"Run away" diesels

[GuyFawkes]

Guy, I don't understand how the engine can continue to run with no compression.  Even with ample fuel and air.

It's not normally done, but what's the technical downside?

_my_ objection is the decompression bit could go wrong, a cut off of oxygen cant

decompression is 1000000 times better than no plan, I just don't trust murphy not to intervene in any plan

[kpgv]

Regarding the exhaust valve "compression release", it can't hold the valve off the seat all that far, since the piston will hit it.
Maybe at speed, and all warmed up, it's not enough?
As for the "Ax" shutdown, maybe take a hack at the pushrods too
Can't run too well missing those...
Maybe less messy, too

Kevin

[jimmer]

I'm beginning to think that explosive head bolts might be the only surefire way to slow'em down.

Of course the cure might be as bad as the disease.

jim

[GerryH]

I'm beginning to think George B got it right.
"You should check with all State, County , Provincial and Federal authorities, and follow the direction of a qualified mechanic. You should never run one, especially if you have trouble tying your shoes"

[solarguy]

You know, you're all right.  I need to implement something!

Here's a fun link where a diesel mechanic describes a few runaways he's seen.

http://www.motorwatch.com/automotivebible/mechanics_nightmares/mnm09.htm

The common thread in all of these incidents is the rapid onset and the instant adrenalin/fear.

Finest regards,

troy