A Detroit 500 engine riddle, can it be solved

You would want to go into the ECM and look at history and see the max RPM it went to,if it got above 3750 I might start too worry. The crank should be OK if the block is OK I would get exchange rods, but that is just Me. A clip board will shut down the air in any engine.

 

JohnP3...As a brand new member here,i hate to call you out,but i know for a FACT that ANY internal combustion engine CAN and WILL run away if it is allowed to get a fuel source thru the intake...read any repair manual...i personnally had a cummins that blew the seal in the turbo while under load and BURNED 7 gals of oil before i was able to stall it...good thing i didnt take it out of gear,or it WOULD have run away...i know,you been trucking for 44yrs, well i have been around trucks and diesels ALL of my life,and this was one of the FIRST things my dad taught me...if you think that they wont,just try pouring a gal of fresh oil into your intake and see what happens...sorry if you think i'm being rude,but you are most DEFINITELY WRONG
I have been driving now for 28 yrs and owning my own trucks for 16,and i know I would not do it.

 

well trucker I have seen units come in that have been pulling a 20 mile hill and the turbo went out the guy nursed it, and called, he got it to the top of the hill to the brake check he was in the first hole when he got to the top. It was towed into the shop and the CAC was completely full of oil. All it did was rattle and smoke and rob the power. I have seen two cycle Detroit's full of fuel in the crank case that it came out the dipstick, blowers with the seals washed out not one blew up.
If your dad told you it must be right!

 

Oil company I used to work for, hauled oils, in tanks naturally, and coke, in end dumps, from the refinery. When our power units were equipped with the Cummins M-11, and ISM engines, for some reason, the "coke" trucks had a high rate of turbo failure; I guess the extremely fine coke dust would eventually wear down the turbo seals. The engine oil would come out the exhaust pipe and cover the side of the trailer. Nine miles from the refinery to the terminal, and many had to be towed in because enough of the engine oil had been sucked out to cause a "shutdown".
To my knowledge, no engine ever "ran away".

 

probably because the oil was going out the exhaust side of the turbo...trust me,if it gets into the intake side,it can run away

 

Maybe Mythbusters could tackle this one, they're good at blowing stuff up....

 

The statement about the oil covering the side of the trailer was made to give an idea as to the volume of oil that the turbo sucked out of the engine in a short time. I have no idea how many also had the intake seals fail, flooding the intake with oil, (no runaways there either). If I can remember, I'll place a call to the shop foreman there, to see if any engines did run away due to oil in the intake, since I left. The mechanics were more concerned having to clean the oil slung out of the exhaust, than a runaway engine; They always advised the driver to drive the truck to the shop, as long as it didn't make too big a mess.
I was relief dispatcher for our crude oil terminal, and the previously mentioned coke and light oil terminal. Both terminals always seemed to be short of trucks; losing a unit due to turbo failure was bad, because of the time required for the oil clean up, both intake and exhaust sides. Once again, as many turbo failures as the coke trucks experienced, losing a unit to a catastrophic engine failure, such as a runaway due to oil in the intake would in all likely hood have the three regular, and two relief dispatchers looking for Valium.

 

http://www.youtube.com/watch?v=mgPF0yJxWY0


http://www.youtube.com/watch?v=q4fxjKnuI4Y&feature=related


http://www.youtube.com/watch?v=M-pxsViKF88&feature=related


http://www.youtube.com/watch?v=Fw2r_lIRgpY&feature=related

 

You can make any engine fail, you have to have fuel injected into the cylinder to do that.
As I said before a diesel is a compression ignition engine and to make usable power, it has to be ignited at a certain narrow band in the engine timing to make usable power. If you draw in oil into the cylinder, first off it is not a good fuel, secondly it will start burning before TDC and that is the knock draining the power from the engine and by the time it gets to the after TDC it has burnt most of the oxygen and has a limited amount left to give you any effective power, also the faster the engine goes the timing is more and more important, and the pre ignition becomes more and more of a limiting factor.
Engines that use the oil base fuels, run at a slower speed because it takes them longer to absorb the heat to gasify and burn efficiently.

 

Tell ya what John,we'll just agree to disagree...but i know that under the right conditions,it CAN happen...i never said it would happen EVERY time,just that it CAN...oil is a FUEL,just like any other flammable liquid or gas,under the right conditions,if sucked into the intake,it will cause a runaway.