Thread: Smoky D4 video

Originally Posted by DiscoJeffster

I saw this on Facebook. A D4 blowing monstrous clouds of smoke in the street. Not sure what has happened, but it doesn't look happy!

Roll Coal! - Dash Cam Owners Off Road

Runaway diesel. Likely to have been overfilled at service or turbocharger/s failure . It is a show stopper alright . The best way to tackle it is to empty a few c02 fire extinguishers into the air intake however getting up close to a screaming predetonating engine to do this isn't everyones cup of tea. Best to stand back and let her blow when it runs out of the engine oil as a source of fuel....

Justin, If you could block the side air intake (not sure if D4 has two) with a pillow or flat cardboard (or even one half of your backside) would it be enough to kill it or can it still suck enough air between intake and air cleaner box to keep running?

I know the Detroit 2 strokes were famous for this but thought it was very hard for a normal diesel to run away?

Edit: it would possible to check this solution on a non runaway engine

The comments on Facebook reckon this is the explanation:
Diesel engine runaway - Wikipedia

Originally Posted by TB

The comments on Facebook reckon this is the explanation:
Diesel engine runaway - Wikipedia

Always a reliable source of information lol.

How can it be anything else?? its a runaway,,

anyone that owns a diesel should know about this,,

it may never happen to you,, but it might to someone with you--

As Justin explained,, but do YOU know how to stop yours? or what causes it?

I have seen this a few times on the highway, even happened to a mate in a Scania he reckons he had 2 feet on the brake pedal trying to pull her up, although 2 feet would be useless on air brakes.
I drove old Macks for a few years doing a lot of slow work occasionally you would nearly stall them and they would pickup but run backwards blowing half the oil out of the oil-bath filter over the guard and bonnet, that was different the first time but a runaway turbo would be darn scary.

Originally Posted by Pedro_The_Swift

How can it be anything else?? its a runaway,,

anyone that owns a diesel should know about this,,

We had a runaway at work 2 - 4 weeks ago. Cummins motor in a Kenworth prime mover. I was amazed (and also ashamed) at how many "truckies" had no idea.

result was??