"Speedmonkey" (Speedmonkey)
06/05/2014 at 10:16 • Filed to: diesel
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"Speedmonkey" (Speedmonkey)
06/05/2014 at 10:16 • Filed to: diesel | 0
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Unlike a lot of Jalopistas I'm not a fan of diesel engines. !!!error: Indecipherable SUB-paragraph formatting!!! when a diesel engine decides it doesn't want to die quite yet. (The original video won't embed on Kinja as it's a Liveleak vid)
It knows it will die soon so goes on a noisy, smokey rampage.
Noise and smoke are all well and good but not when the noise is diesel clatter and the smoke is full of particulates. This engine was running all by itself - even with the ignition turned off.
The devil's juice doesn't use spark plugs to run, it relies on compression. The only electrical aspect to making a diesel engine run is in the flow of fuel. But when oil mist gets in to the combustion chamber of a worn (knackered) diesel engine the engine can continue to run until it seizes.
The only ways to stop it are to block the supply of air, by blocking the air intake, or to put it in gear, with the brakes on, and stall it.
Or don't buy a diesel in the first place.
Takuro Spirit
> Speedmonkey
06/05/2014 at 10:22 |
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Runaway diesel is one of my favorite YouTube searches. They don't happen often on camera, but when they, HOOOO BOOOY is it fun to watch.
Opposite Locksmith
> Speedmonkey
06/05/2014 at 10:24 |
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my 6bt owning roommate enlightened me as to how Diesel engine can run on their own crankcase oil
TheDon
> Speedmonkey
06/05/2014 at 10:26 |
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I'm going to attempt to start my diesel that has been sitting for 15 years. Plan of action, remove air cleaner housing and place block of wood next to intake.
Mattbob
> Takuro Spirit
06/05/2014 at 10:28 |
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and now I know what i'm doing for the next half hour.
4age20vsilvertop
> Speedmonkey
06/05/2014 at 10:31 |
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#GoodToBeBad
Jcarr
> Takuro Spirit
06/05/2014 at 10:38 |
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UPS was delivering some soot today.
EL_ULY
> Jcarr
06/05/2014 at 10:47 |
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coool!!!!
vdub_nut: scooter snob
> Jcarr
06/05/2014 at 10:52 |
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I love the dude rambling on about a wrench and the battery....
Cé hé sin
> Speedmonkey
06/05/2014 at 10:53 |
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Often this happens when the turbo goes to meet its maker resulting in its oil leaking into the intercooler (if you have one) but at any rate being sucked into the engine and then you get the diesel equivalent of a chain reaction until you get conrods making their appearance outside the block. Cure is to engage top gear and the clutch. Unless you have a modern commercial truck with an automated gearbox in which case you just keep well back.
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Jcarr
> vdub_nut: scooter snob
06/05/2014 at 11:00 |
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I know, I'd like to see the look on his face when he unhooks that battery cable and she just keeps turning...
wallaby13
> Speedmonkey
06/05/2014 at 11:06 |
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The only electrical aspect to making a diesel engine run is in the flow of fuel
Oh man is this so wrong. maybe your 80's diesel but modern diesels are more complex than their gasoline counterparts. High pressure fuel systems, EGR valves, Variable geometry turbos, not to mention after treatment as well.
I think the biggest take away here to to actually maintain your car. A run-a-way only happens when an engine has been neglected.
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TheDon
> wallaby13
06/05/2014 at 11:15 |
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more like late 90's Mercedes Diesel. Mercedes used mechanical fuel pumps through the 606 powered w124. I might be wrong, I've never owned such a car, but I've had various W123's, W126's, and an early W124 diesel.
thebigbossyboss
> Speedmonkey
06/05/2014 at 11:16 |
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Diesel run away.
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wallaby13
> TheDon
06/05/2014 at 11:18 |
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Well wouldn't that mean the car could run without any electrics then?
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TheDon
> wallaby13
06/05/2014 at 11:33 |
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Yes, I had an Alternator die and destroyed the belt so I started the car and ran it on battery (after making a makeshift belt for the water pump). Thankfully it was during the day and I did not need headlights. I turned the radio off so only the turn signals, gauges, and brake lights would draw from the battery. I don't suggest doing this with a car that uses a serpentine belt to drive the water pump.
Bad Idea Hat
> Jcarr
06/05/2014 at 11:48 |
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Man, I was wondering what he expected to accomplish. Other than be right next to the engine when it decides to give up the ghost.
Provided the battery is near the engine on these trucks.
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Bad Idea Hat
> Cé hé sin
06/05/2014 at 11:50 |
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I always wondered, how far could a rod fly in a case like this.
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Bad Idea Hat
> Takuro Spirit
06/05/2014 at 11:51 |
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I did this the other day. My favorite
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Cé hé sin
> wallaby13
06/05/2014 at 12:49 |
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Yes, an old diesel with no electronics would do just that. Think of an old tractor which had to be stopped mechanically by hauling out a knob.
bubblestheturtle
> Speedmonkey
06/05/2014 at 21:34 |
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I'm not sure a relatively rare even is enough reason to poo poo a combustion format. Jets puke on themselves sometimes as well, but it doesn't mean they aren't good engines.