Oil system diagram for 1994 e350 na idi ambulance?

[Macrobb]

Because of the IDI design, a stuck-open injector will cause a bad knock(firing way too early), but generally won't melt a hole in a piston, because the diesel won't be hitting the piston until after it lights off. In a direct-injection design, you would get a hot spot caused by diesel not spraying properly, a bunch of it hitting one spot, and that's what will melt the hole... at least as far as I know.

 

[Thewespaul]

They wont instantly a hole like direct injection but it will have very high egts, pretty much will just melt down that piston and eat the cylinder

 

[Macrobb]

They wont instantly a hole like direct injection but it will have very high egts, pretty much will just melt down that piston and eat the cylinder

I believe you, but I'd also be interested in seeing pics of this if you run across any.
I've seen the edge/corner of the piston eaten away a little on motors that were run hot, but that's the worst I've seen, and it was only 1/16" or so deep; totally not a problem when the rings are over 1/2" down.

 

[Thewespaul]

Dont have any dramatic failures here but I believe I remember seeing one piston that had some melting around one edge in an engine I tore down last year, Ill see if I can dig it up and take some pics.