How would extended idling cause cylinder wall glazing more than running it at higher rpms? I've let my truck idle for hours on end. I have 165,000 miles with no more blowby then when it had 100,000 miles. And still has the same power. Newer electronically controlled diesels don't wash down cylinders like the old mechanical diesels do. If that what your thinking.
Right now it's -25°C here and the truck idle 10 to 20 minutes before I leave. I don't consider that a long time, but sometimes I will let it idle for an hour or so. Let's say, next month we should have some really cold days below -30, and I think I won't shut the truck off for, example, my lunch break (1 hour).What is considered a "long time", are you talking 30 minutes, 2 hours, 4 hours, etc?
LOL Thats right. I used to work OTR driver for a man in Dallas and would go on the lot every once in a while. He would always go over to my truck idling in the lot maybe for an hour or two and shut it off. I asked him why and he said I was wasting his diesel fuel. I asked him if he had turned off his house AC when he left this morning and his answer was well no. It's 110 and would be hot when I get home. I told him then why did you just shut the AC of in my home for the next couple days. After that I started looking the door while it was idling. He would just try to open the door and then walk away shaking his head. That truck would run not get shut off till I went home for the week. LOL JJ:hehe: whodah thunk this thread would turn into a to idle or not to idle debate. I for one with 430,000 miles on mine WILL be letting it idle, like i always have, or if for long periods with the idle slightly raised with my trusty idle control module(rock placed by accelerator to hold pedal down a smidge). Ya'll can do what ya want but idleing a diesel is way better than shutting it off and restarting it all the time :thumb: