Originally Posted by windguy
Are you saying have to wait 10 minutes before restarting a diesel after it's been turned off?
No, my opinion is that you can run a diesel and or idle it safely for long periods as long as you don't turn it off after extended idling. Meaning the worst thing you can do is idle it for 20 minutes and then shut it down, because all the carbon buildup from idling then cools and hardens in the engine... which does cause a problem.
My contention is that driving it at normal operating temperatures (highway) after extended idling is fine and will burn the excess carbon deposits, but that's something I read somewhere on the Internet, so it's largely an opinion vs. the "never ever idle your diesel" attitude.
I tend to leave the diesel running if possible, just because it's easier/better for them in a lot of situations, but that's a whole other topic!