Overspeed<\/strong> is when an engine operated at an RPM rate over which was designed to handle. A common example is when a truck gets stuck in gear headed down a mountain and runs the RPMs so high that the engine is severely damaged.<\/li>\n<\/ul>\n\n\n\nSo, a run-away can cause an Overspeed if the engine is fueled to where it idles up beyond what it is meant to stand. A run-away can happen without causing an over-speed.<\/p>\n\n\n\n
I have seen situations where the engine was only running away while operating and it was a random idle up every few minutes.<\/p>\n\n\n\n
How can You stop a diesel engine runaway?<\/h2>\n\n\n\n Remember this is a dangerous situation. If you are nervous or not confident you can get it to shut down run away yourself! Get out of there. If, however for the brave and knowledgeable you want to stay in there and save the engine I will list the best ways to get the engine shut off.<\/p>\n\n\n\n
The right answer to this depends on the source of the \u201cfuel\u201d. We will go over both options Engine oil and diesel fuel.<\/p>\n\n\n\n
Remember, you have two choices, remove the air or the fuel. Either will cause the engine to shut down<\/strong><\/p>\n\n\n\n\nEngine oil<\/strong><\/li>\n<\/ul>\n\n\n\nIf the engine is being fueled by engine lubricating oil, then it would be best to go for the air. You need to choke the engine out.<\/p>\n\n\n\n
If your vehicle has a CO2 fire extinguisher this can work well. Spray the CO2 directly into the intake until it shuts down. This works because the CO2 replaces the oxygen and with no air, the engine shuts off.<\/p>\n\n\n\n
If you don\u2019t have a CO2 extinguisher handy go for something to choke out the intake. When this happened to me personally, I grabbed a fender cover and some rags and stuffed them into the intake, and it shut down.<\/p>\n\n\n\n
You can remove the intake hose and cover it with a book or something. But be careful it will be moving a lot of air. It will need to be sturdy.<\/p>\n\n\n\n
This is no joke. The amount of air moving into the intake at a high RPM will be very dangerous. Trying to stuff rags and things into the intake will be very dangerous. You could lose your hand. The engine could just suck whatever you put in there right up. It is better to go for a hard<\/p>\n\n\n\n
If you are running a manual transmission and you are in the cab you have another option. I have witnessed this method although I haven\u2019t done it myself, I know it works well. As soon as it starts to run away you can press the brake pedal and put the transmission in high gear and release the clutch while still holding the brake.<\/p>\n\n\n\n
This will provide enough torque to shut the engine down. You must take caution when attempting this method because the truck will move even with the brake depressed.<\/p>\n\n\n\n
Another option is to plug up the exhaust. I have not ever used or seen this method used but it is possible in theory.<\/p>\n\n\n\n
\nDiesel fuel<\/strong><\/li>\n<\/ul>\n\n\n\nIf you are in a situation where the run-away is being caused by over-fueling of the diesel fuel I would go after the fuel.<\/p>\n\n\n\n
There are quite a few ways to do this. One is to take the fuel filter off. Note that this will not immediately shut down the engine. It will still have to run out the fuel in the lines before it dies. So, some patience is required.<\/p>\n\n\n\n
Some vehicles have a fuel shut-off that can be used. Like a ball valve at the tank or just before a fuel filter. This is a good option if fuel is the culprit.<\/p>\n\n\n\n
\nUnsure?<\/strong><\/li>\n<\/ul>\n\n\n\nGo for the air. When in doubt the air will shut it down every time. So, if you are not 100 percent certain shutting the air off is a great option. Just get something to stuff or cover that intake up and she will start bogging down.<\/p>\n\n\n\n
Preventing diesel runaway<\/h2>\n\n\n\n A great way to stop diesel runaway is to never have it. As far as the prevention of run-away there are a few good options.<\/p>\n\n\n\n
\nRegular maintenance.<\/li>\n<\/ol>\n\n\n\nRegular maintenance is going to keep you from getting into a situation where things are so worn down and dilapidated that they begin to wear and allow the oil to pass and cause run away.<\/p>\n\n\n\n
\nCheck on the turbo<\/li>\n<\/ol>\n\n\n\nAnother great thing to do is pop off your intake hose every once in a while, and have a gander at the turbine and intake hose. Keeping an eye out for residue or any signs of wear is going to prevent that run-away situation.<\/p>\n\n\n\n
Summing up<\/h2>\n\n\n\n In conclusion, diesel engine runaway is a serious issue that can have dangerous consequences. By understanding the causes and taking steps to prevent them, you can keep yourself and your vehicle safe on the road. So, be sure to regularly maintain your diesel engine and address any potential issues before they become a problem. And remember, in the unlikely event of a runaway, stay calm and take immediate action to stop the engine.<\/p>\n","protected":false},"excerpt":{"rendered":"
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Why Diesel Engines Runaway And How To Prevent It - learn diesels<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n \n \n \n\t \n\t \n\t \n