[AT] Cracked diesel block opinion question and welding cast iron

[Mike Sloane]

White "smoke" coming out of a diesel exhaust is just unburned fuel. If 
it has glow plugs, they weren't lit up, but if it has a manifold 
heater/burner, that isn't working either. You can rarely start a cold 
diesel without some kind of source of ignition. I am not familiar with 
the AC engine, but in the case of direct start IH engines, they use glow 
plugs that have to be on for about a minute before cranking the engine. 
Some of the older Ford diesels actually had a red hot igniter in the 
intake manifold that would pass some burning fuel into the combustion 
chambers, along with the raw fuel from the injectors. There are a number 
of other schemes for lighting up a cold engine, but just plain cranking 
won't usually do it.

Mike

carl gogol wrote:
> Just came back from looking at the AC 170 that has the Perkins with a 
> cracked block.  The crack is on the left side and stretches horizontally 
> between two frost plugs on the upper part of the block  --- same place 
> as yours Cecil??
> 
> It is quite cold today about -3 C, or 28 F, and the engine would not 
> start. The salesman was about to get some ether and the engine failed to 
> turn over anymore.  He had cranked quite a while and all we got was 
> white smoke and a few slightly energetic near fires - but it just 
> wouldn't touch off.  I could feel the solenoid kick in with my hand on 
> the starter, but in a way was surprised that the starter wasn't warm to 
> the touch for all the cranking it had done.
> 
> Do you think it didn't fire because of low temp or low compression?  
> Some white smoke coming out of the manifold area, could be a gasket or 
> worse a crack in the manifold.  It was cold out!
> 
> Carl Gogol
> Manlius, NY
> (2) AC D-14, AC 914H
> Simplicity 3112 & 7116
> Kubota F-2400


-- 
Mike Sloane
Allamuchy NJ
mikesloane at verizon.net
Website: <www.geocities.com/mikesloane>
Images: <www.fotki.com/mikesloane>

"What is past is prologue." William Shakespeare (1564-1616)


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