A couple months I posted some photos of a Dmax that ran away until it self destructed. The photos show bent push rods, broken rockers, etc. The owner said all he did was start it up and away it went. The cat is out of the bag now. He had just cleaned his K&N air filter using gasoline, did not dry it off, reinstalled it, started the engine and the rest is history. The photos are still on Yahoo at


http://pg.photos.yahoo.com/ph/fnsblum2004/album?.dir=7b47&am (http://pg.photos.yahoo.com/ph/fnsblum2004/album?.dir=7b47&.src=ph&store=&prodid=&.done=http% 3a//pg.photos.yahoo.com/ph/fnsblum2004/my_photos) p;.src=ph&store=&prodid=&.done=http%3a//pg.photo s.yahoo.com/ph/fnsblum2004/my_photos Later! Frank

well i guess we all know the moral of that story!

Yeah, get rid of the K&N filter and stick with the AC Delco paper filter! http://www.dieselplace.com/forum/smileys/hihi.gif

NO, gasoline doesn't belong anywhere near a Duramax

Hell he may as well soaked the filter in gunpowder with a fuse than lit it on start up...same result

Frank....


major ouch ... do you know if they were able to rebuild his motor or did it have to be replaced?


Jim

The moral of the story is,the answer to injector whoa'ssssssss!


Giddy up,cowboy gets some petro and have at it.Where are those oily Couch cushion when I need them.





Mac http://www.dieselplace.com/forum/smileys/smiley5.gif

I bet 95% of diesel owners dont even know what a runaway is.



Ive read a few reports of TDI's running away from a blown turbo, or
overfilled crankcases...They at least have anti shudder valves that
automatically block the intake when the key is turned off.



I am always EXTRA careful when I know fumes are present. http://www.dieselplace.com/forum/smileys/smiley3.gif

I guess I'm one of the 5% that knows what a diesel runaway is, cause I learned about it here on "The Diesel Place" months ago! http://www.dieselplace.com/forum/smileys/smiley32.gif

What an A-hole.http://www.dieselplace.com/forum/smileys/smiley32.gif

What an A half, it would take two of him to make an Ahole.

Some people just shouldn't own trucks...

Jim, they were able to save the engine or should I say the Dmax refused to die. This is one tough SOB. It reved high enough to float the valves which bent every push rod and broke a bunch of the rocker arms. I think this engine has solid lifters so it must have pegged the tach. They replaced all the push rods, rockers and put it back together. They might have done more. I was on vacation when they finished it up. It is still running. Later! Frank

i know what a runaway is first hand, my uncle had an old bulldozer that started on gas, then you flipped the switch to swap it over to diesel once it started up and ran for a few seconds, pretty old machine. so anyway he had it at my parents house and my dad was using it and the seal in the injector pump let loose, which kept the gas and diesel side of the pump separated, the puppy started taking off, he shuts the throttle down but it still keeps gaining revs?????? LUCKILY the ground was fairly firm and there was a big pile of dirt he was working on, he just dropped the blade and started hogging into the pile it had just enough traction, and not enough power that he finally was able to bog it down and stall it out. for a minute he was gettting ready to bail off it since it didnt look like it would die and he didnt want to be on it when it blew up!!!

So did the dealership warranty that guy's stupidity frank, or was it customer pay???

They warrantied the truck because he is a good customer. I sure like these guys and know they will take good care of me if I need them. Later! Frank

what exactly is a runaway and what causes it/ can an overfilled crankcase 9oil0 cause this/ what are other causes to watch out for. sorry for my ignorance.





wally b

I can't imagine the air filter, even sopping wet, holding enough gasoline to do that. I guess it goes without saying that he didn't reoil the K&N. Plus, you aren't supposed to clean them with gas anyway.

Hope I have that decent a dealership if I have some major problem then. Sounds like they are pretty good guys.

A runaway is when the engine is running and it just starts revving up on its own and keeps going until it self destructs. In this case the guy started the engine with gas on his air filter which Im sure the turbo mixed up nice with air and the engine was burning the gas and revved off of it until it bent everything. I don't think an overfilled crankcase of oil would cause this.

A runaway is when the engine is running and it just starts revving up on its own and keeps going until it self destructs. In this case the guy started the engine with gas on his air filter which Im sure the turbo mixed up nice with air and the engine was burning the gas and revved off of it until it bent everything. I don't think an overfilled crankcase of oil would cause this.





Most of the run-aways I have heard of where the old Detroits, 2 stroke and too much oil in crank case could do it.


Since Detroit an Dmax both start w/ letter D, that must be the confusion http://www.dieselplace.com/forum/smileys/hihi.gif.


I heard of a person pulling up his shirt and using his belly to block the intake tube on a semi motor running away(cummings I think), he had the biggest hickey ever http://www.dieselplace.com/forum/smileys/hihi.gif

Bet that hurt like hell.

You can get a runaway if the crankcase fills with oil or fuel, especially if its a closed vent system. The LB7 won't runaway with a crankcase full of oil/fuel because it is vented to the atmosphere, but a LLY full of fuel/oil will runaway. I kinda think thats why they went with the injectors "outside" the valve covers, so that if they fail and leak fuel, it won't cause a runaway. A bad turbo can also cause a runaway by leaking oil into the crankcase - either it runs out of oil to burn or the engine comes apart, usually the latter. I've had 2 runaway on me, both with bad turbos, the first I was about 20 feet away and I heard it start to rev up slowly, I went over and shut off the key, kept running, reached over put my clipboard over the intake and shut it off (Isuzu / NPR). Second runaway, I had my helper put a turbo on at the time, UD3300 NE6T ( big 6 cyl) and asked him if the intercooler was clean. He said it was good to go. Went for a road test, one good rap on the pedal and the thing hit about 6,000 RPM instantly. That is a wicked noise hearing a big inline 6 diesel at 6,000. I was already in 3rd gear so I dumped the clutch and stood on the brake until I stalled it. Smoked the dual rear tires for about 20 feet and you could see the skid marks from the front tires being "pushed". I don't want to do that again!! Engine still ran ok after we cleaned out the intercooler!

These engines don't have an overspeed shutdown:confused: ? All the stationary diesels I worked on had a govenor that would attempt slow it down first, then just shut down the throttle if the govenor didn't work.

If the person is saying it's fumes from gasoline in the air filter I doubt that would have caused the run away. There just isn't enough fuel (gasoline in this case) to cause the outcome.

"There's somthing awfully screwy going on around here." - Elmer Fudd

I bet 95% of diesel owners dont even know what a runaway is.



Ive read a few reports of TDI's running away from a blown turbo, or
overfilled crankcases...They at least have anti shudder valves that
automatically block the intake when the key is turned off.



I am always EXTRA careful when I know fumes are present. http://www.dieselplace.com/forum/smileys/smiley3.gif
Years ago I bought a 2 cycle John Deeree Mower which was to last me for a least ten years. In the 3rd year the govener screwed up one day and the motor reved up and just screamed I was scared and backed off about 50 ft and let her go. It ran just about a minute and then flew apart Some of the pieces punched holes in the block and the rod broke alond with piston. The mower set in the shed for about four years and then one day I got the bright idea of putting a belt driven OHV Honda on it. Had to take the Blade/Brake/Clutch off and change the control cable arrange ment but now I've got a good mower. Its been running 4 years and I mow two yards about every4-5 days for about 10 months a year.

These engines don't have an overspeed shutdown:confused: ? All the stationary diesels I worked on had a govenor that would attempt slow it down first, then just shut down the throttle if the govenor didn't work.
That wouldn't shut down a runaway because the fuel is coming from another source than the injector pump. The governor would shut the fuel off, but if the fuel is coming in as engine oil through a blown turbo seal or elsewhere, it has no control over the speed. The only thing I have heard of is an automatic flap that closes over the air intake if engine speed goes too high.

marcdeluca-Thanks!

problem is when the flap isnt strong enough to keep the air shut off.....

Seen one from a bad turbo, heard of others

Motors every time in these cases

Like I said: The foam filter full of gas caused this engine to run away as per the owner of the truck. When I relayed this info to the Techs they new it would do what it did. One of the older Techs said they used to use gas on a rag held to the intake of the 6.5 to help get them started. This is not a direct quote but if necessary I can get one. Later! Frank

Frank, scary and cool all at the same time. . .

Dennis

good post....................this senario has happened before...........either is a no/no also for the dmax:eek: