Diesel engine idleing

PopinJohn

Member
Interesting post & thread about idleing a Diesel.
Trucking industry magazines have carried articles for years about the evils of PROLONGED idleing.
During my time with Caterpillar, I remember that in the truck shop, they would check the computer readout for idleing time, and some warranty claims were not honored for this reason.
During my time with Detroit Diesel, I remember surveys at truck stops to check coolant and oil temp, for "slobbering" and white smoke.
It didn"t matter whose Diesel it was, after 3-4 hours idleing in zero and below weather, the coolant temperature would drop to the point of misfiring cylinders and white smoking.
Oil pressure doesn"t have anything to do with it.
At low idle, cold intake air will chill the cylinder to the point of misfiring, but the engine will continue to run on serveral cylinders, though raggedly.
The "idleing" thing got started in the old days due to poor batteries and difficulties getting a Diesel to start in cold weather.
It was understandable, if the thing wouldn"t run, you couldn"t work.
They have got to be covered up or plugged in.
My 2 cents.
 
Good points, I think my post may have got blown out of porporation. I ment ideling for a few minutes while one goes into a gas station to buy a paper, or for a few minutes after cleaning the barn. However I did work for one farm that would leave there tractors ideling all nite, because they wouldent buy block heaters. Finally they realized it was costing them a fourtune in fuel! LOL J
 
i know oil pres. does not apply to what your talking about, engines slobbering. you are very correct. but in my case it does apply to valve train wear, i was leaning more to the gasoline engines in trucks as an example.pointing out that unnessesary idleing produces unnessesary engine wear.
 
I was amazed at how many came down against idling, found for myself long ago that it didn't keep the motor warm but I expected to be in the minority.
 
Trusting to luck leaving it idling on the tarmac while buying a paper, Lady did that her in Oz last month, came out and the car and child in the back seat were no where to be seen, found them abandoned hours later after a big search.I would have felt safe doing that in the 1940/50"s but not today.
 
Leaving your diesel pickup idling in the parking lot is the redneck equivalent of walking around with a boom-box on your shoulder. Everyone will know just how cool you are when they hear your loud rap music or noisy, smelly diesel engine. Somebody doesn't like it? Too bad, let them buy their own 100 dollar boom-box/60 thousand dollar pickup truck.
 
My Powerstroke never would warm up when idling. I put a new thermostat in it, a grill cover, and finally resorted to blocking the radiator with cardboard. I guess it was moving too much air for the fuel it was burning.

Aaron
 

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