Re: 706 d

Posted by Hugh MacKay on October 17, 2003 at 19:52:50 from (209.226.247.130):

In Reply to: 706 d posted by nate on October 16, 2003 at 18:28:26:

Nate: I don't know what all the fuss is about. I encountered my first diesel about 45 years ago. I've yet to see one that didn't smoke on a cold morning. My first encounter was a Cat with a pup. next two 282D in 560 and 656. Sure you need to use the glow plugs as KB said, but once their running smooth, can it. I later had 1066, John Deeres and Perkins. Of those engines I never rebuilt any of them under 10,000 hours. The 2 - 282 engines were the only ones with glow plugs, and yes I held them in until running smooth, after that I let them smoke.

Since that I've run Cummins. direct start Cats Detroits 2 cycle and 4, Kubota and just recently a Mack. What I am curious about is what these guys recomend when all those diesels without glow plugs, start smoking on a cold morning. You come far enough north to find -20 to -30 degree weather , let that diesel you have been running for several hours, idle for 5 or 10 min. The engine temperature will drop to about 130 and yes they will all start smoking again at that point. I have in the past 20 years, become acquainted with diesels in trucks. On cold winter mornings you start them up and could warm them up for 20 min., but the heater will not generate heat until you start to work them, nor will they stop smoking until then if cold enough.

I will give an example. A person I know became incharge of receiving at a Supermarket. This person thought I will show those truckers who's boss. One morning when it was about -25F, this person decided to let the truckers sit out in the cold for about 30 min before receiving. The truckers kept engines running to keep warm, couldn't blame them. When the doors were finally opened, there was a light breeze blowing towards store from about 6 trucks. This receiving person complained about the smell of raw diesel going right through the supermarket. I advised this receiver that had they received these trucks hot off the highway, before they cooled down, this wouldn't have happened, as she wouldn't have had a line up waiting, and trying to keep warm. The guy at the dock had to shutt off his diesel, but the rest in line didn't. So much for bullieing a trucker.

This is precisely why diesels should not be left idleing in cold weather. The engine temperature will drop to a point where fuel is not burned efficiently, and it shouldn't be left running.

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