Grenanded the engine in my 2015 3500 w/Aisin

[seafish]

What about the throttle butterfly we have? would that not shut off the air?

Someone on CF posted link in that thread to A BD distributed product that does in fact work with the throttle valve on a 6.7 to effectively shut off air flow in case of a runaway.

 

[Learjet]

Someone on CF posted link in that thread to A BD distributed product that does in fact work with the throttle valve on a 6.7 to effectively shut off air flow in case of a runaway.

So the programming in the engine computer doesn't already do that...interesting.

 

[tugboat1st]

There is no air valve, that is the problem. Most runaways are caused by a bad bearing in the turbo that allows oil to pass from the center bearing in the turbo to the intake system. This results in the engine running on crankcase oil uncontrolled. There is no air valve on a stock diesel engine and therefore no way to control the engine. Generally results in the bottom end failing due to excessive rpms and lack of lubrication due to oil loss. The only way to stop it is to stuff a rag into the intake of the turbo to shut off air flow.

 

[6V92TA]

crankcase breather on a ISB should drain back to the sump, not the intake , so that shouldn't be the cause. any diesel runnng on its own oil or an outside combustible going thru the intake isn't going to shut down barring the use of a fire extinguisher or somehow totally choking off the intake.

 

[CMB]

All I can say is.......

WOW:--)

 

[m37]

Expect an addendum to the owners manual right after - wear your seatbelt, dont leave children or pets alone in vehicle, dont touch a hot stove or your exhaust manifold bla bla........... "Do not operate vehicle at extreme angles! Runaway may result."
If anyone is really concerned, just install a fire suppression system with a spray nozzle directly into the intake system. The fire suppressant will remove all the oxygen and the "fire" (combustion) will be extinguished. This would be the least expensive/least intrusive way to remotely stop a runaway. Using a throttle valve butterfly would work to lower the RPM maybe to a safe range, but the engine will grab air wherever it can to keep running. Just an FYI, NEVER TRY TO USE YOUR HAND TO ATTEMPT TO BLOCK THE INTAKE OPENING, the vacuum generated could invert your hand, breaking bones.

 

[tugboat1st]

If that was a reply to my statement, I never mentioned anything about the crankcase breather. I was referring to the oil fed to the turbo charger for lubrication. If the seal is lost between the bearing and the case the turbo will draw oil from that point and feed the engine on that oil. This depletes the supply of oil in the crankcase causing the engine to either seize or throw a rod. This is the most common cause of a runaway.

 

[tugboat1st]

m37, That sounds like a good idea. In the oil field where I worked for some thirty years, all diesel trucks were required to have installed a mechanical air shut off butterfly in the intake to the turbo to prevent a runaway. This was because of the possibility of ingesting flammable atmosphere around oil production facilities. There was a few incidences where engines ingested natural gas through the air cleaner and resulted in a well fire in one case when the engine blew up. The air valve worked very well. They had to be tested to prove they successfully killed the engine. The fire suppression system maybe an easier install.

 

[Jared Herzog]

m37, That sounds like a good idea. In the oil field where I worked for some thirty years, all diesel trucks were required to have installed a mechanical air shut off butterfly in the intake to the turbo to prevent a runaway. This was because of the possibility of ingesting flammable atmosphere around oil production facilities. There was a few incidence where engines ingested natural gas through the air cleaner and resulted in well fire in one case when engine blew up. The air valve worked very well. They had to be tested to prove they successfully killed the engine. The fire suppression system maybe an easier install.

I was near a guy running a backhoe. He hit a city gas line and gas burst from the ground. No flame. But he jumped off the backhoe running without turning the key off. Before long it sucked the gas into the intake and ran wide open but not for long. Was an amazing sight.
I would be interested to see if it was the turbo oil feed or the ccv filter and its attachment to the turbo. That turbo probably had a pretty decent rpm which would have compounded the problem of pulling a higher vacuum on the ccv and its oil.

 

[m37]

And if you go that route, you could add additional nozzles in the engine compartment. Just a note, as I call around to junk yards looking for aluminum rims and maybe leather seats for my 2017, the majority of trucks are BURNED. Makes you wonder?

 

[tugboat1st]

Jared, yep there is nothing like hearing a diesel engine revving about 6 thousand RPM. Not good.

 

[Newsa]

We may never know IF the 42° angle was cause for the runaway? Only an investigation will tell for sure. But it is rare that someone would be running the engine at that angle. So the cause if the runaway might not be typical?

Of course the ccv SHOULD drain to the pan. But does it drain like it's SUPPOSED to at nearly a 45° angle? On the other hand....seems like there would be more restriction in the ccv than the turbo if the turbo bearing and seals broke?

I guess the extreme angle might cause the turbo bearing to not get adequately lubed?

Could it have been tuned and tuning went awry?

Maybe they won't put a lid on their findings and lock that info away?

 

[MarkEagleUSA]

the majority of trucks are BURNED. Makes you wonder?

My guess would be that if the newer trucks are burning, it's most likely electrical with all the gizmos they have now. If there was a problem with runaways you'd think the word would be out there by now.

 

[jacknife]

I had that happen to me with an 8V92 Detroit . The check valves going to the pan plugged up and the airbox filled with oil gave it some fuel an it took off. I did have a manual shutdown that cut the air off. Still too late $ 9000 later I was on the road. That was in 1980 !

 

[rhoads]

engine was most likely running on engine oil--same as when turbo seal failure oil is sucked back thru intake. good luck.

 

[ram7091]

If that was a reply to my statement, I never mentioned anything about the crankcase breather. I was referring to the oil fed to the turbo charger for lubrication. If the seal is lost between the bearing and the case the turbo will draw oil from that point and feed the engine on that oil. This depletes the supply of oil in the crankcase causing the engine to either seize or throw a rod. This is the most common cause of a runaway.

I have been around a lot of motors with bad turbo seals running up and down the road. I can't recall ever seeing one runaway over it

 

[Oz_Ram]

Needs one of these:

https://www.dieselperformance.com/s...-6-7l-2010-18-pick-up-2011-18-cab-chassis-636