Runaway

POWERTRIP · 01-23-2013, 02:14 PM

Okay, I put this question in this forum because this is what I have, but it is really just a general engine question. What is a runaway engine and what causes it. I heard a mechanic talking about one, a while back, and I was just curious what it was. I know that it can't be good.........

6dot6 · 01-23-2013, 02:25 PM

i think its when oil is able to get into the combustion chamber and act as a fuel. pretty much wont shut off til its out of oil or you can cut off the air supply. either some wood or an air knife setup. not sure if its also able to do this with the diesel itself but it might? not sure....

The S.O.M. · 01-23-2013, 02:36 PM

I've heard it can be caused by somehow the turbo oil feed leaking into the compressor housing then feeding that oil into the intake of the engine, thus feeding the engine fuel and air out of control

Banjo Willy · 01-23-2013, 02:36 PM

Ya! At least on some of the old 6.0 PS Furd engines, if the oil seal on the turbo blew & oil could get into the intake, then she would go go go -more heat-more boost-more oil - ultimate failure. This was more of a problem with pre-electronic diesels.
Basically, uncontrolled oil or fuel has to get into the intake & off, she goes. My Kubota tractor has a manual fuel shut off to kill the fuel to the injector pump as a safety.

**DRTYMAX13** · 01-23-2013, 02:40 PM

Pretty much any fuel source (even gas or alcohol vapor) that is exposed to the intake while running will cause it to continue to "run away" until the source is gone... One of the places I used to work in doing tank farms in gas terminals, one of their gas trucks was offloading at a store and the guy left his truck running and the gasoline vapors caused the truck to run away and when the motor blew it caught on fire and actually ended up exploding and burning the store he was at

**2500-HD** · 01-23-2013, 02:50 PM

the old green leakers were notorious for running away...racks sticking, turbo seals blowing...

detroit 4-71 in gmc 650 running away start after the 30 years - YouTube

RUN AWAY Detroit Diesel! 453-T - YouTube

and the ford...very good explanation too.

FUBAR 6 0 RUNAWAY - TURBO SEAL FAILURE LEADS TO TOTAL ENGINE DESTRUCTION - YouTube

TakeEm · 01-23-2013, 02:52 PM

Some of these service trucks in the oil field are required to have air knifes in order to prevent a run-away situation. If you pulled into a location with a major gas leak, you would pull the gas in through the intake causing it to take off and start running on natural gas.

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6dot6 · 01-23-2013, 02:56 PM

wow never thought of that happening. wonder how those vapors are for us to breathe if they are that concentrated lol. what about smoking takem?

dirthand1 · 01-23-2013, 03:05 PM

been around a few diesel engine runaways. one was when i was working near a asphalt pulverizer and the machine hit a natural gas line then the big cat motor revved up to like 5500 rpm until the operator shut her down with a air knife.It could very well happen to your truck or any other .the most common is the seals or bearings go out in the turbo filling the turbo with oil then that goes into the combustion chamber and bam away she goes.. first thing you would need to do is find a way to plug the intake to cut off air.

TakeEm · 01-23-2013, 03:05 PM

Quote:

Originally Posted by 6dot6

wow never thought of that happening. wonder how those vapors are for us to breathe if they are that concentrated lol. what about smoking takem?

There are several occasions of gas leaks= me breathing it in to fix it. Smoking is a MAJOR no in any type of oil field atmosphere. Natural gas is very flammable. Well, it is 130 octane!

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01-23-2013, 02:14 PM	eBay Motors #1 (permalink)
POWERTRIP Junior Member Join Date: May 2012 Location: Central, IL Posts: 112	Runaway Okay, I put this question in this forum because this is what I have, but it is really just a general engine question. What is a runaway engine and what causes it. I heard a mechanic talking about one, a while back, and I was just curious what it was. I know that it can't be good......... __________________ 04.5 GMC Sierra 2500HD SLT LLY, 4X4 CCSB, Bill's Custom Intake Stage 4, S&B Powerstack filter,LBZ MP, 4" turbo downpipe into 5" exhaust, 7" MBRP tip, EFI Live w/ dsp5, Resonator plug, PVC rerouted and plugged, level kit, 33" BFG's, all-on mod 7-6-2011 Head Gaskets, ARP Headstuds, Full EGR Delete, Aftermarket exhaust manifold, Race Valve. Coming soon: CTS INSIGHT, AIR DOG II Lift Pump, Smoked tail Lights, Smoked cab clearance lights, Lift kit, and Built trans.

01-23-2013, 02:25 PM	eBay Motors #2 (permalink)
6dot6 DuramaxForum Enthusiast Join Date: Mar 2011 Location: jackson,nj Posts: 2,061	i think its when oil is able to get into the combustion chamber and act as a fuel. pretty much wont shut off til its out of oil or you can cut off the air supply. either some wood or an air knife setup. not sure if its also able to do this with the diesel itself but it might? not sure.... __________________ - 2010 GMC sierra dually SLT CC - sdp twins,60 overs, efi by rob, trac bars built trans/ suncoast 1058 converter djm 3/5, sleeves and braces, 5inch straight pipe cts insight, ad2 165, 1pc shaft, reroute airbags, bt lockbox thanks to: Bigdipper, ATP, BT Dieselworks, Blackout Performance time to beat: 12.60 @ 108

01-23-2013, 02:36 PM	eBay Motors #3 (permalink)
The S.O.M. DuramaxForum Veteran Join Date: Sep 2012 Location: South Whitley, IN Posts: 1,481	I've heard it can be caused by somehow the turbo oil feed leaking into the compressor housing then feeding that oil into the intake of the engine, thus feeding the engine fuel and air out of control __________________ The Sound Of Madness 2004.5 LLY ECSB EFI Live, MA700 Trans, Airdog 2 165, MBRP 5" with 6” tip, Profab Downpipe, LML Manifold, LBZ Mouthpiece, AFE Stage 1 Intake, EGR Blocked, PCV Rerouted, Resonator Plugged, ADP Race Valve, MA Rear Housing Support, MA Pump Rub Fix, 3" Drop Shackles, BMF Novakanes 20x9, Nitto 420s, Rancho RS9000xl's, Amsoil Synthetics, Autometer Cobalt’s Boost & Pyro, Tint (5% back, 20% front), HID's, Line-X’d rockers To Come!! : Profab EGR Delete Big Single 45% overs

01-23-2013, 02:36 PM	eBay Motors #4 (permalink)
Banjo Willy Junior Member Join Date: Jan 2013 Location: Arkansas Posts: 57	Ya! At least on some of the old 6.0 PS Furd engines, if the oil seal on the turbo blew & oil could get into the intake, then she would go go go -more heat-more boost-more oil - ultimate failure. This was more of a problem with pre-electronic diesels. Basically, uncontrolled oil or fuel has to get into the intake & off, she goes. My Kubota tractor has a manual fuel shut off to kill the fuel to the injector pump as a safety. __________________ 05 4X4 CCSB LLY w/Ally w/147K Edge Juice / Attitude AME Brute Force Intake w/ MP Optima Red Tops Kenwood w/ Alpine Kicker & speakers Over 500k diesel miles since 1995

01-23-2013, 02:40 PM	eBay Motors #5 (permalink)
DRTYMAX13 Duramax Lifetime Supporter Join Date: Jan 2011 Location: Meridian, MS Posts: 914	Pretty much any fuel source (even gas or alcohol vapor) that is exposed to the intake while running will cause it to continue to "run away" until the source is gone... One of the places I used to work in doing tank farms in gas terminals, one of their gas trucks was offloading at a store and the guy left his truck running and the gasoline vapors caused the truck to run away and when the motor blew it caught on fire and actually ended up exploding and burning the store he was at __________________ MATT - 2006 GMC 2500HD 4X4 CC/SB SLT - LBZ "CMNSKLR" ADII 165, MA PUMP RUB, PLUGGED, RE-ROUTED, BLOCKED, K&N, CUT BOX, PPE FITTINGS, RACE VALVE, & FEED LINE, 5" STRAIGHT EXHAUST, KRYPTONITE CENTERLINK & TIE-RODS, COGNITO BRACES, END LINKS & GUSSET, MOOG ARMS & JOINTS, LEVELED W/ KEYS, 20X10 AE 511's, 33X12.50 TOYO M/T's, FRONT BUMPER BUILT BY ME, RECON SMOKED CABS, TAILS & 3RD BRAKE LIGHT, BILSTEIN 5100'S, LINE-X, ETC.

01-23-2013, 02:52 PM	eBay Motors #7 (permalink)
TakeEm DuramaxForum Enthusiast Join Date: May 2011 Location: Pinedale WY Posts: 2,754	Some of these service trucks in the oil field are required to have air knifes in order to prevent a run-away situation. If you pulled into a location with a major gas leak, you would pull the gas in through the intake causing it to take off and start running on natural gas. Sent from AutoGuide.com Free App __________________ Caleb 22 2007 LBZ CCSB S475/stock Wehrli Twin Turbo Kit/Suncoast Built by Dmitri Millard EFI Live DSP5 by Duramaxtuner.com 5" DE, rerouted, debadged, demolded, 18X9 BMF Novakanes Stealth wrapped with 285/65/18 Nitto Trail Grappler MTs, 45 gallon transfer flow replacement tank, Amp power steps, All Season bulletproof trans/power steering line kit, Airdog II 165, Nicktane with Cat filter, Edge Insight CTS with pyro Big thanks, Duramaxtuner.com & Willie @ Synthetic Motorsports

01-23-2013, 02:56 PM	eBay Motors #8 (permalink)
6dot6 DuramaxForum Enthusiast Join Date: Mar 2011 Location: jackson,nj Posts: 2,061	wow never thought of that happening. wonder how those vapors are for us to breathe if they are that concentrated lol. what about smoking takem? __________________ - 2010 GMC sierra dually SLT CC - sdp twins,60 overs, efi by rob, trac bars built trans/ suncoast 1058 converter djm 3/5, sleeves and braces, 5inch straight pipe cts insight, ad2 165, 1pc shaft, reroute airbags, bt lockbox thanks to: Bigdipper, ATP, BT Dieselworks, Blackout Performance time to beat: 12.60 @ 108

01-23-2013, 03:05 PM	eBay Motors #9 (permalink)
dirthand1 Junior Member Join Date: Mar 2010 Location: yucaipa Posts: 183	been around a few diesel engine runaways. one was when i was working near a asphalt pulverizer and the machine hit a natural gas line then the big cat motor revved up to like 5500 rpm until the operator shut her down with a air knife.It could very well happen to your truck or any other .the most common is the seals or bearings go out in the turbo filling the turbo with oil then that goes into the combustion chamber and bam away she goes.. first thing you would need to do is find a way to plug the intake to cut off air. __________________ 07 GMC lbz CST 6/8 at 7 on 35"Toyo mt's Rob's dsp5 Ppe fprv Ppe ported fuel rail fitting 3" mflow dp s.d.p egr delete 4" mflow tb exhaust into 6" stack ported and polished exhaust side vgt turbo 5/8" backhoe hydraulic tranny lines .pcv reroute danvilleperformance resonator plugs.[I]electronics8000k lo's fogs and reverse lights led parking lamps and signals blue led gauge cluster and HVAC controls.led pyrometer and boost.pyrometer flashes gauge red when I hit my preset temp ridiculous stereo train horns led tails.

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