Posted by D Slater on February 17, 2009 at 19:33:51 from (71.164.63.223):
In Reply to: Re: MD Questions posted by Janicholson on February 17, 2009 at 16:58:23:
Jim I'm not claiming I know whitch is the best way to shut a gas start diesel down but I have some questions and thoughts about it and will probably get flamed on them. Lots of times I see someone say they run hotter on gas. I,m having a hard time with that. Heat is what fires diesel fuel in the cylinder. If you let one of those engines run unloaded until temp. drops and stabilizes then switch to gas for 15 to 20 seconds until engine clears up on one of the later models that has a switch then shut it off and switch back to diesel, I can't see where it would heat things enough or any to matter whitch way its shut off in above case. Also I wonder how hot the starting chamber is with intake butterflies and starting valves closed. If switched to gas I would think the intake air would be cooler than inside engine and would offset any heating of the head if just run a short time on gas. My own opinion is if allowed to cool on diesel first and if switched to gas for 30 seconds or less it doesn't matter a lot which way is used. But I don't claim thats the correct answer.
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