got a couple issues with the runaway 6v53
all were fitted with blowers, and known as naturally aspirated
and some fitted with turbo's with a suffix of 6v63T or TA if aftercooled
if you put a nice thick phone book over the intake during a runaway, the engine would have had to die
reason being, either the air got cut off or the book got sucked in (but it would have died immediately had that happened)
the blower drive in a 2 stroke detroit cannot handle anything of consequence being sucked through the blower rotors
the clearances are far to tight to allow anything going through.
also a 6v53 can handle well over 4 grand without damage, unless there was a part not installed correctly or not torqued.
as for the oil running out like water? not sure what happened their but strongly suspect fuel dillution via a leaking transfer pump
what happens if some guys not knowing any better will install 1/8" pipe plugs in all the weep holes, and if the seals go bad the
leak has to end up into the crankcase instead of dribbling externally where it can be seen.
also 15/40 diesel oil is incorrect for any detroit 2 stroke, straight weight 30 in very cold weather, 40 in warm weather, and 50 in
tropical or equatorial hotter than hell operation.
i have never seen the internals of a detroit having turned blue, a detroit running under load will rarely every damage a crank due to low oil
before a piston seizure takes place, it will always stick a piston before it ever spins a rod brg,,, generally
if i were to bet my lunch money, it would always be on a siezed piston long before brg damage and failure.
having spent many years, doing nothing buy detroit engine work, day in and day out, i have never seen a detroit runaway result in catastrophic failure, i am sure it is possible, but generally if the engine is sound and assembled properly they can wind to the sky, scare the hell
out of everyone in sight, and still live to run another day. that is if there is someone handy to cut off the air.
btw, all naturally aspirated engines had air doors to cut off the air incase of a runaway situation, but they nixed them on the turbo versions
and opted for breakaway racks that would allow one injector to hang in full throttle but not allow the others to be held in full throttle.
i have seen one 8v71 maxed out at just a touch over 4500rpm, and that it about all the engine can do because of valve float
pretty exciting to say the least,
i have also seen a 12v149TTA with a hung injector, straight pipes pointing to the sky
8" in diameter blowing fire ~6feet above the pipe and what i can only imagine looking like mt vesuvious blowing towering plumes
of black smoke above the flames.
that will make you backside pucker
bob g