run away I have ever experienced, as I was a marine mechanic, and most marine engines especially generator, and sail boat auxillary engines are not turbo charged.
There's another video around RU-vid where an engine starts to run away and an old guy throws a balled up rag into the turbo inlet and it does shut it down, probably destroyed the turbo at least though
Johnno K as explained at the start with a runaway turbo engine, the turbo is going to nedd rebuilding or replacement as the seals are compromised and you are burning oil.
Reading comments I guess alot of people don't realize how diesels work. Diesel engines have 100% AIR all the time, it's fuel to the injectors that control revs. So cutting fuel, and you can't cut spark cuz is doesn't exist. Your only options is cuting AIR or overwhelming the engine's rotational force with ( dumping the clutch or something like it).
Nice video, make a part 2 and grab another used up diesel and do it again, this time run the engine while misting used engine oil into the intake so you can see the engine start overrunning The governor. At the end of the video give it enough oil so it shits the bed
i would find that scaring me quite a bit. I am normally confident about machines i understand, but a machine without a proper stopping possibility.. going at over 10k RPM makes me want to be much farther away than the lenghts of a broomstick. Also, when you blow.. dont do it in your own garage dude - it may put you out of business. Go to the grumpy neighbour of yours... do it there
What is available in the vast majority of all vehicles that you could use to plug the intake is the floor mats. However, the intake has to be plugged after any PCV-connection or bypass connector etc.
In manual car's you should drive off and then kill engine by using the brake. My friend once try to stop one engine by releasing clutch in hi gear. Clutch exploded and engine continued to rew.
the rag on air intake will work , I already saved a runway AX diesel like this . And even if is suck in will get to the air filter compartment , not inside the engine . no one will try to get the intake hose from a runaway engine ... On a manual Gearbox , the high gear + heavy break is the easy and fast way to do it .
generally the idea behind the fire extinguisher is that you would leave the air filter on, the powder from the extinguisher should plug the air filter, in theory it is the fastest way without damaging the engine
Baron Van Oosting co2 is a gas( carbon dioxide) using a powder extinguisher won't starve it of oxygen, its safer to block the exhaust, stop the flow of gases, and if the engine blows it won't explode in your face.
Baron Van Oosting ...no...you rob the engine of oxygen...that hoover will suck that air filter inside out and keep going.. This test worked here, due to static lock..
When I was a truck driver, I had a small Vice Grip in my side box. Why? To crimp an air line to a bad brake, and to crimp the fuel line, if this ever happened. 20 years of trucking, and never had to use it on my truck, but did once in Wyoming. Yes, it ruined the fuel line, but saved the engine...
I have had quite a lot experience with 8v71 Detroit engines. The ones with blowers. Between the intake and blower there is a flap that shuts off the air consequently the engine shuts down almost immediately. A rubber backed floor mat works well for a vehicle without emergency shut down. PEACE
Had a runaway diesel engine once while driving. Huge pile of smoke in the back, put in 3rd gear immediatly and slamed on the brakes till it stops. Changed a turbine the other day, the car was still burning the oil what was left in the exhaust. But I just went to a highway, it felt like Im sitting in a rocket ready for a take-off, but after few km it went away and it was running like it never happened.
If you do this again, you should reconsider the rag. Try it with a wet rag. Make a ball out of it and let it get sucked in. If it keeps running pour in more water. It could not be worse than the dry powder. Even if it hydrolocks the engine, it might save the rest of the vehicle (and surroundings) from fire damage...
his rag was too small... when that kind of shit hits this kind of fan - its time tp stuff your t-shirt, jacket and underpants all at once into it. Or try the detachable headrest ... full of foam... rubber floormats... your mother in law.. wahtever is available, just not a rag size of a hankerchief
The fire extinguisher method often works best, with least damage, but must be done with a C02, Halon, Halotron or other gas extinguisher. While powdered extinguishers may work, it will trash the engine. The powders extinguish fire by emitting non flammable gasses via a chemical reaction caused by heat from a fire. However a byproduct of that reaction is extremely corrosive residues left over. These corrosives will start to eat the internals of the engine as soon as they get hot. It is basically like pouring acid into the intake. And when possible, install a co2 -or halon if you can afford it, extinguisher in your vehicle,
Honestly my tech center we use blocks of wood stop runaways if there is any but our secondary choice is fire extinguisher down the intake because the powder is not compress like diesel does
Blocking the air intake does work but you can’t use something solid like a block of wood like you guys tried, use something like a pair of leather welding gloves or leather welding apron and then something solid so you don’t risk your hand but the leather welding gloves or apron works great to seal
Old diesel engines governors can stick too or suck oil in from leaking valve stem seals and run away. Had a diesel engine the other day that stood for 10 years and first start it ran away but since I knew it stood long was prepared and just loosened the injector pipes. Diesel vehicles that roll over on their sides or upside-down can run away too from oil entering through the piston rings.
Love the videos, Keep up the great work! I tuned in on the hydrolock vid and just found this one. Subscribed for sure. Personally, being aware of the possibility of run-aways, I'd keep a CO2 or Halotron extinguisher handy in my truck/van/diesel powered thing. Just in case. I usually have one in every one of my vehicles (petrol powered) because "fire bad!". (I've had an injector o-ring pop out before!) That right there is a money saver! But good to know that most diesel goers should be snuffed by the gearbox. Looking forward to more!
Eyebrows Mahoney Thanks for the positive feedback ! We are still amateurs but have plenty more " destructive testing" to do yet. Creating a video currently that showing what happens when you loose all your coolant , and what the gauges don't tell you is happening. Yeah, we blow it up
I look forward to it! I've been wanting to make videos like this but haven't had a source of vehicles to do it with. I'm glad someone finally is! Destructive testing is where it's at, you know what happens and how!
I have had to use the extinguisher trick on a tractor trailer but shot the breather pipe. Motor tried to suck the filter in. Turbo seals got fixed good as new.
I have seen gas engines run away. Throttle body got stuck open. like on a dirt bike that gets a stick stuck in the carb area or an offroad truck getting mud in the pivot points of carb/throttle body. A bunch of back yard mechanics get them as well when swapping mechanical diesel pump parts out to make more power.
Drove a Kenworth with a c12 CAT the turbo went out but they said drive it in. Soon as i pull in the yard it catches fire and starts to run away. We ended up making it die by spraying a a fire extinguisher in the air intake. Had to get a new intake housing, replace some wires and air lines. Still running to this day.
