Delica Canada | Mitsubishi Van Club

Firesong wrote:Hopefully your not suggesting pulling plugs while it's running to fire the compression out the glow plug hole? Can you say bullet to the head?

I am not, no!

But the question was - would removing the plugs stop the runaway - it would.

The reason it would stop the runaway is not because glowplugs are used to start or heat the engine, but the act of removing the glowplugs leaves a hole in the head, which destroys the compression. No compression, no fuel ignition, no power stroke.

But, like you said, the glowplug would fire out under high pressure, which would be bad. There is also the risk of the head exploding during the runaway while you were trying to remove the plugs, which would mean you would get a piston and a valve cover to the face perhaps.

In a runaway situation you can just pull the rubber PCV hose that connects the rocker cover to the intake- unless the oil is coming from the turbo, in which case you're screwed.

Growlerbearnz wrote:In a runaway situation you can just pull the rubber PCV hose that connects the rocker cover to the intake- unless the oil is coming from the turbo, in which case you're screwed.

This is why, on my L400 I would stuff a shirt in my snorkel or open the airbox and jam a shirt or jacket in there.

Diddo on the shirt in the air box opening...
easier on a L400

Crazy visions of a glowplug shot to the head lol

FS

Runaway: Would blocking the end of the exhaust tail pipe work too ?
Lapprentis

Lapprentis wrote:Runaway: Would blocking the end of the exhaust tail pipe work too ?
Lapprentis

It would, yes, if you could overcome the pressure of the exhaust.

In general, with a runaway, the RPMs are climbing or remaining constant at a high level well above idle, so plugging the exhaust would not be easy.

With plugging the air intake, the engine is helping you push in the blockage. With the exhaust, the engine is fighting to resist the blockage.

A while ago My Fuel shut off valve stopped working I was in a pinch so I removed the plunger from the valve and installed back into the inj pump....worked great only problem was I could not shut it off!The first thing I tried was pulling off the air intake duct and covered it with my palm...
I was surprised that basicly totaly covering the air intake still did not shut it down.I eventually pulled the fuel line off the filter to kill it.

Back to the excessive oil issue I have now pulled the head off,No smoking gun as of yet....
looks like a bit of oil was running down valve seals and possibly a leak into an oil gallery.The cylinder walls still look in great shape...
I am going to install New gaskets,New Valve seals,remove EGR and install catch can....
Hopefully it will run better.More to follow!
Thanks for everyones input!

dennis_lambert wrote:A while ago My Fuel shut off valve stopped working I was in a pinch so I removed the plunger from the valve and installed back into the inj pump....worked great only problem was I could not shut it off!The first thing I tried was pulling off the air intake duct and covered it with my palm...
I was surprised that basicly totaly covering the air intake still did not shut it down.I eventually pulled the fuel line off the filter to kill it.

Back to the excessive oil issue I have now pulled the head off,No smoking gun as of yet....
looks like a bit of oil was running down valve seals and possibly a leak into an oil gallery.The cylinder walls still look in great shape...
I am going to install New gaskets,New Valve seals,remove EGR and install catch can....
Hopefully it will run better.More to follow!
Thanks for everyones input!

Hopefully that works for you, as opposed to our digression about runaway.

A few days ago after removing the cylinder head I added about a half inch of oil in each cylinder on top of piston.Last night I checked and in one cylinder the oil was gone!The other three the oil is at the exact same level.
Now i am back to thinking it is the piston rings.
Tonight i am thinking about attempting to use a gasket and Alum plate across the block and attempt to pressurize each cylinder and confirm leakage past rings....

Any piston slap?

on the note of stuffing cloth in the intake, I remember reading about a motorbike that had an old t-shirt stuffed in the seat area for rag purposes, got dragged into the intake and literally sucked through the engine, not sure how great it would be...