Killing a Runaway Detroit Diesel

[svtfocus2cobra]

Or rather "Trying to kill..." I should say. I thought this was pretty cool how strong these motors are. Makes sense that the water was likely atomized or turned to vapor before hitting the cylinder, but still, for the engine to lower RPM and make the water act as a cooling agent instead of a death blow like you would expect is cool to see in action.

Mechanic Tries Killing Runaway Detroit Diesel With Water but It Runs Better Instead

If you needed any more proof that these two-stroke diesels were tough as nails, then let this guy provide it with a few gallons of H2O.

www.thedrive.com

 

[Fastback]

I've been watching him for a bit. He has some great videos of big inch diesel CAT motor builds also. Always been attracted to the Detroit Diesels.

 

[BlckBox04]

he's got by far the funniest dry humor on yt.
and he knows his shit about Cats

 

[Bullitt1448]

Those 2 stroke Detroits made great power for the day but they would run away fairly easily.

 

[gimmie11s]

Awesome video... blown 2 stroke diesel. Good shit. Tough as nails!

 

[03cobra#694]

I remember the DD's have an emergency shut off that killed the intake air instead of just the fuel. No RPM limit if they got a whiff of some type of fuel.

 

[blownstang01]

Those old 2 strokes had the best exhaust note ever.

Yeah, most would have a large gate valve in the intake tract to kill the air. All they needed was a leaky blower oil seal to suck the oil for fuel and rev to the sky. I know what to do to shut it down but never actually witnessed one myself, I'd probably shat my pants and run. Video is wild.

 

[Bullitt1448]

They would occasionally lose a seal in the blower and start burning their own engine oil as fuel, the only way to stop them was to use the emergency stop, which is basically a spring loaded flap on the blower intake.

 

[Lambeau]

 

[L8APEX]

Iirc it wasnt a thing on detroits but if you stalled some of the older cats and cummins and rolled backward in gear these engines would litterally run in reverse. Exhaust, intake whatever... it'd just run (once an old diesel was running it was like stopping the juggernaut. )

 

[svtfocus2cobra]

It's ****ing awesome hearing stories about engines we've built in the past that basically defy the odds of physics and what we know to be true about them. Unbreakable feats of engineering that put all others to shame.

 

[Lambeau]

It's ****ing awesome hearing stories about engines we've built in the past that basically defy the odds of physics and what we know to be true about them. Unbreakable feats of engineering that put all others to shame.

All designed, manufactured, and in use without SLA's, CAD/CAM, 6 axis machining centers, highly refined metallurgical alloys (with ability to identify grain structure/elements), CMM, synthetic lubricants, etc.

They were truly genius.

And FWIW, punch a hole in a solid state or lithium battery, attach a water hose, and see what happens. lol.

 

[SID297]

Most DD "runaways" are caused by a stuck injector, often after sitting for a while. We always made a habit of pulling the valve covers and working the rack just to make sure everything was working properly before firing one up.